nano carbon tube
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a. Kim cng; b.Than ch;c) Lonsdaleite; d)f) cu trc
Fullerene (C60, C540, C70);g) V nh hnh v h) ng than nano
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nTechniques have been developed to produce nanotubes in sizeablequantities, including arc discharge, laser ablation, high pressurecarbon monoxide (HiPCO), and chemical vapor deposition (CVD).
http://en.wikipedia.org/wiki/Electric_archttp://en.wikipedia.org/wiki/Laser_ablationhttp://en.wikipedia.org/w/index.php?title=HiPCO&action=edithttp://en.wikipedia.org/wiki/Chemical_vapor_depositionhttp://en.wikipedia.org/wiki/Chemical_vapor_depositionhttp://en.wikipedia.org/w/index.php?title=HiPCO&action=edithttp://en.wikipedia.org/wiki/Laser_ablationhttp://en.wikipedia.org/wiki/Electric_arc -
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n = m
=30
m =0
= 0
Metaln-m = 3k (k integer)
Carbon Nanotubes
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Ty thuc vo gc chiral m cc dng khc nhau ca
CNTs c xc nh: Nu = 0o (n = 0 hoc m = 0), ng zig - zag, Nu = 30o (n = m), ng armchair, Nu = 0o 30o (n m), ng chiral.
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KIM LOI
BN DN
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ng sut
Young(GPa)
cng(Gpa)
Ty trong(g/cm3)
MWNT 1.200 ~ 150 2,6
SWNT 1.000 75 1,3
dn nhit ca ng nano a vch khong t 1.800n 6.000 W/m.K, vhn 3.000 W/m.K i vi ng nanon vch. Cn bn nhit ca cc ng than nano ln ti2.800oC chn khng v khong 750oC trong khng kh.
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CNTs have High Electrical Conductivity
CNTs have Very High Tensile Strength
CNTs are Highly Flexible- can be bent considerablywithout damage
CNTs are Very Elastic ~18% elongation to failure
CNTs have High Thermal Conductivity
CNTs have a Low Thermal Expansion Coefficient
CNTs are Good Electron Field Emitters
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Thermal Conductivityof CNTsField Emissionof CNTsConductive Plasticswith CNTsEnergy Storageusing CNTs
Conductive Adhesives and Connectorswith CNTsMolecular Electronicsbased on CNTsThermal Materialswith CNTsStructural Compositeswith CNTs
Fibers and Fabricswith CNTsCatalyst Supportsusing CNTsBiomedical Applicationsof CNTsAir and Water Filtrationusing CNTs
Ceramic Applicationswith CNTsOther A lications 29/5/2009 10
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Vt liu composite
Ch cn thm 1% ng than nano th cng n hica CNT/polystyrene tng 25% so vi polystyrenethng thng. Cn ng nano n vch khi phn tn tttrong mng composite PVA (polyvinyl acetate) c phPVP (polyvinyl pyrrolidone) v SDS se gip tng cngsc cng c hc v ng sut n hi. Cn trong siPAN/SWNT, vi 10% SWNTs setng 100% ng sut n
hi nhit phng.
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In particular, the recent integration of carbon nanotubes intobiological systems has suggested their potential employment in thedelivery of therapeutic molecules, such as drugs, antigens and genes.
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Tng tc -xc tc mnh
Fe
CxHyCxHy
CxHy CxHy
Tng tc -xc tc yu
Fe
CxHyCxHy
CxHy CxHy
CxHy
C ch mc t di ln(Base-growth) C ch mc t trnxung(Tip-growth)
C CH MC NG THAN NANO
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PHNG PHP CH TO NG THAN NANO
- Phng in h quang
Phng php h quang setng hp ra mt hn hp gm ngthan nano, cc lp graphite, ccfullerene, bi than v mt s cc
ht xc tc kim loi ti in ccthan ch.
Do ty l tp cht kh ln nnphng php ny i hi qu trnh
lm sch ng than nano phc tpv mt nhiu thi gian.