CARBON NANOTUBES

Trường Đại học Bách Khoa thành phố Hồ Chí Minh. Môn học: Hóa Nano. Đề tài: Carbon Nanotubes. Giáo viên hướng dẫn: Cô Nguyễn Ngọc Hạnh. Tổng quan về Carbon Nanotubes, các phương pháp chế tạo ống nano cacbon, ứng dụng của carbon nanotube

nanotubes doped with 2–10% of nitrogen become metallic (Charlier, 2002; Czerw et al., 2001). Interestingly, nitrogen-doped carbon nanotubes constitute a good metal-free catalyst system for oxygen reduction reactions in alkaline media (Gong et al., 2009). In acidic media, these n[r]

graphene(From R. Smalley´s web image gallery) - Single-wall nanotubes (SWNTs)- Multi-wall nanotubes (MWNTs)Carbon Nanotubes~ 1-2 nmFew microns TEM images of various MWNTs ~ 2 - 50 nm Properties of CNT•Electrical : –High electric conductivity (higher than copper)–Easy proc[r]

gogical abilities. All of them have made major research contributions to thefield of carbon nanotube science.The book is organized as follows: Chap. 1 is a general introduction tothe structure of nanotubes, referring to other forms of carbon; synthesis tech-niques and discussion[r]

Carbon là một nguyên tố phổ biến trong lớp vỏ trái đất. Trong tự nhiên, carbon tồn tại chủ yếu dưới ba dạng thù hình là: dạng vô định hình, dạng tinh thể graphite và dạng tinh thể kim cương. Năm 1985, người ta phát hiện ra còn có một dạng nữa của carbon và đặt tên là fullerene. Ở dạng này, các nguyê[r]

Keywords:Conducting polymerSquare wave voltammetryOligonucleotidesElectrochemical biosensorLabel-free detectionMicroRNAabstractIn this paper, a label-free and reagentless microRNA sensor based on an interpenetrated network ofcarbon nanotubes and electroactive polymer is described. The nanostr[r]

 In nanotechnology,carbon nanobuds form amaterial (discovered and synthesized in 2006)which combines two previously discoveredallotropes of carbon: carbon nanotubes andspheroidal fullerences (or, in short, fullerenes) fullerenes are covalently bonded to the outersidewal[r]

for CNTs with a greater aspect ratio [24]. In this study, both CNTs exhibit a similar aspect ratio, so this issue does not seem to affect the K of the nanofluid. Another factor that determines the K of CNTs is the presence of structural defects. Che et al. [25] revealed that the K of CNTs decreased[r]

66 (2000) 59–62.[10] T.K.H. Starke, G.S.V. Coles, High sensitivity ozone sensors for environmentalmonitoring produced using laser ablated nanocrystalline metal oxides, IEEESens. J. 2 (1) (2002) 14–19.[11] S. Picozzi, S. Santucci, L. Lozzi, C. Cantalini, C. Baratto, G. Sberveglieri, I. Armen-tano, J.[r]

In the confocal Raman spectra, as already mentioned,very weak and broad or no RBM at all could beobserved. This might indicate that, on using the 2.33 eVexcitation line, we are slightly off-resonance with theoptical transitions of these carbon nanostructures.The different RBMs observed in the[r]

these nanotubes show amazing mechanical and electronicproperties, but also possess well-defined hollow interiorsand biocompatibility with living systems. As a result, CNTsare considered to be excellent candidates for many potentialapplications, including but not limited to: catalyst and cata-l[r]

a very early stage of thick- ening by pyrolytic carbon deposition is depicted in Figs. 6a-c; these samples were: (a) as-grown and (b), (c) heat treated at 2500°C. The pyrolytic coatings shown are characteristic features of PCNTs produced by the present method. The deposition of extra car- bon[r]

Taylor and Francis; 2006.11. Barick AK, Tripathy DK: Effect of nanofiber on material properties ofvapor-grown carbon nanofiber reinforced thermoplastic polyurethane(TPU/CNF) nanocomposites prepared by melt compounding. ComposPart A 2010, 41:1471.12. Salvatierra RV, Oliveira MM, Zarbin AJG: On[r]

649. 39. Bai, H.P.; Lu, X.X.; Yang, G.M.; Yang, Y.H. Hydrogen peroxide biosensor based on electrodeposition of zinc oxide nanoflowers onto carbon nanotubes film electrode. Chin. Chem. Lett. 2008, 19, 314-318. 40. Zhao, Y.; Liu, H.; Kou, Y.; Li, M.; Zhu, Z.; Zhuang, Q. Structural and ch[r]

IntroductionNanotips made of carbon can have many differentapplications such as scanning microscope probes [1] andfield emission (FE) sources [2]. For instance, recentlycarbon nanofibers were used as the electron source inorder to test and build an FE display device prototypewhere a new nanocry[r]

NANO EXPRESSHall Measurements on Carbon Nanotube Paper ModifiedWith Electroless Deposited PlatinumLeslie Petrik Æ Patrick Ndungu Æ Emmanuel IwuohaReceived: 15 June 2009 / Accepted: 9 September 2009 /Published online: 18 September 2009Ó to the authors 2009Abstract Carbon nanotube paper,[r]

0957-4484/07/385303+04$30.00 1 © 2007 IOP Publishing Ltd Printed in the UKNanotechnology 18 (2007) 385303 PBAmamaet alensuring high reproducibility of CNT growth. Fe2O3nanoparticles were prepared via an interdendritic templatingmechanism involving Fe3+ions and an amine-terminatedfourth-generation po[r]

NANO EXPRESS Open AccessEnhancing surface heat transfer by carbonnanofins: towards an alternative to nanofluids?Eliodoro Chiavazzo and Pietro Asinari*AbstractBackground: Nanofluids are suspensions of nanoparticles and fibers which have recently attracted much attentionbecause of their superior therm[r]

tungsten oxides and get thinner and thinner over a longduration through the sublimation of the oxides. In addition,hot cathodes require a power supply for heating, thus mak-ing it difficult to construct a compact electron-beam tool.In the mid 1950s, these disadvantage of hot cathodes werebe overcome[r]

-saturated 1 M KOH solution on high pressure annealed pyrolytic graphite:  edge plane, basal plane [22]. (Reprinted from Electrochimica Acta, 15(6), Morcos I. and Yeager E., Kinetic studies of the oxygen—peroxide couple on pyrolytic graphite, 953–75, ©1970, with permission from Elsevier.) 2.2.1.2.[r]