researching thin films
DESCRIPTION
Researching thin films. By Stephen Hudson, M.Ed The Design and Technology Academy @ Roosevelt High School North East ISD, San Antonio With Faculty Mentor Haiyan Wang, PhD Department of Electrical and Computer Engineering. - PowerPoint PPT PresentationTRANSCRIPT
RESEARCHING THIN FILMSBy Stephen Hudson, M.Ed
The Design and Technology Academy @ Roosevelt High School
North East ISD, San Antonio
With Faculty Mentor Haiyan Wang, PhDDepartment of Electrical and Computer
EngineeringDr. Haiyan Wang – Functional Thin Film Processing and
Characterization Group
IMAGINE…A PC as thin as a piece of paper
with more computing power than today’s devices…
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
IMAGINE…A home where the roof tiles no
longer need replacing AND which generate enough electricity for 100% of the family’s needs…
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
IMAGINE…Nuclear Energy Plants with fewer
maintenance issues on critical parts…
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
These are just a few of the upcoming applications based on the research being done in Dr. Wang’s labs at
Texas A&M
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
WHAT IS THIN FILM?
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
•SYNTHESIS
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
•CHARACTERIZATION•STRUCTURE – PROPERTY CORRELATION
SYNTHESIS
Pulsed Laser Deposition
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
FORMS OF SYNTHESISPVD (Physical Vapor Deposition)• Thermal Evaporation• Electro-deposition• Magnetron sputtering (DC, RF) • Pulsed Laser Deposition• MBE (molecular beam epitaxy)CVD (Chemical Vapor Deposition)• APCVD (atmospheric CVD)• LPCVD (low-pressure CVD)• PECVD (Plasma-enhanced CVD)• LECVD (Laser-enhanced CVD)• MOCVD (Metal-organic CVD)Solution based deposition techniques• Sol-gel• PAD (Polymer assisted deposition)
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
CHARACTERIZATIONCharacterization, when used in
materials science, refers to the use of external techniques to probe into the internal structure and properties of a
material. Characterization can take the form of actual materials testing, or
analysis, using, in our case, a Scanning Electron Microscope (non-destructive) or a Transmission Electron Microscope
(destructive).
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
ScanningElectron
Microscope
(Non-destructive
)
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
In-situ Transmission Electron Microscope
STRUCTURE – PROPERTY CORRELATION
Once the synthesis and analyses are complete, Dr. Wang’s team looks for desirable properties
for applications such as:
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
•High temperature tolerance•Radiation tolerance•High temperature super- conductivity•Ferroelectric materials
•Thin Film Solid Oxide Fuel Cells•Metallic Thin Films •Bio-compatible films•Soft Films
RESEARCH ACTIVITIES•Participate in all aspects of the research objective:
•Synthesis, •Characterization, •Property Correlation
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
RESEARCH ACTIVITIES•Familiarization with the tools used in this research:•Synthesis: Pulsed Laser, Sputter Magnetron•Characterization: Transmission Electron Microscope, In-situ TEM, Scanning Electron Microscope, X-Ray Diffraction, •Structure-Property Correlation: Vibrating Sample Magnetometer, Physical Property Measurement System, Deposition for High Temp Superconductor
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
RESEARCH ACTIVITIES•Data Generation• and interpretation
•2 Weeks with Dr. Zhang, using the same plan, primarily focusing on Mechanical properties.
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
Synthesis
Character-
ization
Structure –
Property
Corr.
LESSON PLAN
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
Simple Cubic Face Center Cubic(FCC)
Body Center Cubic(BCC)
Hexagonal Close Packed(HCP)
Diamond(Cubic)
Perovskite(cubic)
Simple Cubic Face Center Cubic(FCC)
Body Center Cubic(BCC)
Hexagonal Close Packed(HCP)
Diamond(Cubic)
Perovskite(cubic)
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
LESSON PLAN IDEAS•First week: What I did with Math this Summer PPT
•I will do one, too, to introduce the idea of Thin Films•Special Right Triangles Unit: use the Simple Cube structure of the lattice to ‘measure’ the distance between atoms. Given a specific desirable property related to density, which lattice would you pick? Why?•Circle Unit: Planar Density. Deciding Fracture points.•Volume Unit: Build models of the three basic Cube structures. Decide which model is densest and provide accurate calculations. When is porosity desirable?
I WISH TO THANK:Dr. Haiyan Wang and Dr. Xinghang Zhang
Joon Hyan Lee, PhD CandidateZhenxing Bi, PhD Candidate
Logan Lu, PhD CandidateChenfong Tsai, PhD Candidate
Dr. Haiyan Wang – Functional Thin Film Processing and Characterization Group
Nuclear Power
Institute
