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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.