theoretical studies of carbon nanotubes

... 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 ... of Singapore 24 Chapter Theoretical studies of carbon nanotubes 3.1 First-principles study of ultra-small 4Å single-walled carbon nanotubes Introduction The classifications of single-walled carbon ... 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...

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 ... 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 ... all of the authors should like to offer the readers the newest developments of the science and technological aspects of CNTs vi It is our biggest sorrow that in the course of preparation of this...

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

... Young’s modulus of carbon nanotubes The amplitude of those oscillations was defined by means of careful TEM observations of a number of nanotubes The authors obtained an average value of 1.8 TPa for ... 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 ... indicative of the exceptional axial stiffness of these materials More recently studies Mechanical Properties of Carbon Nanotubes 293 Fig Top panel: bright field TEM images of free-standing multi-wall carbon...

Ngày tải lên: 24/03/2014, 05:20

... spectra of CNTs grown under negative and zero dc bias voltage represent sp3 rich phases of CNTs and suggest the existence of amorphous carbon or defects on the walls of CNTs.31 The absence of a ... intensity of the G-band reflects the degree of graphitization of carbon materials The effect of dc bias voltage on the IG/ID ratio and the FWHM are presented in Figure The line shapes of the G- ... 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...

Ngày tải lên: 06/05/2014, 08:53

... production 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 ... single-walled variant of carbon nanotubes Since then, we have observed the progress of science and technology as it relates to carbon nanotubes changing from the discovery of various methods to ... desirable nanotubes, and unique and novel measurement tools to characterize the chiralities of nanotubes Other chapters deal with the measurement of the electronic properties of carbon nanotubes...

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

... single 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 ... 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 Feeding ... role of free radical condensates in the production of carbon nanotubes during the hydrocarbon CVD process Carbon 2006, 44:1653 55 Rümmeli MH, Bachmatiuk A, Scott A, Börrnert F, Warner JH, Hoffman ... Rümmeli MH: Tuning carbon nanotubes through poor metal addition to iron catalysts in CVD Fuller Nanotubes Carbon Nanostruct 2010, 18:703 13 Baker T: Formation of filamentous carbon Chem Ind (London)...

Ngày tải lên: 21/06/2014, 04:20

... (L-bands) Our Raman studies indicate the presence of L-bands and confirmed the existence of linear carbon within the SWNT samples Theoretical studies of carbon plasma [68] predicted that using low temperature ... 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 ... image of linear carbon chains encapsulated within SWNTs Encapsulated linear carbon chains within carbon nanotubes has a unique characteristic Raman signal located *1,850 cm-1 (L-bands) Our Raman studies...

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

... 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 ... TEM images of Zr-based AB2 alloy filled MWNTs grown at a temperature of 850°C, (c) HRTEM image of Ni-filled MWNT grown at 875°C, (d) TEM image of MWNTs grown at 900°C optical mode E2g of two-dimensional ... production of hydrogen [23] Carbon nanofibers possessing a platelet structure were obtained by Wang et al., by decomposition of methane over Ni–Cu–MgO catalyst [24] Since the morphology of deposited carbon...

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 ... 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 ... all of the authors should like to offer the readers the newest developments of the science and technological aspects of CNTs vi It is our biggest sorrow that in the course of preparation of this...

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 ... 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 ... all of the authors should like to offer the readers the newest developments of the science and technological aspects of CNTs vi It is our biggest sorrow that in the course of preparation of this...

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 ... by TEM One of the most exotic 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...

Ngày tải lên: 06/08/2014, 13:22

Ngày tải lên: 14/11/2014, 12:32

... 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 ... mechanical 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 ... 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