growth of vertically aligned carbon nanotube

... National University of Singapore 23 Chapter Theoretical studies of carbon nanotubes Chapter Theoretical studies of carbon nanotubes Summary The theoretical studies of carbon nanotubes were divided ... properties of small radii nanotubes National University of Singapore 10 Chapter Literature Background 2.2 Potential applications of carbon nanotubes Fundamental properties of carbon nanotubes ... characterizations of carbon nanotubes……….….……….104 4.1 Synthesis and characterizations of carbon nanotubes…… ………………… ……105 National University of Singapore v TABLE OF CONTENTS 4.1.1 Decomposition of CH4...

Ngày tải lên: 12/09/2015, 09:28

... dependence of@ e structure of EELS on the diameter and the anisotropic features of CNTs Introduction - Morphological Features of CNTs Since the discovery of carbon nanotubes (CNTs) [I], most of the ... publication meets the requirements of ANSI/NISO 239.48-1992 (Permanence of Paper) Printed in The Netherlands V EDITORIAL Carbon nanotube (CNT) is the name of ultrathin carbon fibre with nanometersize ... monograph is entitled "The Science and Technology of Carbon Nanotubes" as the successive version of ref for the benefit of actual and potential researchers of these materials by collecting and arranging...

Ngày tải lên: 05/03/2014, 17:20

... high (b1100°C), a mixture of graphitic carbon and SiC nanowires was formed because of both the carbonization of the nanowires and the fast carbon deposition to form the carbon- like structure Conclusions ... formed by carbon atoms di€using into the Si NWs, CNTs could not be formed very well on the surface of nanowires because of both the volume change of the nanowires and breaking of the carbon network ... coated carbon grew to become large carbon sheets, as shown in the bottom image in Fig 4b Even the nanowires were completely carbonized and mixed into a lot of carbon sheets to form a mixture of Fig...

Ngày tải lên: 16/03/2014, 15:04

... Multi-step purification of carbon nanotubes Carbon 2002;40(1):81–5 Ikazaki F, Ohshima S, Uchida K, Kuriki Y, Hayakawa H, Yumura M, et al Chemical purification of carbon nanotubes by use of graphite-intercalation ... decomposition of hydrocarbons Carbon 2000;38(14):2041–5 Montoro LA, Rosolen JM A multi-step treatment to effective purification of single-walled carbon nanotubes Carbon 2006;44(15):3293–301 CARBON ( ... New method of purification of carbon nanotubes based on hydrogen treatment J Phys Chem B 2004;108(22):6935–7 [55] Tan SH, Goak JC, Hong SC, Lee N Purification of singlewalled carbon nanotubes using...

Ngày tải lên: 20/03/2014, 13:06

... number of experimental measurements of the Young’s modulus of nanotubes have been reported The first such study [71] correlated the amplitude of the thermal vibrations of the free ends of anchored nanotubes ... 10) nanotubes a pseudogap of the order of 0.1 eV is predicted to open up in the density of states due to the breaking of mirror symmetry in the rope [18] Mechanical Properties of Carbon Nanotubes ... Mechanical Properties of Carbon Nanotubes 297 Fig HREM images of bent nanotubes under mechanical duress (a) and (b) single kinks in the middle of SWNT with diameters of 0.8 and 1.2 nm, respectively...

Ngày tải lên: 24/03/2014, 05:20

... both ends of each CNT.18,25 A total of five individual nanotubes were studied for each growth condition (or dc bias voltage), and the nanotubes were randomly picked from three samples of MWCNT ... to evaluate the quality of the CNTs Yoshida et al.32 have shown that the FWHM intensity of the G-band reflects the degree of graphitization of carbon materials The effect of dc bias voltage on the ... the existence of multiple G peaks The quality of the fit in the low-energy and high-energy tails of the D- and G-bands, respectively, is good The assignment of the peak components of the D- and...

Ngày tải lên: 06/05/2014, 08:53

... Performance of Carbon Nanotube Field-Effect Transistors 9.5 Carbon Nanotube Transistor Operation in Terms of a Schottky Barrier Model 9.6 The Role of Nanotube ... density of states of the nanosystem Derivation of this density of states in the presence of external perturbations is a difficult task We present some examples of the modification of the nanotube ... concepts to the studies of the unique physical and mechanical properties of carbon nanotubes Some of the chapters in these books deal with what might be unique about carbon nanotubes and where one...

Ngày tải lên: 04/06/2014, 14:50

... energy of singlewalled carbon nanotubes Appl Phys Lett 1999, 16:2307-2309 Peigney A, Laurent C, Flahaut E, Bacsa RR, Rousset A: Specific surface area of carbon nanotubes and bundles of carbon nanotubes ... applications of single walled carbon nanotubes Curr Med Chem 2010, 17:10-24 Ito Y, Venkatesan N, Hirako N, Sugioka N, Takada K: Effect of fiber length of carbon nanotubes on the absorption of erythropoietin ... separation of carbon nanotubes Nat Mater 2003, 2:338-342 Kim O-K, Je J, Baldwin JW, Kooi S, Pehrsson PE: Solubilization of single-wall carbon nanotubes by supramolecular encapsulation of helical...

Ngày tải lên: 20/06/2014, 22:20

... wall carbon nanotubes Carbon 2002, 40:2043-2061 24 Deng F, Zheng QS, Wang LF: Effects of anisotropy, aspect ratio, and nonstraightness of carbon nanotubes on thermal conductivity of carbon nanotube ... properties of the system Thus, we aimed at studying the effect of two types of carbon- based nanofillers, in particular, nanotubes and graphene sheets, on the thermal conductivity of an uncured ... indicate that MWNTs are the most effective carbon nanofillers to improve the K of liquid resins Indeed, the K of the nanofluids gradually increased as a function of MWNT content, reaching a 70% improvement...

Ngày tải lên: 20/06/2014, 23:20

... Catalyzing Growth of Single-Walled Carbon Nanotubes on Substrates Nano Lett 2006, 6:2987 17 Lu C, Liu J: Controlling the Diameter of Carbon Nanotubes in Chemical Vapor Deposition Method by Carbon ... Single-shell carbon nanotubes of 1-nm diameter Nature 1993, 363:603 Bethune DS, Kaing CH, de Vries MS, Gorman G, Savoy R, Vazquez J, Beyers R: Cobalt-catalysed growth of carbon nanotubes with ... and wellaligned carbon nanotube films on SiC J Phys D 40:6278 20 Kusunoki M, Suzuki T, Kaneko K, Ito M: Formation of self -aligned carbon nanotube films by surface decomposition of silicon carbide...

Ngày tải lên: 21/06/2014, 04:20

... resistibility of the carbon nanotubes towards ion-etching effects In the tip -growth mechanism, the catalyst was at the tip of the vertically growing SWNT, offered protection to walls of the nanotube ... high energy of *100 eV and caused C–C bond breakage The presence of plasma radicals such as NHx and H further chemically etched the surface of the carbon nanotubes The growth mechanism of SWNT in ... plasmaassisted growth of SWNTs Table summarized the synthesis of carbon nanotubes/ nanofibres at low temperatures (B500°C) reported in literature However, Teo et al [20] revisited the results of low temperature...

Ngày tải lên: 21/06/2014, 07:20

... the interactions of two types of SWNT (1) iron-rich (nonpurified) SWCNT (26% of iron) and (2) iron-stripped (purified) SWNT (0.23 wt% of iron) with RAW264.7 macrophages Each type of SWNT was able ... activation of macrophages The unusual feature of the response is a very early switch from the acute phase of the response to fibrogenic events resulting in significant pulmonary deposition of collagen ... eosin staining of mouse lung tissue (a, e) Fluronic F-68-treated group acts as the solvent control (b, f) Early response (3 days) of the mouse lung tissue to a single dose of 0.5 mg of SWNT (c,...

Ngày tải lên: 22/06/2014, 01:20

... of monogalactosylated serine and arabinosylated hydroxyproline Dispersion of SWNTs in YK20 solutions About mg of HiPCO carbon nanotubes (carbon nanotechnology Inc.) were added to a solution of ... non-complexed insoluble nanotubes The microfuge tube at the far left shows SWNTs solubilized in a mg/mL solution of YK20 while the microfuge tube to the right shows the 10-fold dilution of the SWNT-YK20 ... spectrum of SWNT-YK20 complexes multiplied by a factor of 2.25 Thus, the binding of SWNTs imposes some other conformations of YK20, and the polyproline II content in the secondary structure of the...

Ngày tải lên: 22/06/2014, 22:20

... the yield of carbon with the growth temperature has been plotted and shown in Fig It could be seen that the carbon yield increased with increasing growth temperature and a maximum of around 146% ... Fig Dependence of carbon yield on the reaction temperature be through the precipitation of carbon in the form of MWNTs from the molten catalytic particles The melting temperatures of the alloy-C ... types of carbon nanostructures have been obtained from CVD of methane at different growth temperatures (850–950°C), using Zr based alloy hydride catalyst Alloy-filled MWNTs were obtained at a growth...

Ngày tải lên: 22/06/2014, 22:20

... dependence of@ e structure of EELS on the diameter and the anisotropic features of CNTs Introduction - Morphological Features of CNTs Since the discovery of carbon nanotubes (CNTs) [I], most of the ... publication meets the requirements of ANSI/NISO 239.48-1992 (Permanence of Paper) Printed in The Netherlands V EDITORIAL Carbon nanotube (CNT) is the name of ultrathin carbon fibre with nanometersize ... monograph is entitled "The Science and Technology of Carbon Nanotubes" as the successive version of ref for the benefit of actual and potential researchers of these materials by collecting and arranging...

Ngày tải lên: 27/06/2014, 17:20

... dependence of@ e structure of EELS on the diameter and the anisotropic features of CNTs Introduction - Morphological Features of CNTs Since the discovery of carbon nanotubes (CNTs) [I], most of the ... publication meets the requirements of ANSI/NISO 239.48-1992 (Permanence of Paper) Printed in The Netherlands V EDITORIAL Carbon nanotube (CNT) is the name of ultrathin carbon fibre with nanometersize ... monograph is entitled "The Science and Technology of Carbon Nanotubes" as the successive version of ref for the benefit of actual and potential researchers of these materials by collecting and arranging...

Ngày tải lên: 27/06/2014, 18:20

... Chemistry of Carbon Nanotubes of translocation, a prerequisite for nanoscale separation devices 5.3 Encapsulation of Liquids A particular area of interest is the use of carbon tubes in nanofluidics ... internal cavities of tubes.411 Comparison of the catalytic activities of immobilized enzyme with those of the free species in the hydrolysis of penicillin showed that a significant amount of the inserted ... applications of CNT filled with a molten metal was the preparation of miniaturized thermometers The group of Bando described how the height of a column of liquid gallium inside nanotubes varies...

Ngày tải lên: 06/08/2014, 13:22

Ngày tải lên: 14/11/2014, 12:32

... properties and behaviour of CNTs are reported 1.1 Properties and applications of carbon nanotubes 1.1.1 Geometric properties of carbon nanotubes Multi-walled carbon nanotube (MWCNT) was first ... properties of carbon nanotubes 1.1.2 Mechanical properties of CNT and its characterization 1.1.3 Applications of CNT 12 1.2 Computational models to study mechanics of carbon nanotubes ... 2001, Li et al 2007) Copper Pitch carbon fiber PAN carbon fiber Source: http://www.nanocyl.com/CNT-Expertise-Centre /Carbon- Nanotubes 1.1.3 Applications of CNT Carbon nanotubes have high breaking strength,...

Ngày tải lên: 09/09/2015, 11:19

... 1.3 Dispersion of carbon nanotubes 1.4 Applications of carbon nanotubes 10 1.5 Structure and morphology of graphene 12 1.6 Properties of graphene 14 ... classified into single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs) and multi-walled carbon nanotubes (MWCNT) according to the number of graphene sheet layers (a) ... functionalization treatment of CNTs Figure 1.6 Schematic presentation of a functionalization process of oxidized CNTs [25] 1.4 Applications of carbon nanotubes CNTs have a lot of attractive applications...

Ngày tải lên: 10/09/2015, 08:35