tnt2011 poster abstracts book

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TNT2011 November 21-25, 2011 Canary Islands-Spain

INDEX - POSTERS


(Please, find your final poster number by looking up your name in the Author Index displayed in the Registration and the Poster Exhibition Areas)

Presenting Author Country Topic Poster Title Student/ Senior

Abdusalyamova Makhsuda Tajikistan NanoChemistry Biosorpsion of antimony, nercury and gold at complex conversion of intractable ores Senior

Amato Filippo Czech Republic

Low dimensional materials (nanowires, clusters, quantum dots, etc.)

Diamond-Like Carbon (DLC) chemical vapor deposition technology: Characterization of DLC nano-layers and Artificial Neural Networks for process modelling Student

Arias Mediano Jose Luis Spain Nanomagnetism and

Spintronics

Design of Maghemite/Poly(D,L-lactide-co-glycolide) Nanoparticles for Magnetic Fluid Hyperthermia Senior

Arias Mediano Jose Luis Spain

Nanostructured and nanoparticle based

materials Magnetite/Chitosan Nanocomposite for Magnetic Gemcitabine Targeting to Cancer Senior

Biedma Ortiz Rafael Spain


materials Biodegradable Magnetic Nanomedicine Based on the Antitumor Molecule Tegafur Student

Biedma Ortiz Rafael Spain


materials Magnetosomes for Anticancer Therapies based on 5-Fluorouracil Student

Buencuerpo Jeronimo Spain NanoOptics &

NanoPhotonics 3D-FDTD Analysis of Absorption Enhancement in Nanostructured Thin Film Solar Cells Student

Bursikova Vilma Czech Republic


materials Plasma deposition of nanocomposite protective coatings on polymer substrates Senior

Chapartegui Maialen Spain


materials Multifunctional Layers for Safer Aircraft Composites Structures Student

Chashchikhin Vladimir Russia Theory and modelling at the

nanoscale

Molecular design of a sensor for small analyte molecules based on a dye adsorbed on silica nanoclusters and nanopores Student

Chen Xuecheng Poland


materials Template based synthesis of different mesoporous carbon nanostructures Senior

Choi Seong Soo Korea Nanobiotechnologies

Fabrication and Characteristics of Plasmonic Nanopore on the Pyramid for Ultrafast Genome Sequencing Senior

Choi Seong Soo Korea Nanobiotechnologies Dynamical Formation of Plasmonic Nanopore and its Optical Characteristics Senior

Della Rocca Maria Luisa France

Graphene / Carbon nanotubes based

nanoelectronics and field emission

Single-wall carbon nanotubes quantum dots fabricated by controlled electromigration Senior

Fernandez Martin Eduardo Spain


materials Nanostructured GMI multilayers deposited onto flexible substrates for low pressure sensing Student

Ferrer-Anglada Nria Spain



Flexible Transparent Electrodes Using Carbon Nanotubes Senior

Alphabetical Order (92)


Gaztelumendi Idoia Spain


materials Self-Sensing behaviour in glass fiber based epoxy laminates using MWCNT Senior

Gelinsky-Wersing Dagmar Germany Nanobiotechnologies Nanoporous impedimetric fibre sensor for the detection of acute inflammation in wounds Student

Gmez Sacha Spain Theory and modelling at the

nanoscale On the use of Artificial Neural Networks in Electrostatic Force Microscopy Senior

Gmez-Navarro Cristina Spain



Discriminating chemically derived graphene conductivity through Electrostatic Force Microscopy Senior

Gong Hao Singapore


materials

The study of indium zinc oxide, a material that can combine with porous silicon to form white light emitting diodes Senior

Gonzlez Orive Alejandro Spain


materials

Electrochemical Synthesis and Delivery of Melanin Covered Gold Nanoparticles and Catalytic Activity Student

Guslienko Konstantin Spain Nanomagnetism and

Spintronics

Thermal relaxation and energy barriers near vortex nucleation field in circular permalloy dot arrays Senior

Haberko Jakub Switzerland NanoOptics &

NanoPhotonics Application of 3D laser nanolithography to the fabrication of photonic crystals Senior

Hague James United Kingdom



Tunable graphene bandgaps from superstrate mediated interactions Senior

Hermosa Cristina Spain


Highly electrical conductive, ultralarge and well-ordered MMX nanorods Student

Hierro Rodrguez Aurelio Spain Nanomagnetism and

Spintronics

Tailoring the magnetization states in thickness modulated NdCo5 films with perpendicular magnetic anisotropy. Student

Jones Gavin United Kingdom



Surface Potential Variations in Graphene Induced by Crystalline Ionic Substrates Student

Kaasbjerg Kristen Denmark

Low dimensional materials (nanowires, clusters, quantum dots, etc.) Phonon-limited mobility in single-layer MoS2 Senior

Kalenczuk Ryszard Poland


materials Advances in magnetic silica nanotubes preparation and characterization Senior

Kang Dae Joon Korea Other

Ferroelectric-gate Field Effect Transistors Based Nonvolatile Memory Devices Using p-type Si Nanowire Conducting Channel Senior

Karamitaheri Hossein Austria



Transport Gap Engineering in Zigzag Graphene Nanoribbons Student

Kiessling Anja Germany


materials SiC formation in carbon nanotubes grown from permalloy catalyst particles Student

Kim Duckjong Korea Other Raman characterization of heat spreading in carbon nanotube film Senior

Kim Duckjong Korea Other High power carbon nanotube heater Senior

Knotek Petr Czech Republic SPM

Utilization of Mechanical Properties Imaging for Detection of Au-nanospheres Used as Biomarkers Senior


Kohout Jaroslav Czech Republic

Nanomagnetism and Spintronics Effects of surface in epsilon-Fe2O3 nanoparticles Senior

Kondov Ivan Germany Theory and modelling at the

nanoscale Integrated Services for Multiscale Materials Modelling and Simulation Senior

Kroes Jaap Switzerland



DFT studies of hydrogenated and defective carbon nanotubes Student

Kvashnin Dmitry Russia



The strong influence of configurations of graphane islands to electronic properties of graphene/graphane mixing structure Senior

Lahoz Fernando Spain NanoOptics &

NanoPhotonics

Time resolved fluorescence characterization of oligo(p-phenylene ethynylene) based metallic nanorods. Senior

Langecker Jens Czech Republic Other

9,12-Dithiol-1,2-dicarba-closo-dodecaborane as building block for ligands for surfaces, nanoparticles and metal complexes Senior

Lebar Bajec Iztok Slovenia Other Two-layer synchronized ternary quantum-dot cellular automata wire crossings Senior

Lee Soo-Keun Korea


materials Carbon Nanoflake/ Tin Oxide Composites Gas Sensors for NH3 Detection Senior

Liu Zunfeng Netherlands Nanobiotechnologies

Single Walled Carbon Nanotubes as a Scaffold to Concentrate DNA for Studying DNA-Protein Interactions Senior

Maciejewska Barbara Poland


materials Size of the single domain magnetite particles and MRI parameters Student

Mahmud Syeda Faria Japan Nanofabrication tools & nanoscale integration

Low energy ion beam fabrication of ultra smooth and sharp AFM nanotips from single crystal diamond rods Student

Manea Florica Romania


materials Silver-functionalized carbon nanofibers composite electrodes for Ibuprofen detection Senior

Martin-Gondre Ludovic Spain Theory and modelling at the

nanoscale Energy dissipation channels in the reflection and adsorption of nitrogen on Ag(111) Senior

Matys Sabine Germany


materials Bio-sensing of arsenic by S-layer-modified gold nanoparticles Senior

Michalska Martyna Poland


materials Dispersion of multiwall carbon nanotubes in aqueous suspensions Student

Mijowska Ewa Poland



Carbon Nanotubes separation techniques efficiency and selectivity. Senior

Miranda Alvaro Spain Theory and modelling at the

nanoscale NH_3 Molecular Doping of Silicon Nanowires in the [112], [110], [100] and [111] directions Senior

Mononen Robert Matias Estonia


materials

Enhanced tensile strength of thick dielectrophoretic carbon nanotube fibers by TiO2 infiltration Student

Naderi Fereshteh Iran NanoChemistry Atomic Structural and electronic properties of some derivatives of C20 Senior

Nikulina Elizaveta Spain Nanofabrication tools & nanoscale integration Electron-beam-induced cobalt deposition Senior


Nowakowska Sylwia Switzerland NanoChemistry

Self Assembly of Acetylene-Appended Porphyrin on Au(111) and cycloaddition of 7,7,8,8-Tetracyano-p-quinodimethane (TCNQ) visualized by Scanning Tunneling Microscopy Student

Nowakowski Jan Switzerland NanoChemistry Assembly of 2D ionic layers by reaction of alkali halides with an organic electrophile TCNQ Student

Pea-Mndez Eladia Mara Spain NanoChemistry Gold (III) and gold nanoparticles interactions with humic acids Senior

Pflipsen Chrystel Belgium Nanomagnetism and

Spintronics

Stability and relaxivity of magnetic particles suspensions improved through a simple structural reorganization Student

Phark Soo-hyon Germany



Scanning tunneling microscopy and spectroscopy on edges of epitaxial graphene/Ir(111) Senior

Phark Soo-hyon Germany



Direct Observation of Electron Confinement in Epitaxial Graphene Nanoislands Senior

Piazzon Nelly France Other Nanocalorimetry: a new way to study explosives Senior

Poly Simon Spain Nanobiotechnologies

Charge specific CdSe/ZnS quantum dots enhance amyloid fibrillization of human insulin protein in physiological conditions Student

Pons Miquel Spain Theory and modelling at the

nanoscale Generation of Coulomb Matrix Elements for the 2D Quantum Harmonic Oscillator Student

Pop Aniela Romania


materials

Copper-decorated carbon nanotubes based composite electrodes for non-enzymatic detection of glucose Senior

Prima Garcia Helena Spain Nanomagnetism and

Spintronics

Prussian Blue Analogue thin films as promising materials of future molecule-based spintronic devices Senior

Puente Antonio Spain


Quantum dot addition energies: magnetic field and interaction screening Senior

Rauwel Erwan Norway NanoOptics &

NanoPhotonics

Unusual photoluminescence of undoped hafnia perovskite nanoparticles synthesized via non-aqueous sol-gel process Senior

Rauwel Erwan Norway


materials

&RQIRUPDOFRDWLQJRIQDQRSRURXV-alumina using Atomic layer deposition: Spinel formation and luminescence induced by rare-earth doping Senior

Remes Adriana Romania


materials

Preparation and application of electrochemical sensor based on Ag-doped synthetic zeolite modified multiwall carbon nanotube electrode for arsenic detection Student

Rezanka Pavel Czech Republic


materials

Application of Bare Gold Nanoparticles in Open-Tubular CEC Separations of Polyaromatic Hydrocarbons Senior

Rodrigues Sean United States NanoOptics &

NanoPhotonics Interaction between dipole emitters and 2D plasmonic nanoparticle arrays Student

Rusz Stanislav Czech Republic


materials

Change of geometry of ECAP channel to increase deformation intensity by SPD process AlMn1Cu alloy Senior

Sabater Piqueres Carlos Spain


Formation of Stable Metallic Nanocontacts by mechanical annealing Student

Sato Yoshiko Japan NanoOptics &

NanoPhotonics

Surface smoothening of single crystal diamond chip by 0.50-3.0 keV Oxygen ion beam for XFEL projection optics Student


Segura Rodrigo Chile


materials Filling carbon nanotube membranes with Pd and TiO2 Senior

Sorokin Pavel Russia



Ultrathin diamond nanofilms as possible two-dimensional insulators for future nanoelectronics Senior

Stassi Stefano Italy


materials

Evaluation of different conductive nanostructured particles as filler in smart piezoresistive composites Student

Tilocca Antonio United Kingdom

Theory and modelling at the nanoscale

Molecular Dynamics models of a bioactive glass nanoparticle Senior

Timusk Martin Estonia Other

Optical properties of high-performance liquid crystal-xerogel microcomposite electro-optical films Student

Torrellas Germn Spain Nanobiotechnologies Twist-radial oscillations resonance effects in double-stranded DNA chains Student

Umemura Kazuo Japan Nanobiotechnologies Comparative study of DNAcarbon nanotube hybrids using atomic force microscopy Senior

Valtr Miroslav Czech Republic SPM Voice coil based scanning probe microscopy Senior

Velzquez Garca Jos Joaqun Spain


Photoluminescence of Ag and Li nanoclusters dispersed in glass host Student

Velzquez Garca Jos Joaqun Spain


materials

Multiphase SiO2-SnO2-LaF3 nanostructured glass-ceramics for simultaneous UV and NIR solar spectrum conversion Student

Veverkov Lenka Czech Republic NanoChemistry

Effect of gold and silver nanoparticles on interactions of porphyrin-brucine conjugates with oxoanions NO3-. H2PO42-, SO42-, ClO3-, ClO4-, HCO3-, ReO4- Student

Villamor Estitxu Spain Nanomagnetism and

Spintronics Optimization of spin injection in Lateral Spin Valves Student

Yokoyama Mami Japan NanoChemistry DFT calculation for OH group around Pd on S-modified Au(111) Student

Zaveta Karel Czech Republic Other

Superparamagnetic transition in nanoparticles of iron oxides Senior

Zhukova Valentina Spain Nanomagnetism and

Spintronics Magnetic and transport properties of granular Co-Cu glass-coated microwires Senior

Zvatora Pavel Czech Republic

Nanomagnetism and Spintronics

Structural and magnetic properties of nanocrystalline lanthanum strontium manganese perovskites Student


Presenting Author Country Poster Title

TOPIC: Carbon Nanotubes Based Nanoelectronics and Field Emission

Della Rocca Maria Luisa France Single-wall carbon nanotubes quantum dots fabricated by controlled electromigration

Ferrer-Anglada Nria Spain Flexible Transparent Electrodes Using Carbon Nanotubes

Gmez-Navarro Cristina Spain Discriminating chemically derived graphene conductivity through Electrostatic Force Microscopy

Hague James United Kingdom Tunable graphene bandgaps from superstrate mediated interactions

Jones Gavin United Kingdom Surface Potential Variations in Graphene Induced by Crystalline Ionic Substrates

Karamitaheri Hossein Austria Transport Gap Engineering in Zigzag Graphene Nanoribbons

Kroes Jaap Switzerland DFT studies of hydrogenated and defective carbon nanotubes

Kvashnin Dmitry Russia The strong influence of configurations of graphane islands to electronic properties of graphene/graphane mixing structure

Mijowska Ewa Poland Carbon Nanotubes separation techniques efficiency and selectivity.

Phark Soo-hyon Germany Scanning tunneling microscopy and spectroscopy on edges of epitaxial graphene/Ir(111)

Phark Soo-hyon Germany Direct Observation of Electron Confinement in Epitaxial Graphene Nanoislands

Sorokin Pavel Russia Ultrathin diamond nanofilms as possible two-dimensional insulators for future nanoelectronics

TOPIC: Low-Dimensional Materials

Amato Filippo Czech Republic

Diamond-Like Carbon (DLC) chemical vapor deposition technology: Characterization of DLC nano-layers and Artificial Neural Networks for process modelling

Hermosa Cristina Spain Highly electrical conductive, ultralarge and well-ordered MMX nanorods

Kaasbjerg Kristen Denmark Phonon-limited mobility in single-layer MoS2

Puente Antonio Spain Quantum dot addition energies: magnetic field and interaction screening

Sabater Piqueres Carlos Spain Formation of Stable Metallic Nanocontacts by mechanical annealing

TOPIC: Nanobiotechnologies

Choi

Seong Soo

Korea

Fabrication and Characteristics of Plasmonic Nanopore on the Pyramid for Ultrafast Genome Sequencing

Choi Seong Soo Korea Dynamical Formation of Plasmonic Nanopore and its Optical Characteristics

Poster Contributions by Topics (92)



Gelinsky-Wersing Dagmar Germany Nanoporous impedimetric fibre sensor for the detection of acute inflammation in wounds

Liu Zunfeng Netherlands Single Walled Carbon Nanotubes as a Scaffold to Concentrate DNA for Studying DNA-Protein Interactions

Poly Simon Spain Charge specific CdSe/ZnS quantum dots enhance amyloid fibrillization of human insulin protein in physiological conditions

Torrellas Germn Spain Twist-radial oscillations resonance effects in double-stranded DNA chains

Umemura Kazuo Japan Comparative study of DNAcarbon nanotube hybrids using atomic force microscopy

Velzquez Garca Jos Joaqun Spain Photoluminescence of Ag and Li nanoclusters dispersed in glass host

TOPIC: Nanochemistry

Abdusalyamova Makhsuda Tajikistan Biosorpsion of antimony, nercury and gold at complex conversion of intractable ores

Naderi Fereshteh Iran Atomic Structural and electronic properties of some derivatives of C20

Nowakowska Sylwia Switzerland

Self Assembly of Acetylene-Appended Porphyrin on Au(111) and cycloaddition of 7,7,8,8-Tetracyano-p-quinodimethane (TCNQ) visualized by Scanning Tunneling Microscopy

Nowakowski Jan Switzerland Assembly of 2D ionic layers by reaction of alkali halides with an organic electrophile TCNQ

Pea-Mndez Eladia Mara Spain Gold (III) and gold nanoparticles interactions with humic acids

Veverkov Lenka Czech Republic

Effect of gold and silver nanoparticles on interactions of porphyrin-brucine conjugates with oxoanions NO3-. H2PO42-, SO42-, ClO3-, ClO4-, HCO3-, ReO4-

Yokoyama Mami Japan DFT calculation for OH group around Pd on S-modified Au(111)

TOPIC: Nanofabrication Tools and Nanoscale Integration

Mahmud Syeda Faria Japan Low energy ion beam fabrication of ultra smooth and sharp AFM nanotips from single crystal diamond rods

Nikulina Elizaveta Spain Electron-beam-induced cobalt deposition

TOPIC: Nanomagnetism and Spintronics

Arias Mediano Jose Luis Spain Design of Maghemite/Poly(D,L-lactide-co-glycolide) Nanoparticles for Magnetic Fluid Hyperthermia

Guslienko Konstantin Spain Thermal relaxation and energy barriers near vortex nucleation field in circular permalloy dot arrays

Hierro Rodrguez Aurelio Spain Tailoring the magnetization states in thickness modulated NdCo5 films with perpendicular magnetic anisotropy.

Kohout Jaroslav Czech Republic Effects of surface in epsilon-Fe2O3 nanoparticles

Pflipsen Chrystel Belgium Stability and relaxivity of magnetic particles suspensions improved through a simple structural reorganization

Prima Garcia Helena Spain Prussian Blue Analogue thin films as promising materials of future molecule-based spintronic devices



Villamor Estitxu Spain Optimization of spin injection in Lateral Spin Valves

Zhukova Valentina Spain Magnetic and transport properties of granular Co-Cu glass-coated microwires

Zvatora Pavel Czech Republic Structural and magnetic properties of nanocrystalline lanthanum strontium manganese perovskites

TOPIC: NanoOptics & NanoPhotonics

Buencuerpo Jeronimo Spain 3D-FDTD Analysis of Absorption Enhancement in Nanostructured Thin Film Solar Cells

Haberko Jakub Switzerland Application of 3D laser nanolithography to the fabrication of photonic crystals

Lahoz Fernando Spain Time resolved fluorescence characterization of oligo(p-phenylene ethynylene) based metallic nanorods.

Rauwel Erwan Norway Unusual photoluminescence of undoped hafnia perovskite nanoparticles synthesized via non-aqueous sol-gel process

Rodrigues Sean United States Interaction between dipole emitters and 2D plasmonic nanoparticle arrays

Sato Yoshiko Japan Surface smoothening of single crystal diamond chip by 0.50-3.0 keV Oxygen ion beam for XFEL projection optics

TOPIC: Nanostructured and Nanoparticle Based Materials

Arias Mediano Jose Luis Spain Magnetite/Chitosan Nanocomposite for Magnetic Gemcitabine Targeting to Cancer

Biedma Ortiz Rafael Spain Biodegradable Magnetic Nanomedicine Based on the Antitumor Molecule Tegafur

Biedma Ortiz Rafael Spain Magnetosomes for Anticancer Therapies based on 5-Fluorouracil

Bursikova Vilma Czech Republic Plasma deposition of nanocomposite protective coatings on polymer substrates

Chapartegui Maialen Spain Multifunctional Layers for Safer Aircraft Composites Structures

Chen Xuecheng Poland Template based synthesis of different mesoporous carbon nanostructures

Fernandez Martin Eduardo Spain Nanostructured GMI multilayers deposited onto flexible substrates for low pressure sensing

Gaztelumendi Idoia Spain Self-Sensing behaviour in glass fiber based epoxy laminates using MWCNT

Gong Hao Singapore The study of indium zinc oxide, a material that can combine with porous silicon to form white light emitting diodes

Gonzlez Orive Alejandro Spain Electrochemical Synthesis and Delivery of Melanin Covered Gold Nanoparticles and Catalytic Activity

Kalenczuk Ryszard Poland Advances in magnetic silica nanotubes preparation and characterization



Kiessling Anja Germany SiC formation in carbon nanotubes grown from permalloy catalyst particles

Lee Soo-Keun Korea Carbon Nanoflake/ Tin Oxide Composites Gas Sensors for NH3 Detection

Maciejewska Barbara Poland Size of the single domain magnetite particles and MRI parameters

Manea Florica Romania Silver-functionalized carbon nanofibers composite electrodes for Ibuprofen detection

Matys Sabine Germany Bio-sensing of arsenic by S-layer-modified gold nanoparticles

Michalska Martyna Poland Dispersion of multiwall carbon nanotubes in aqueous suspensions

Mononen Robert Matias Estonia Enhanced tensile strength of thick dielectrophoretic carbon nanotube fibers by TiO2 infiltration

Pop Aniela Romania Copper-decorated carbon nanotubes based composite electrodes for non-enzymatic detection of glucose

Rauwel Erwan Norway Conformal coatinJRIQDQRSRURXV-alumina using Atomic layer deposition: Spinel formation and luminescence induced by rare-earth doping

Remes Adriana Romania

Preparation and application of electrochemical sensor based on Ag-doped synthetic zeolite modified multiwall carbon nanotube electrode for arsenic detection

Rezanka Pavel Czech Republic Application of Bare Gold Nanoparticles in Open-Tubular CEC Separations of Polyaromatic Hydrocarbons

Rusz Stanislav Czech Republic Change of geometry of ECAP channel to increase deformation intensity by SPD process AlMn1Cu alloy

Segura Rodrigo Chile Filling carbon nanotube membranes with Pd and TiO2

Stassi

Stefano

Italy

Evaluation of different conductive nanostructured particles as filler in smart piezoresistive composites

Velzquez Garca Jos Joaquin Spain Multiphase SiO2-SnO2-LaF3 nanostructured glass-ceramics for simultaneous UV and NIR solar spectrum conversion

TOPIC: Other

Kang Dae Joon Korea Ferroelectric-gate Field Effect Transistors Based Nonvolatile Memory Devices Using p-type Si Nanowire Conducting Channel

Kim Duckjong Korea Raman characterization of heat spreading in carbon nanotube film

Kim Duckjong Korea High power carbon nanotube heater

Langecker Jens Czech Republic 9,12-Dithiol-1,2-dicarba-closo-dodecaborane as building block for ligands for surfaces, nanoparticles and metal complexes

Lebar Bajec Iztok Slovenia Two-layer synchronized ternary quantum-dot cellular automata wire crossings

Piazzon Nelly France Nanocalorimetry: a new way to study explosives



Timusk Martin Estonia Optical properties of high-performance liquid crystal-xerogel microcomposite electro-optical films

Zaveta Karel Czech Republic Superparamagnetic transition in nanoparticles of iron oxides

TOPIC: Scanning Probes Methods

Valtr Miroslav Czech Republic Voice coil based scanning probe microscopy

Knotek

Petr

Czech Republic

Utilization of Mechanical Properties Imaging for Detection of Au-nanospheres Used as Biomarkers

TOPIC: Theory and Modelling at the Nanoscale

Chashchikhin Vladimir Russia Molecular design of a sensor for small analyte molecules based on a dye adsorbed on silica nanoclusters and nanopores

Gmez Sacha Spain On the use of Artificial Neural Networks in Electrostatic Force Microscopy

Kondov Ivan Germany Integrated Services for Multiscale Materials Modelling and Simulation

Martin-Gondre Ludovic Spain Energy dissipation channels in the reflection and adsorption of nitrogen on Ag(111)

Miranda Alvaro Spain NH_3 Molecular Doping of Silicon Nanowires in the [112], [110], [100] and [111] directions

Pons Miquel Spain Generation of Coulomb Matrix Elements for the 2D Quantum Harmonic Oscillator

Tilocca Antonio United Kingdom Molecular Dynamics models of a bioactive glass nanoparticle

Biosorpsion of antimony, mercury and gold at complex conversion of intractable ores

M.N.Abdusalyamova Institute of Chemistry of Tajik Academy of Science, Ajni Str.299/2,734063 Dushanbe, Tajikistan,

[email protected]

With a purpose of new microorganisms extraction, that sorb metals, there was carried out microbiological examination of ore, recieved from this ore concentrates and tails of the lower horizons of Dzhizhikrut deposit. For microorganisms extraction (bacteria, microscopic fungi and actinomycetes) following mediums were used: beef-extract agar (BEA), agarized Ashby medium, Czapek's medium (agarized) and starch-ammonium medium. The method of limiting dilutions was used for quantifying microorganisms. We prepared a suspension of the samples in water, 10 grams of the sample was shaked with 90 ml of sterile water for 5 minutes. There were taken following samples: 1 - Ore initial Sb-3.8%, Hg-0, 4%, Au-2.5g / t:, 2 - Concentrate: 51.5% Sb, 4.1% Hg, Au-6.8g / t, 3-7DLOV6E+JJW$X Among them are found bacteria of the genera Bacillus, Mycobacterium, Azotobacter, Pseudomonas and others. Revealed heterotrophic denitrifying bacteria. Dominated among microscopic fungi the genera of Penicillium, Aspergillus, Chaetomium, Fuzarium. Actinomycetes were mostly representatives of the genus of Streptomyces.3 strains of microscopic fungi and 2 strains of actinomycetes were cleaned in a pure culture. Determination of microscopic fungi allowed us to refer them to Aspergillus niger, Aspergillus terreus, Aspergillus fumigatus, and actinomycetes to the genus Streptomyces. These 5 strains were later used in the antimony and mercury biosorption. For the biosorption of antimony and mercury, it was necessary to grow these cultures of microorganisms to produce biomass.

Acknowledgements This work was supported by International Science & technology Center(ISTC), #Project T-1598

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Optimal ANN architecture with onehidden layer to model DLC deposition.

Correlation between predicted andexperimental elastic modulus values.

In vitroin vivo

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Interfacial Forces in Aqueous Media

Design of Maghemite/Poly(D,L-lactide-co-glycolide) Nanoparticles for Magnetic FluidHyperthermia

Beatriz Prez-Artacho, Visitacin Gallardo, M Adolfina Ruiz, Jos L. AriasDepartment of Pharmacy and Pharmaceutical Technology, University of Granada, Spain.

[email protected]

IntroductionThe interest in using superparamagnetic iron oxide (i.e.., maghemite, -Fe2O3) nanoparticles (NPs) toformulate multifunctional nanoplatforms for biomedical purposes mainly relies in their non-toxic andbiodegradable character, and crystalline structure [1]. Crystallinity assures the superparamagneticbehaviour of the nanomaterial, and it will further determine the excellent response of -Fe2O3 towardsmagnetic gradients which could be used to control the in vivo fate of the nanocomposite (by magneticguidance), allowing the accumulation of the drug/gene dose into the targeted site. Interestingly, theoscillation of the magnetic moment of such NPs under an alternating electromagnetic gradient willtransform them into heaters that could induce a hyperthermia effect against cancer cells [2, 3].The present investigation is focused on the development of a reproducible technique for the synthesis ofmaghemite/poly(D,L-lactide-co-glycolide) (core/shell) NPs. Poly(D,L-lactide-co-glycolide) (PLGA) wasused as the biocompatible and biodegradable matrix where the -Fe2O3 nanocores were embedded.This FDA-approved polymer will be responsible for the vehiculization of the drug/gene dose. Thus, thetherapeutic activity of drug molecules and genes would be significantly enhanced by their incorporationto such magnetic NPs. The coating efficiency of the copolymer around the magnetic cores wasanalyzed by electron microscopy, infrared absorption spectra, and electrical and thermodynamic surfacecharacterizations of the core/shell NPs, as compared to those of the pure nanomaterials. The internalstructure of -Fe2O3/PLGA NPs was characterized by X-ray diffractometry. Finally, the magnetic properties ofthe nanocomposites were investigated to define its magnetic responsiveness, and their heating property(hyperthermia effect) was also analyzed under the influence of an oscillating electromagnetic gradient.Materials and MethodsSuperparamagnetic -Fe2O3 NPs (size 7 nm) were prepared by oxidation of ultrasmall magnetite cores[4]. PLGA NPs were formulated by following a water-in-oil-in-water (w/o/w) double emulsion/solventevaporation methodology [5]. The synthesis procedure of -Fe2O3/PLGA NPs was equal to the onefollowed for the preparation of the pure copolymeric NPs, except that the aqueous solution of surfactantagent also contained -Fe2O3 nanocores (6.25 %, w/v).Mean particle diameter was determined in triplicate by PCS. To confirm the size measurements, thenanocomposites were checked by HRTEM and by SEM. FTIR spectrometry was used for the chemicalcharacterization of the NPs. The characterization of the internal structure of -Fe2O3/PLGA NPs wasachieved by X-ray diffractometry. Surface electrical properties of the NPs were analyzed byelectrophoretic measurements as a function of both pH and KNO3. A surface thermodynamic analysis ofthe NPs was also carried out using a well-known model [6]. The magnetic properties of the NPs weredetermined by using a vibrating magnetometer. Finally, the in vitro heating behaviour of the core/shellNPs in a high frequency alternating electromagnetic gradient (frequency and intensity: 250 kHz and 4kA/m, respectively) was investigated in triplicate at 25.0 0.5 C.Results and Discussion-Fe2O3/PLGA nanocomposites were found to be spherical NPs with an average diameter of 135 nm(polydispersity index: 0.283) (figure 1a). It was clear from these pictures that -Fe2O3 cores weresatisfactorily embedded into a PLGA matrix. The coating efficiency was further analyzed using FTIRspectrometry, and electrical and thermodynamic surface characterization. For instance, theelectrokinetics of the PLGA and -Fe2O3/PLGA NPs were almost indistinguishable, and clearly differentfrom that of -Fe2O3 nanocores (figure 1b). Regarding the thermodynamic analysis, as it is observed inthe figure 1c, the hydrophilic nature of -Fe2O3 was modified and the nanocores become hydrophobic(just like the copolymer) when embedded into the PLGA matrix. The comparison of the diffractogram ofthe core/shell NPs with that of the -Fe2O3 cores confirmed the mineralogical purity of the iron oxide andtheir high crystallinity, even upon complete coating by the copolymer. This is an important property toassure the superparamagnetic character of the nanocores.Regarding the mechanisms through which the iron oxide nanocores are embedded into the copolymericnetwork, some arguments could be given if we keep in mind all the information described about thesurface characteristics of the NPs. Under the synthesis conditions, we may speak of an attractiveelectrostatic interaction between the positively charged -Fe2O3 NPs and the negatively charged PLGAmatrix. This attraction will tend to concentrate the copolymer in the vicinity of the iron oxide surface.

Thermodynamic arguments could also be given: it was determined that the van der Waals and acid-base interactions between -Fe2O3 and the copolymer were neatly attractive. Thus, it would bethermodynamically favorable for the PLGA matrix to remain in contact with the nanocores rather than asisolated entities in water.The magnetic responsiveness and soft magnetic character of the core/shell NPs were determined bythe hysteresis cycle. From the linear portions (low field) of the curve we could estimate the initialsusceptibility ( i 2.5) and the saturation magnetization ( 206 kA/m). Figure 1d shows the in vitroheating behaviour of a core/shell aqueous magnetofluid in a high frequency alternating electromagneticgradient. Under the experimental conditions, the oscillation of the magnetic moment of the -Fe2O3/PLGA NPs transformed them into heaters. As a result, the temperature of the magnetofluid rosefrom room temperature to the minimum hyperthermia temperature ( 41 C) in 25 min. Interestingly, ithas been described that locally heating at this temperature a tumor mass for 30 min is enough todestroy it [3]. Thereafter, the maximum temperature reached 47 C after 45 min, being then stabilizeduntil the end of the experiment. Hence, the data proves a good control of the temperature and heat flux,a basic requirement for hyperthermia taking into account that when the temperature rises > 48 C,healthy cells surrounding the tumor tissue are expected to be burn and damaged [2].ConclusionsIt has been described a reproducible method for preparing magnetically responsive nanocompositesconsisting of maghemite nanocores embedded into a poly(D,L-lactide-co-glycolide) matrix. Theefficiency of the synthesis procedure is demonstrated by electron microscope analysis, physicalchemistry data, and by comparing the thermodynamic and electrophoretic surface properties of thecore/shell NPs with those of their components. These nanocomposites may constitute a potentialcandidate for therapeutic applications, e.g., cancer treatment: they could be tailored to deliverappropriate amounts of a chemotherapy agent specifically into the tumor cells, in combination with aselective hyperthermia effect into the malignant tissue.AcknowledgmentFinancial support from projects GREIB-PYR 2011-1 (Granada Research of Excellence Initiative onBioHealth, Spain) and PE2008-FQM-3993 (Junta de Andaluca, Spain) is acknowledged.References[1] Weissleder R, Bogdanov A, Neuwelt EA, Papisov M. Adv. Drug Deliv. Rev. 16 (1995) 321.[2] Gonzales M, Krishnan KM. J. Magn. Magn. Mater. 293 (2005) 265.[3] Huber DL. Small 1 (2005) 482.[4] Bee A, Massart R, Neveu S J. Magn. Magn. Mater. 149 (1995) 6.[5] Czar-Bernal MJ, Holgado MA, Arias JL, Muoz-Rubio I, Martn-Banderas L, lvarez-Fuentes J,

Fernndez-Arvalo M. J. Microencapsul. 28 (2011) 430.[6] van Oss CJ. Interfacial Forces in Aqueous Media, 2nd ed., CRC Press, Boca Raton, USA, 2006.Figures

Figure 1. (a) HRTEM picture of -Fe2O3/PLGANPs (Inset: SEM photograph of the NPs). (b)Zeta potential ( , mV) of -Fe2O3

-Fe2O3 NPs as a functionof KNO3 concentration at pH 4. (c) Solid-liquidinterfacial energy of interaction ( GSLS,mJ/m2) and hydrophobic/hydrophilic characterof -Fe2O3, PLGA, and -Fe2O3/PLGA NPs.(d) Heating curve of a -Fe2O3/PLGAmagnetofluid (10 mg/mL) exposed to anoscillating electromagnetic gradient.

in vitro

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Interfacial Forces in Aqueous Media

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3D-FDTD Analysis of Absorption Enhancement in Nanostructured Thin Film Solar Cells

J. Buencuerpo, M.L. Dotor, L.E. Muoz and P.A. PostigoIMM-Instituto de Microelectrnica de Madrid (CNM-CSIC), Isaac Newton 8, PTM,

E-28760 Tres Cantos, Madrid, [email protected]

Summary:Abstract: We investigate 1D-2D photonic crystals for light absorption enhancement on thinfilm photovoltaics (Si, GaAs and InP) by FDTD. A comparison with RCWA and TMM ispresented. The absorption is increased substantially for these systems.OCIS codes: (160.5298) Photonic crystal; (310.6845) Thin film devices and applications;(040.5350) Photovoltaic.

IntroductionThin film solar cells solar cells made out of either inorganic/organic material are of an increasing importance.

Despite of their small thickness they can be optimized in order to efficiently use the incident light to improveabsorption. Nanostructuration of the surface in form of a periodic pattern like a photonic crystal has beendemonstrated to improve them [1]. Nevertheless, a deep understanding on what are the physical mechanisms forthe improvement is needed. In order to obtain a deeper insight on these mechanisms, we have developed aroundthe free available software MEEP [2] to model the optical properties of nanostructured solar cells includingphotonic crystal structures. Three dimensional FDTD simulations have been used to calculate the opticalabsorption, transmission and reflection on such systems. Comparison with other methods like RCWA and TMMhas been also performed.Results

The main advantages of using FDTD codes for the modeling of nanostructured solar cells are its rigoroussolutions and a higher flexibility for the design of structures. Our calculations have been compared with thetransfer matrix method (TMM) [3] and the rigorous coupled wave analysis (RCWA) [4], [5] showing compatibleresults. We have studied nanostructured materials in 1D (nanorods) and in 2D (nanopillars) forming a square -lattice photonics crystals, with and without an underlying substrate. Analysis with the polarizations (S-P andpseudo-unpolarized ) and with the angle of incidence has been also evaluated.

The materials are simulated realistically using a complex variable refraction index over frequency.Thicknesses between 100 nm and 1000 nm are studied for crystalline silicon, amorphous silicon, galliumarsenide and indium phosphide. Optical absorption (A=1-R-T) is calculated using monitors for transmission andreflection. As an example, a typical surface-nanostructured layer with a 2D photonic crystal is shown in Fig. 1.The structure in this case is composed of a silicon amorphous substrate with a thickness of 150 nm withnanopillars 150 nm tall. It is compared with the same structure without photonic crystal with a thickness of 300nm thick and including an anti-reflective coating (ARC) 70 nm thick. There is an improvement in the absorptionof the nanopatterned structure despite the mass of absorbing material is only a 60% of the structure withoutnanostructuration. Absorption is normalized to a perfect absorbing system. For most of the energies of normallyincident light the nanopillar photonic crystal surface increases the absorption around a 5% in respect to the samestructure without photonic crystal but with an ARC.

References[1] , and I. Rey-Stolle, Applied Physics Letters, vol. 94, no. 19, p. 191102,2009.[2] A. F. Oskooi, D. Roundy, M. Ibanescu, P. Bermel, J. D. Joannopoulos, and S. G. Johnson, Computer Physics Communications, vol. 181,

no. 3, pp. 687-702, Mar. 2010.[3] C. Lin and M. L. Povinelli, Optics Express, vol. 17, no. 22, pp. 19371-19381, Oct. 2009.[4] Y. Park et al., Optics Express, vol. 17, no. 16, pp. 14312-14321, 2009.[5] S. Zanotto, M. Liscidini, and L. C. Andreani, Optics Express, vol. 18, no. 5, pp. 4260-4274, Mar. 2010.

Fig. 1. Absorption of the structure shown in the inset (i. Substrate 300 nm with anti-reflective coating d=70nm and metal layer ii. A squarelattice of nanopillars with lattice parameter a=450 nm and diameter d=225 nm).

(Contribution Poster)

Plasma deposition of nanocomposite protective coatings on polymer substratesV. Bursikova1, J. Lukes2, J. Havel1, J. Houska1, A. Stoica1, V. Mocanu1

1Faculty of Science, Masaryk University, Kotlarska 2, 61137 Brno, Czech Republic2 Praha 6, Czech Republic

[email protected] is a continuing interest in improving methods for deposition of hard coatings having still greaterabrasion resistance while also exhibiting improvements in various other physical properties. It istherefore an object of the present work to provide a method for forming protective coatings on thesurfaces of plastics such as polycarbonates, having a high level of abrasion resistance, with improvedresistance against cracking under exposure to thermal and mechanical stresses. Plasma-chemicalmethods are generally using a mixture of hard-coating precursors (e.g. organosililicon or organosilazanemixtures with oxygen in the case of transparent coatings) in a high-frequency or corona discharges anddepositing the product directly on a plastic substrate as a very thin film. Using this method, thin filmswith a wide range of mechanical properties can be produced from hard inorganic SiO 2-like to softpolymerlike SiOxCyHz films properties just varying the plasma conditions. Moreover, under specificconditions films with special structures, such nanocomposite SiOCH or nanocomposite SiO2-containingdiamond-like carbon films may be prepared [1-3].The main objective of the present work was to prepare protective films from hexamethyldisiloxane(C6H18Si20- HMDSO) oxygen mixtures. These types of films are of particular interest in variousapplications because they exhibit a number of desirable properties: good adherence to polymersubstrates, relatively high deposition rate, good transparency to visible radiation, goodthermomechanical stability etc. The studied films were prepared by plasma enhanced chemical vapourdeposition (PECVD) from HMDSO and oxygen with oxygen-to-HMDSO flow rate ratio (q=QO2/(QHMDSO+QO2)) ranging from 0 to 0.95. The substrates were silicon wafers, glass and polycarbonate plates.Capacitive r.f. discharges (13.56 MHz) were generated in a parallel plate reactor . The HMDSO flow rateQHMDSO varied from 3 to 10 sccm, the oxygen flow rate was varied from 0 to 20 sccm. The workingpressure was in the range from 1 to 40 Pa depending on q. The applied power P was varied from 50 to150 W and the negative bias voltage was in the range from 10 to 300 V.The optical properties of the films were studied using ellipsometer. The composition of the films wasstudied by FTIR, RBS and ERDA techniques. The instrumented indentation technique was used tostudy the mechanical properties of the films. The morphology of the film surface and the indentationprints was studied by means of Zeiss-Neophot optical microscope, a Nicon SMZ - 2T optical stereo-microscope, a Philips SEM 505 scanning electron microscope and by AFM. The surface energy of thedeposited films was calculated from contact angle measurement using See System. Time of flight massspectrometer equipped with nitrogen laser (337 nm) was used to characterize nanocomposite layerscomposition via laser desorption ionization (LDI) and/or laser ablation. The stoichiometry of positively ornegatively charged species was confirmed via isotopic pattern simulation. The mass spectra of testedmaterial obtained show mainly carbon spectral patterns similar to other carbon-containing materialssuch as diamond, carbon nanotubes, diamond like carbon, etc. but also several other positively ornegatively charged OmSinCoHp species were observed.Inorganic hard-coatings such as silicon dioxide (SiO2) deposited directly onto plastics such aspolycarbonate have performance problems when the system is subjected to stresses produced bymechanical or thermal effects. These problems are due to the difference in property characteristics ofinorganic and plastic materials. We overcame these difficulties developing a very elastic film withnanocomposite character. In Figure 1 there is an example of loading-unloading dependence obtainednanoindentation test. We can see, that the tested film exhibited almost fully elastic behavior, at relativelyhigh indentation depth there was almost no plastic deformation.The deposition conditions suitable for nanocomposite film preparation were achieved due to relativelyhigh HMDSO to oxygen flow rate ratio, which led to the creation of dusty plasma because of therelatively low applied power. The fragmentation of HMDSO molecules during this deposition processwas low. The dissociative ionization of the HMDSO molecule and the electron attachment, followed byconsecutive ion-neutral reactions led to the creation of high mass anions. These anions were trapped inthe plasma and homogeneous reactions finally caused a growth of solid amorphous particles whichwere incorporated into the growing amorphous SiOxCyHz film. The composite character of the producedfilm improved its mechanical stability, however the particles embedded in the amorphous SiOxCyHzmatrix increased little bit the film roughness as it can be seen on the Figure 2, were an example of AFM

image of the sample surface is shown. The surface energy studies showed that the films havehydrophobic and under optimum plasma conditions even ultrahydrophobic properties.

Acknowledgement: The work was supported by the Czech Science Foundation (Project No.202/07/1669), MSM contract 0021622411, Academy of Science of the Czech Republic and OP R&DICZ.1.05/2.1.00/03.0086.References[1] L. Martinu, Plasma Pr al. Kluwer Academic Publisher(1997) 247.

- Surface &coatings technology, 142-144, ( 2001) 449.[3] A.S.S. Sobrinho, N. Schhler, J.E. Klemberg-Sapieha, M.R. Wertheimer, M. Andrews and S.C.Gujrathi J. Vac. Sci. Technol. A. 16(4), (1998).

Figures

Figure 1 Examples of force-displacement curves obtained using nanoindentation with maximum forceof 0.3 mN. themechanical properties of the sample VI49.

Figure 2 Example of SPM image of the film surface (sample VI49) with sub region roughness analysisindicated by the red square.

Multifunctional Layers for Safer Aircraft Composites StructuresM. Chapartegui, A. Iriarte, C. Elizetxea

Tecnalia, Mikeletegi 2 E-20009, San Sebastian, [email protected]

The objective of the present work is to develop an electrical-thermal conductive material to be used as aheating layer in aircraft ice protection systems. For this purpose, a nanocomposite layer consisting of apolymeric matrix doped with carbon nanotubes (CNT) is developed, which afterwards will beincorporated in the manufacturing process of composite parts. Two alternatives are studied,incorporating different concentrations of multi-walled carbon nanotubes (MWCNT) into epoxy andbenzoxazine resins: benzoxazine/MWCNT nanocomposites and epoxy/MWCNT-buckypapernanocomposites.The materials used for the manufacturing of benzoxazine/MWCNT nanocomposites are AralditeMT35600 benzoxazine resin from Huntsman and Graphistrength C100 multi-walled carbon nanotubesfrom Arkema. The manufacturing process consists of two main steps: in the first step, MWCNTs aredispersed in benzoxazine resin by means of extrusion with a co-rotating twin-screw extruder; in asecond step, the benzoxazine/MWCNT blend is hot-pressed and cured to obtain the nanocompositefilm. The MWCNT content of this nanocomposite is 10 wt.%.For the development of epoxy/MWCNT-buckypaper nanocomposites, first a MWCNT buckypaper ismanufactured by filtering a nanotube suspension. Graphistrength U100 multi-walled carbon nanotubesfrom Arkema are used and a 245 buckypaper is obtained. In asecond step the buckypaper is infiltrated with epoxy resin in autoclave, using the MTM44-1 epoxy resinfilm from Advanced Composites Group. A nanocomposite film 40 wt.% MWCNT is obtained.Electrical conductivity and electrothermal heating tests are carried out to evaluate the efficiency of themanufactured nanocomposites as a heating layer. The electrical conductivity is measured using the Vander Pauw four probe method [1-2]. The results reveal that the electrical conductivity of thebenzoxazine/MWCNT nanocomposites is in the range of 0.13 to 0.57 S/cm, whereas the electricalconductivity of the epoxy/MWCNT-buckypaper nanocomposites is in the range of 5.2 to 23 S/cm.Therefore, the electrical conductivity of the epoxy/MWCNT-buckypaper nanocomposites is at least oneorder of magnitude higher than that of the benzoxazine/MWCNT nanocomposites.Electrothermal heating tests are performed at room temperature and at -25 C. The temperature ismeasured in four points of the specimen using K type thermocouples. In addition, during roomtemperature tests, an infrared camera is used to capture the distribution of temperatures. The test isperformed as follows: an electric current is applied to the specimen, so the temperature startsincreasing. When a temperature increase of 35 C is reached, the current is switched off. As can beseen in Figure 1, similar heating rates are observed at -25C and at room temperature. Thephotographs obtained with the infrared camera and the graphs obtained with the thermocouples revealthat the heat distribution is significantly better for epoxy/MWCNT-buckypaper nanocomposites.

AcknowledgementsThis work has been carried out within the European Project ACP7-GA-2008-21367,Layers for Safer Aircraft Composites Structures-

References[1] Rosca, I.D, Hoa S.V, Carbon, 47 (2009) 1958-1968.[2] Weiss J.D, Kaplar R.J, Kambour K.E, Solid-State Electron, 52 (2008) 91-98.

Figures

a) b)Figure 1. Results of electrothermal heating tests: a) benzoxazine/MWCNT nanocomposites, b)

epoxy/MWCNT-buckypaper nanocomposites.

020406080

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020406080100120140160180200

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T= -25C

Molecular design of a sensor for small analyte molecules based on a dye adsorbed on silicananoclusters and nanopores

Vladimir Chashchikhin, Elena Rykova, Alexander BagaturyantsPhotochemistry Center, ul. Novatorov 7a b.1, Moscow, Russia

[email protected] (QC)/molecular dynamics (MD) studies of the interaction of various compoundswith fluorescent dyes adsorbed on amorphous silica surfaces are quite important in the design ofoptical chemical sensors based on adsorbed dyes. Such sensors were proposed for thedetermination of small molecules by changes in the optical signal (absorption or luminescencespectrum) of a receptor centre (adsorbed dye) upon its interaction with various analytes [1]. QC andMD calculations for such systems can provide an atomic -scale insight into the structure andproperties of the receptor centre. The computational results can be used to predict structures;adsorption energies; and changes in the positions, inten sities, and widths of spectral bands of areceptor centre interacting with analyte molecules. We considered a set of both polar and non-polarcompounds comprising acetone, ammonia, methanol, ethanol, water, benzene, naphthalene,toluene, and dinitrotoluene. These molecules can form complexes with corresponding sensingcomponents of the sensitive layer (receptor centre). The resulting changes in the absorption orfluorescence spectra provide an output signal of the sensor, so that even rather low concentrationsof analytes can be detected [2].As the indicator dye in this study we used 9-(diphenylamino)acridine (DPAA) adsorbed on a silicasubstrate, for which we chose different cluster [3] and nanopore models with a diameter from one toseveral nanometres. Silica clusters were built by MD simulations [4]. To do this, an amorphousSiO2 structure was obtained by simulated annealing of the alpha quartz crystal structure, afterwhich cluster and porous SiO2 structures were cut off from the obtained amorphous struc tuers. Weoptimised the structures of DPAA/silica/analyte complexes and estimated the interaction energiesbetween the adsorbed dye and analyte molecules and between the dye and the silica surface usinga QC DFT-D approach with the PBE0+D functional, including explicit corrections for vdW forces.One of the optimized structures consisting of DPAA, Si10O11(OH)18 (Si10) and ethanol is shown inFigure 1.To determine the effect of silica gel porous surface irregularities on the receptor centre properties,we built model nanopores of different radii. The adsorption of the dye was simulated using geneticalgorithms [5]. Next, after cutting off a structure suitable for QC calculations, dye adsorptionenergies were calculated. The interaction energy of the dye in pores of the lowest investigateddiameter reach a maximum value (40 42 kcal/mol, D ~ 1 nm) and decreases with increasing poresize. For pores with a diameter greater than 3 nm, the interaction energies do not differ from similarresults for cluster models (25 30 kcal/mol). The construction process is illustrated in Figure 2.The electronic absorption and fluerescencse spectra of molecular complexes were determined bythe vertical electron transition energies at the equilibrium geometries of complexes in the groundand excited electronic states. We calculated the positions of the 1st absorption and fluorescencebands in the systems DPAA/silica/analytes and the system without analytes by TDDFT method(PBE0/6-31G**(cc-pVTZ)) [6] and evaluated the displacements of spectra, whose values determinethe efficiency of the detecting device. The calculated band shifts are shown in Figure 3.Another important characteristic of the optical response of a chemical sensor is the shape and the widthof the corresponding electronic band. The spectra of adsorbed substances exhibit no rotationalstructure; therefore, taking into account the vibrational structure should be sufficient in our case.One of the most convenient first-principles approaches to calculating the band shapes in the electronicspectra of complex molecular systems is based on the classical Pekar model [7]. In this model, eachelectronic transition is broadened into a structureless band of an approximately Gaussian shape due tolinear vibronic coupling. In practice, only a single-point evaluation of the excited state gradient isrequired in this approach. The following data are required from the ground state calculations: equilibriumgeometry, nuclear Hessian, harmonic frequencies, and normal modes. These data are calculated by QCmethods, such as DFT, DFT-D and TDDFT. The results of calculations of the bands are in goodagreement with the experimental data for DPAA in solutions, which leads to the conclusion that thedeveloped approach can be used for the estimation of the shapes of spectral bands in the absorptionspectra of organic dyes adsorbed on silica particles and their complexes with analytes. This offers newpossibilities for the design of optical chemical sensors on the basis of such systems. The proposedprocedure can be used for the preliminary screening of materials (dye + substrate) as receptor centersfor optical chemical sensors. It is shown that the DPAA/silica receptor centre can be used to detectcompounds in a gas phase by changes in fluorescence and absorption spectra.References

[1] C. McDonagh, C.S. Burke, and B.D. MacCraith, Chem. Rev., 108 (2008) P. 400 422.[2] de Silva A.P., Chem. Rev., 97 (1997) P. 1515 1566.[3] V. Chashchikhin, E. Rykova, and A. Bagaturyants, PCCP., 13 (2011), P. 1440 1447.[4] Feuston B. P. and Garofalini S. H.,Chem. Phys. Lett., 170 (1990), P. 264 270[5] Grigoriev F.V. et. al., Nanotech. in Russ., 5 (2010), P. 290 298.[6] V. Chashchikhin, E. Rykova, and A. ., Nanotech. in Russ., 6 (2011), P. 579 586[7] S. I. Pekar, Usp. Fiz. Nauk, 1953, P. 197 252.[8] V. Chashchikhin, E. Rykova, A. Scherbinin, A. Bagaturyants and M. Alfimov, submitted, Jan. 2011

Figure 1. Structure of complexes C2H5OH DPAASi10. Silicon atoms are given by brown circles;oxygen, by pink; hydrogen, by blue; carbon, byyellow; and nitrogen, by sea-green circles

Figure 3. Band shift of fluorescence (dark blue) andabsorption (light purple) spectra of complexDPAA/silica/anaytes corresponded to DPPA/silicasystem

Figure 2. Stages of modeling complex dye in the pores of the amorphous silica gel: 1) Annealing ofalpha quartz, 2) Cutting cylindrical pores (h = 2 nm, R1 = 0.7 .. 1.5 nm, R2 = 1 .. 1.8 nm); 3) adsorptionof the dye, calculations with using a genetic algorithm and the MD methods; 4) Finding the structurecomprising all atoms at a distance from the dye no more than 0.3 nm and subsequent geometryoptimization by QC method

Figure 4. Band shapes for complexes (a) analyte DPAA SiH3OH, (b) analyte DPAA Si10 (black line,DPAA Si1(10); red line, complex with ammonia; green line, complex with ethanol; blue line, complexwith acetone) and (c) experimental spectrum of DPAA solution in methanol (dark green line) andcalculated spectra of isolated DPAA (violet line) and DPAA Si10 complex (black line).

Template based synthesis of different mesoporous carbon nanostructuresX. C. Chen, K. Cendrowski, J. Srenscek-Nazzal, R. J. Kalenczuk, Ewa Borowiak-Palen

West Pomarina University of Technology, Szczecin, 70-322, [email protected]

Different mesoporous carbon nanomaterials were produced from mesoporous silica templates. In thismethod, mesoporous carbon nanotube, mesoporous carbon flowers and mesoporous hollow carbonspheres were synthesized with different diameters through CVD reacton in a controlled manner. Inthese reactions, CTAB was served as carbon seeds for the carbon growth during CVD process. Thepotential applications such as Lithium ion battery and supercapacitor properties for the mesoporouscarbon structures were also studied. The samples have been innestigated via high resolutiontransmission electron microscopy with EDX, X-Ray Diffraction and BET analysis.References[1] X.C. Chen, K. Cendrowski, J. Srenscek-Nazzal, M. H. Rmmeli, R. J. Kalenczuk, H.M. Chen, P. K.

Chu, E. Borowiak-Palen: Colloids and Surfaces A: Physicochemical and Engineering Aspects 377(2010), 150.

[2] S. B. Yoon, J.Y. Kim, J. H. Kim, Y. J. Park, K. R. Yoon, S.K. Park, J.S. Yu: J. Mater. Chem. 17 (2010)1758.[3] X.C. Chen, K. Kierzek, Z.W. Jiang, H.M. Chen, T. Tang, M. Wojtoniszak, R. J. Kalenczuk, P. K. Chu,E. Borowiak-Palen, J. Phys. Chem. C. 115 (2011), 17717.Figures

Fabrication and Characteristics of Plasmonic Nanopore on the PyramidFor Ultrafast Genome Sequencing

Seong Soo Choia, T. Yamaguchib, M.J. ParkcaDepartment of NanoScience, SunMoon University, Ahsan, Chungnam, 336-708 Korea;bUniversity Instrument Center, SunMoon University, Ahsan, Chungnam

cDepartment of Physics, Korea Military Academy, Seoul,139-799 Korea:[email protected]

Recently there have been tremendous interests about the nanopore technology due to urgent demandsof the ultrafast DNA sequencing device with less than 24 hour diagnosing time and less than $1000demands by NIH, USA. DNA translocation through a natural hemolysin nanopore with electrical signaldetection scheme has been successfully carried out by Dr. Bayley and et al [1, 2]. The solid-statenanopore array using SiN and graphene has also been tried to provide the DNA footprints by others.However, the optical detection technique such as SERS can better characterize the DNA. In this report,the optical characteristics of the nanofabricated plasmonic nanopore with its diameter less than 10 nmwill be presented. Initially, the oxide aperture was fabricated followed by metal deposition. The metalaperture slit ranging from ~ 100 nm width to 102 nm is obtained. Figure 1 shows the differences of thesurface morphology of the FESEM from those of 200 keV TEM due to the nonuniform cylindrical wall.The 5keV FESEM imaging and 200 keV TEM images present the nonuniform structure of thenanopores. In order to get the uniform cyldrical wall of the nanopore, the 30 keV Focused Ga ion beam(FIB) drilling is introduced and the Au diameter of ~50 nm was obtained. In order to better control thesize reduction of nanopore less than 10 nm, the electron beam annealing technique is introduced. Thepore diameter of ~5 nm or less is obtained using 20 keV electron beam exposure. The probe diameterof the Hitachi S 4800 Type II FESEM is ~ 1 nm and has a maximum current of ~ 2 nA. The temperaturerise due to electron beam exposure is linearly dependent upon the electron energy and the current, andinversely proportional to thermal conductivity of the materials [3]. The successive size reduction of thenanopore was also observed for 200 keV using JEOL 2010 TEM [Fig. 2]. [Fig.3]. This can be atributedto melting of the Au membrane due to electron beam heating effect. In addition, the opticalcharacteristics of the fabricated Au nanopore were measured using Nikon TE inverted microscope withtungsten halogen lamp and Princeton instrument/Acton (Pixie:400, spectroscopic-format CCD). Theincreasing optical transmittance with decreasing the nanopore size is shown in Fig.4. This extraordinarytransmission can be attributed to the optical vortexed photonic flow into the decreasing Aunanoaperture[4]. The nanofabricated device can be utilized as single molecule nanobio sensor andgenome sequencing.

References[1] G. Maglia, et al, Nature Nanotechnology 4, 437(2009).[2] Cees Dekker and et al, Nature Nanotechnology 2, 209 (2007).

Application of electron probes to local chemical and crystallographic analysis , Ph.D.thesis, University of Paris, June 8, 1951.[4] H. F. Schouten, T.D. Visser,, D. Lenstra, H. Blok, Phy.Rev. E 67, 036608(2003)..

AcknowledgementsThis work has been supported by the Korean Research Foundation under the National ResearchLaboratory Project, GRL Project (Nanophotonic Integrated Circuits for Ultrafast Processing, K-20815000003), and Science Research Center project (Center for Subwavelength Optics).

Figures:

Figure 1. Nanopore images of the samples. The images of the 5 keV SEM for the samples AO5 andA10 does present different images from the images of 200 keV TEM images. This phenomena can beattributed to the nonuniform cylindrical structure of the nanopore, and the different sampling depth fordifferent electron energy of FESEM, and due to the different imaging technique of TEM from that of theSEM.

Figure 2. Dynamic sequence of nanopore closing using electron beam exposure with 200 keVTEM.(Jeol 2010).

Figure 3.. Optical transmittance spectra through the Au nano-channel on the pyramid. With decreasingthe size from 6830, 580, and 20 nm2, the peak transmittance has been increased to 252, 3780, and13483, respectively. The peak position was also shifted.from input peak 678 nm to output peak 550 nmdue to surface plasmon resonance.

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Dynamical Formation of Plasmonic Nanopore and its Optical CharacteristicsFor Ultrafast Genome Sequencing

Seong Soo Choia, T. Yamaguchib, M.J. Parkc, N.K. Parkd, D.S. KimeaDepartment of NanoScience, SunMoon University, Ahsan, Chungnam, 336-708 Korea;bUniversity Instrument Center, SunMoon University, Ahsan, Chungnam

cDepartment of Physics, Korea Military Academy, Seoul,139-799 Korea:dSchool of Electrical engineering, Seoul National University, Seoul, KoreaeSchool of Physics and Astronomy, Seoul National University, Seoul, Korea

[email protected], [email protected] there have been tremendous interests about the nanopore technology due to urgent demandsof the ultrafast DNA sequencing device with less than 24 hour diagnosing time and less than $1000demands by NIH, USA. DNA translocation through a natural hemolysin nanopore with electrical signaldetection scheme has been successfully carried out by Dr. Bayley and et al [1, 2]. The solid -statenanopore array using SiN and graphene has also been tried to provide the DNA footprints by others.However, the optical detection technique such as SERS can better characterize the DNA. In this report,the dynamical sequence of the nanopore formation with video-imaging and the optical characteristics ofthe nanofabricated plasmonic nanopore will be presented. Initially, the oxide aperture was fabricatedfollowed by metal deposition. The metal aperture slit ranging from ~ 100 nm width to 102 nm is obtained.Figure 1 shows the differences of the surface morphology of the FESEM from those of 200 keV TEMdue to the nonuniform cylindrical wall. The 5keV FESEM imaging and 200 keV TEM images present thenonuniform structure of the nanopores. In order to get the uniform cyldrical wall of the nanopore, the 30keV Focused Ga ion beam (FIB) drilling is introduced and the Au diameter of ~50 nm was obtained. Inorder to better control the size reduction of nanopore less than 10 nm, the electron beam annealingtechnique is introduced. The pore diameter of ~5 nm or less is obtained using 20 keV electron beamexposure. The probe diameter of the Hitachi S 4800 Type II FESEM is ~ 1 nm and has a maximumcurrent of ~ 2 nA. The temperature rise due to electron beam exposure is linearly dependent upon theelectron energy and the current, and inversely proportional to thermal conductivity of the materials [3].The widening and the reduction of the nanopores depending upon the electron fluences were alsoobserved and videorecorded during 300 keV electron beam exposure. The successive size reduction ofthe nanopore was also observed for 200 keV using JEOL 2010 TEM [Figure 2]. These can be attributedto melting and evaporation of the Au membrane dependent upon the temperature from electron beambombardment on the Au membrane. In addition, the optical characteristics of the fabricated Aunanopore were measured using Nikon TE inverted microscope with tungsten halogen lamp andPrinceton instrument/Acton (Pixie:400, spectroscopic-format CCD). The increasing optical transmittancewith decreasing the nanopore size is shown in Figure 3. The extraordinary transmission can beattributed to the optical vortexed photonic flow into the decreasing the size of the Au nanoaperture[4, 5].The nanofabricated device can be utilized as single molecule nanobio sensor and genome sequencing.

References[1] G. Maglia, et al, Nature Nanotechnology 4, 437(2009).[2] Cees Dekker and et al, Nature Nanotechnology 2, 209 (2007).

Application of electron probes to local chemical and crystallographic analysis Ph.D.thesis, University of Paris, June 8, 1951.[4] H. F. Schouten, T.D. Visser,, D. Lenstra, H. Blok, Phy.Rev. E 67, 036608(2003)..[5] M.A. Seo, DaiSik Kim, et al, Nature Photonics 3, 156(2009).

AcknowledgementsThis work has been supported by the Korean Research Foundation under the National ResearchLaboratory Project, GRL Project (Nanophotonic Integrated Circuits for Ultrafast Processing, K-20815000003), and by the National Research Foundation grant (Science Research Center project ,2010-0005839).

Figures:

Figure 1. Nanopore images of the samples. The images of the 5 keV SEM for the samples AO5 andA10 does present different images from the images of 200 keV TEM images. This phenomena can beattributed to the nonuniform cylindrical structure of the nanopore, and the different sampling depth fordifferent electron energy of FESEM, and due to the different imaging technique of TEM from that of theSEM.

Figure 2. Dynamic sequence of nanopore closing using electron beam exposure with 200 keVTEM(Jeol 2010).

Figure 3. Optical transmittance spectra through the Au nano-channel on the pyramid. With decreasingthe size from 6830, 580, and 20 nm2, the peak transmittance has been increased to 252, 3780, and13483, respectively. The peak position was also shifted.from input peak 678 nm to output peak 550 nmdue to surface plasmon resonance.

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Single-wall carbon nanotubes quantum dots fabricated by controlled electromigrationM.L. Della Rocca, P. Petit, C. Feuillet-Palma, C. Sirtori, P. Lafarge

Laboratoire Matriaux et Phnomnes Quantiques, Universit Paris Diderot-Paris 7,UMR 7162 CNRS

75205 Paris Cedex 13, [email protected]

The study of electronic transport in single molecule junctions faces the great difficulty to place a singlesynthesized molecule between two metallic electrodes. Single-wall carbon nanotubes are giantmolecules which can be much more easily manipulated in order to study transport at nanometric scale[1,2]. In this work, we present a new method to fabricate single-wall carbon nanotube (SWNT) quantum dotby a controlled electromigration procedure [3,4]. This offers the possibility to investigate an ultrasmallsegment of the nanotube. The device consists of a SWNT coated by a 20 nm-thick, 100 nm-wide metallic wire (Pd) (Fig. 1a). Ananometric sized gap is formed by means of controlled electromigration in the center of the wireresulting in two nanometer spaced electrodes connecting a small portion of SWNT (

In conclusion, we demonstrate first that excellent GMI response can be obtained from nanostructuredmultilayers deposited onto a flexible and transparent polymeric substrate. These magneticnanostructures can be useful for a number of applications as detection of magnetic micro and nanoparticles in microfluidic chambers that are fabricated using such materials [8]. On the other hand, wehave centered in studying the pressure response of the materials deposited. Good pressure sensitivitiesare obtained at zero magnetic field applied and at MI maximum sensibility magnetic field when thenanostructure element is deposited onto a polymeric substrates. Focusing on possible pressure sensorapplications, we have checked that our sensor impedance change due to pressure, is stable when smallmagnetic field variations are applied.References[1] R. S. Beach and A. E. Berkowitz, Appl. Phys. Lett. 64, 3652 (1994).[2] A. Antonov, S. Gadetsky, A. Granovsky, A. Diachkov, M. Sedova, N. Perov, T. Furmanova, and A.Lagarkov, Physica A, vol. 241, pp. 414 419, 1997.[3] M. A. Correa, F. Bohn, C. Chesman, R. B. da Silva, A. D. C. Viegas and R. L. Sommer , J. Phys. D:Appl. Phys., vol. 43, pp. 295004-7, 2010.[4] L. V. Panina and K. Mohri, Sens. Actuators, A 81, 71 (2000).[5] E. Fernndez, A. Garcia-Arribas, S. O. Volchkov, G. V. Kurlyandskaya, and J. M. Barandiaran, IEEE

Trans. Magn. 46, 658 (2010).[6] Svalov, A.V. Aseguinolaza, I.R. Garcia-Arribas, A. Orue, I. Barandiaran, J.M. Alonso, J. Fernandez-

Gubieda, M.L. Kurlyandskaya, G.V. Magnetics, IEEE Transactions on Magn., vol. 46. pp. 333 336,Feb. 2010.

[7] D. de Cos, A. Garca-Arribas and J. M. Barandiarn, Sens. Actuators A, vol. 115, pp. 368 375, 2004.[8] A. Garcia-Arribas, F. Martnez, E.Fernndez, I.Ozaeta, G.V.Kurlyandskaya, A.V. Svalov, J.Berganzo,

J.M. Barandiaran, -A, in print.

Figures:Figure 1 Figure 2

Figure 4 Figure 3

Flexible Transparent Electrodes using Carbon NanotubesNria Ferrer-Anglada1, Jordi Prez-Puigdemont1,2, M.Z. Iqbal1, S. Roth2,3

1Applied Physics Department, Universitat Politcnica de Catalunya, Campus Nort B4, J Girona 1-3,08034 Barcelona (Catalonia) Spain2Max Planck Institute for Solid State research, Heisenbergtrasse 1, 70569 Stuttgart, Germany3School of Electrical Engineering, WCU Flexible Nanosystems, Korea University, Seoul, Korea

[email protected]

Flexible conducting thin films are useful for applications in different kind of devices called assensors, transistors, or transparent electrodes that could be used in photovoltaic solar

cells.With this objective we prepared thin single walled carbon nanotubes (SWCNT) networks on atransparent and flexible substrate (PPC) with different SWCNT densities using a very simple spraymethod [1]. We measured the electric impedance at different frequencies Z(f) in the frequency rangefrom 40 Hz to 20 GHz using two different methods: two-probe method in the range up to 110MHz and a coaxial (Corvino) [2] method in the range from 10 MHz to 20 GHz, see figure 1.We measured the optical absorption and electrical conductivity in order to optimize the conditions forobtaining optimum performance, films with both high electrical conductivity and transparency, see figure2. We observe a square resistance from 8,5 to 2 kohm for samples showing 85% to 65% opticaltransmittance respectively.For some applications we need flexibility and not transparency: for this purpose we deposited athick film of single walled carbon nanotubes (SWCNT) on a flexible silicone substrate by spray, from anaqueous suspension of SWCNT in SDS, obtaining a flexible conducting electrode.The measured electrical resistance is as low as 200 ohm/square, the impedance is constant from DC upto high frequency. Stretching up to 10% and 20% the electrical resistance increases slightly with thestretching, recovering the initial value for small elongations. The stretching is reversible for elongationsup to 10%.We analyzed the stretched and non stretched samples by Raman spectroscopy, and could observe thatRaman spectra breathing mode are very sensitive to the stretching. The high energy Raman modes arenot changed, then we are not introducing defects when stretching.In both cases, using selected metallic carbon nanotubes could enhance electrical conductivity by afactor from 5 to 10 [4], increasing the film performance. Also previous carbon nanotubes purification willenhance the transparency. Recent results using graphene to obtain flexible transparent electrodes aremuch successful [5], their obtained samples show sheet resistances as low as125 to 25 ohm/square for97,4 to 90% transparency respectively. But in our case the films are obtained just using a very simplespray method, from an aqueous suspension of carbon nanotubes and can be deposited on any kind andshape of surface.

References[1] N. Ferrer-Anglada, J. Prez-Puigdemont, S. Roth, et al. Phys. Statuts Solidi B, 245 (2008) 2276.[2] H. Xu, G.Gruner, et al. Appl. Phys. Lett., 90 (2007) 183119(1-3)..[3] N. Ferrer-Anglada, M. Kaempgen, S. Roth, Phys. Status Solidi B, 243, 13, (2006) 3519.[4] A. A. Green, M.C. Hersam, Nanoletters, 8, 5 (2008) 1417.[5] S. Bae, H. Kim, Y. Lee, X. Xu, J-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H.R. Kim, Y.I. Song, Y-J.Kim, K.S. Kim, B. zyilmaz, J-H. Ahn, B.H. Hong, S. Iijima, Nature Nanotechnology 5 (2010) 574.Figures

Figure 1 shows the impedance dependence on frequency Z(f). We can define the cut off frequency fo, at which Zdecreases abruptly; we observe that fo increases when increasing the SWCNT density on the substrate.

Figure 2 shows the transparency (%Transmittance at 550nm) versus the sheet resistance, R

Figure 4 Raman spectroscopy on the unstretched and stretched samples show clear shift on the breathing mode

Nanoporous impedimetric fibre sensor for the detection of acute inflammation in woundsDagmar Gelinsky-Wersing

Institute for Materials Science and Max Bergmann Center, Technische Universitt Dresden,Budapester Str. 27, 01069 Dresden, Germany

[email protected] is common clinical practice to change wound dressings in a certain time interval of 24 to 48 hours tocontrol possible infections of the wound. This induces stress to the micro environment of the wound.Therefore, effort is made to monitor wound healing by non invasive sensor designs. A multi-parametricsensor integrated in the wound dressing was suggested, that detects an infection and, consequently,avoids stress factors given by frequent and unnecessary changes of bandages [1].Neutrophils are among the first immune cells to arrive at the site of inflammation and releasedneutrophil proteases are involved in bacterial killing, tissue degradation and regulation of theinflammatory response [2]. Changes in neutrophil proteases and especially neutrophil elastase activitycould be a potent signal for an ongoing wound inflammation in combination with parameters likechange of pH value [3], temperature [4] or concentration of reactive oxygen species [5]. The authorshave used AC impedance spectroscopy to detect protease activity based on thin film degradation ofmodified natural enzyme substrates deposited on the surface of interdigitated gold electrodes [6].These measurements have been used for a redesign to improve the sensor responsivity andselectivity for neutrophil elastase.A nanoporous fiber sensor was designed that would be integrable in wound dressings by automatedstitching or weaving processes (Figure 1). The sensor is build up by thin fibrous electrodes embeddedin a surrounding nanoporous membrane that will be constructed by a nanoparticle leaching process[7]. The detection principle is based on the change of ionic conductance through the nanopores afterbinding of neutrophil elastase to its immobilized inhibitor elafin by the mechanism of volumeexclusion [8]. In a wound with ongoing inflammation neutrophile granulocytes release high amounts ofneutrophil elastase. The present elastase binds to elafin immobilized in the nanopores of the sensorsurface thereby blocking the ionic flow of wound exudate to the electrode.As a proof of concept impedance measurements were performed with elafin immobilized in aluminumoxide nanomembranes. Gold was directly deposited on commercial anodized aluminum oxide (AAO)filter membranes and placed on a bare gold electrode to function as working electrode. Themembrane was placed into the spectrometer flow chamber (Inphaze Impedance Spectrometer,Australia) and the gold wire counter electrode of the flow cell was used for a two electrode system.The AAO membrane has two different pore diameters 20 nm diameter on the top side (1 mthickness) and 200 nm on the bottom side (60 m thickness) therefore the orientation of themembrane is of great relevance to the expected blocking of ionic flow to the electrode [9].Measurements were performed with the 20 nm side of the membrane in close contact to the workingelectrode to ensure that the exclusion of ions by elastase will be measured. Figure 2 shows the effectof all performed modification steps on the AAO membrane.

References[1] Schrter A, Fritzsche K, Wersing D, Walther A, Rsen-Wolff A, Gerlach G, 3. Dresdner

Medizintechnik-Symposium. In: Dresdner Beitrge zur Medizintechnik, Jg. 10 (2010) 59. ISBN:978-3-942710-02-2

[2] Heutinck KM, Nerge IJM, Hack CE, Hamann J, Rowshani AT, Molecular Immunology47(2010) 1943.

[3] Schneider L, Korber A, Grabbe S, Dissemond J, Arch Dermatol Res 298 (2007), 413.[4] van Pieterson L, Kok MAS de, Koninklijke Phillips electronics N.V. (Eindhoven, NL).

US 20090204100 A1 (2009).[5] Lambeth JD, Nature Reviews Immunology 4 (2004), 181.

[6] Application filled for a patent : Schrter A, Gelinsky-Wersing D, Rsen-Wolf A, Gerlach G,Wundsensor (2011).

[7] Kellenberger CR, Luechinger NA, Lamprou A, Rossier M, Grass RN, Stark WJ,Journal of Membran Science, (2011) in press.

[8] Wang X, Smirnov S, ACS Nano 3 (2009) 1004.[9] Vlassiouk I, Takmakov P, Smirnov S, Langmuire (2005) 4776.

Figure1. Schematic illustration of the fibrous inflammation sensor. (a) Fiber electrodes integrated in awound dressing. (b) Neutrophile elastase bound to the immobilized inhibitor elafin blocks the ionic flowof the wound exudate.

Figure 2. Cole-Cole (or Nyquist) plot of the capacitance persurface area of AAO membrane with Au film deposited on the 20nm side measured in PBS buffer at 5 mV. Median of threemeasurement circles. Black measuring points, bare membrane;green dots, carboxysilane modified membrane; blue dots,membrane with immobilized elafin; red dots, elastase treatedelafin-membrane.AcknowledgementsWe acknowledge the Bundesministerium fr Bildung und Forschung for funding the project ChiBS-Chip-basierte Biologie fr die Sensorik (project number 45952) within the framework of the WK-Potential programme.

et al.et al.

et al.

On the use of Artificial Neural Networks in Electrostatic Force MicroscopyE. Castellano-Hernndez, F. B. Rodrguez, E. Serrano, P. Varona and Gmez-Moivas Sacha

Grupo de Neurocomputacin Biolgica. Departamento de Ingeniera Informtica. EscuelaPolitcnica Superior. Universidad Autnoma de Madrid. Spain.

[email protected] present different applications of Artificial Neural Networks [1] in Electrostatic ForceMicroscopy [2] [3]. First, a detailed analysis of the electrostatic interaction between anElectrostatic Force Microscope tip and a thin film is presented. By using Artificial NeuralNetworks, an equivalent semiinfinite sample has been described as an excellent approximationto characterize the whole thin film sample. A useful analytical expression has been alsodeveloped. In the case of very small thin film thicknesses (around 1nm), the electric response ofthe material differs even for very high dielectric constants. This effect can be very important forthin materials where the finite size effect can be described by an ultrahigh thin film dielectricconstant.The second application we present is a technique to calculate electrostatic magnitudes such asforce and potential in Electrostatic Force Microscopy setups [4]. This technique combinesArtificial Neural Networks and the Generalized Image Charge Method [5] to overcome one ofthe main problems of traditional numerical simulations: the need of many parameters that aredifficult to estimate and depend on the geometry of the experimental setup. Using ArtificialNeural Networks, our technique is able to estimate the internal parameters of the algorithm andautomatically obtain the electric magnitudes with a very high accuracy. This technique has beenimplemented in the freely distributed software winGICM. [6] The automatic configuration of thesoftware by an Artificial Neural Network allows the users to handle it without being specificallytrained in the theoretical background underlying the algorithms.Finally, a technique that combines a theoretical description of the electrostatic interaction andArtificial Neural Networks (ANNs) is used to solve an inverse problem in Scanning ProbeMicroscopy setups. [7] Electrostatic interaction curves calculated by the Generalized ImageCharge Method (GICM) are used to train and validate the ANN in order to estimate unknownmagnitudes in highly undetermined setups. To illustrate this technique, we simultaneouslyestimate the tip-sample distance and the dielectric constant from a system composed of a tipscanning over a metallic nanowire. In a second example, we use this method to quantitativelyestimate the dielectric constant in an even more undetermined system where the tip shape(characterized by three free parameters) is not known. Finally, the proposed method is validatedwith experimental data.

References[1] Haykin S 1999 Neural Networks. Prentice Hall. New Jersey[2] J. Hu, X.-D. Xiao, and M. Salmeron. Appl. Phys. Lett 67, 476 (1995).[3] S. Guriyanova, D. S. Golovko and E. Bonaccurso. Measurement Science and Technology21, 025502 (2010).[4] G. M. Sacha, F. Rodrguez, E. Serrano and P. Varona. Journal of ElectromagneticWavesand Applitations 24, 1145 (2010).[5] G. M. Sacha, E. Sahagn and J. J. Senz. J. Appl. Phys. 101, 024310, (2007)[6] available at www.ii.uam.es/~sacha[7] G. M. Sacha, F. B. Rodrguez and P. Varona. Nanotechnology 20, 285704 (2009).

Figures

FIG. 1.Scheme of the method to obtain the effective dielectric constant of a thin film sample.The electrostatic force of a system composed by a thin film over a dielectric substrate(equipotential lines shown at the top) is used as the input of an Artificial Neural Network. Theoutput value is the effective dielectric constant of an equivalent s

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