synthesis and characterizations of carbon nanotub

... Chapter Synthesis and characterizations of carbon nanotubes……….….……….104 4.1 Synthesis and characterizations of carbon nanotubes…… ………………… ……105 National University of Singapore v TABLE OF CONTENTS ... ……………………….148 6.1 Synthesis and characterizations of nitrogen-doped carbon nanotubes……………….149 6.1.1 Synthesis of CNx nanotube…………………………………………………… 150 6.1.2 Characterizations of CNx nanotubes……………………………………….…….151 ... Appendix A7.2 .Synthesis and characterizations of boron nitride nanotubes…………….205 Appendix A7.3 Synthesis and characterizations of TiO2-derived nanotubes ………….212 National University of Singapore...

Ngày tải lên: 12/09/2015, 09:28

... Chapter Synthesis and Purification of MultiWalled and Single-Walled Carbon Nanotubes M.Yumura Chapter Electron Diffraction and Microscopy of Carbon Nanotubes S Amelinckx, A Lucas and P ... Structure and Raman Effect of Single-Walled Carbon Nanotubes R Saito, G Dresselhaus and M S Dresselhaus 51 Chapter Behaviour of Single-Walled Carbon Nanotubes in Magnetic Fields H Ajiki and T Ando ... D.M.,King, B E and Wineland, D J., Science, 1996, 272, 1131 2 CHAPTER Synthesis and Purification of Multi-Walled and Single-Walled Carbon Nanotubes MOT00 YUMURA National Institute of Materials and Chemical...

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 ... 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 ... crystalline Si core and a sheath of multi-walled CNTs; (b) a nanowire with a part of the core transformed into b-SiC and coated with a sheath of CNTs b-SiC nanowires and graphitic carbon, as shown...

Ngày tải lên: 16/03/2014, 15:04

... strategy for cutting and purification of single-walled carbon nanotubes Carbon 2007;45(10):1972–8 [134] Bandow S, Asaka S, Zhao X, Ando Y Purification and magnetic properties of carbon nanotubes Appl ... weight of the original carbon sample Furthermore, they found that the yield depended crucially on the flow rate of oxidant, the amount of initial sample, the manner of packing of the carbon, and ... reactions of Fe and Ni impurities can be considered as an indication of the extent of removal of the amorphous carbon, and the optimum electrochemical oxidation time for the purification of the as-grown...

Ngày tải lên: 20/03/2014, 13:06

... 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 (c) and (d) ... observed and is responsible for the apparent softening of MWNT of larger diameters A variety of largely and reversibly distorted (estimated up to 15% of local strain) configurations of the 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

... 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 G-bands ... 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 IG/ID ratio and ... FESEM images of CNTs grown under (e) +100 V and (f) + 200 V of Rao et al.28 and Sun et al.29 The Raman spectra are generally distinguished by two peaks around 1318 and 1595 cm-1 and a shoulder...

Ngày tải lên: 06/05/2014, 08:53

... 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 and ... Dispersion and Separation of Carbon Nanotubes 10.3 Separation of Carbon Nanotubes Dispersed by Non-ionic Surfactant 10.4 Structure and Electrostatics of the ... and the critical effects of the environment on the performance of SWNT-FETs are stressed Then the nature of the excited states of nanotubes and their optoelectronic properties are discussed, and...

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 ... visualization of DNA and proteins on carbon nanotubes Adv Mater 1998, 10:701-703 Vigolo B, Pénicaud A, Coulon C, Sauder C, Pailler R: Macroscopic fibers and ribbons of oriented carbon nanotubes Science ... dispersion and 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...

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 ... cross-link density and hence, on the final properties of the system Thus, we aimed at studying the effect of two types of carbon- based nanofillers, in particular, nanotubes and graphene sheets, ... Young's modulus of TPa and ultimate strength of 130 GPa [11] In addition to these outstanding properties, the recent developments on graphene synthesis routes and on -2- the understanding of their unique...

Ngày tải lên: 20/06/2014, 23:20

... constructing a carbon nanotube and bSiC on the surface of (111) b-SiC Lower panel: Schematic of the orientation relationship between one [111] SiC plane, on which carbon nanotubes are standing perpendicularly, ... Shaw EJ, Schlogl R, Hart AJ, Hofmann S, Wardle BL: Nanoscale Zirconia as a Nonmetallic Catalyst for Graphitization of Carbon and Growth of Single- and Multiwall Carbon Nanotubes J Am Chem Soc 2009, ... decompose the hydrocarbon Reilly and Whitten proposed a free radical condensate (FRC) forms which provides carbon species through a leaving group The breaking of carbon- hydrogen or carbon- carbon bonds...

Ngày tải lên: 21/06/2014, 04:20

... during the synthesis of CNFs but there is still a lack of information on the actual surface reaction of the catalysts The synthesis of carbon nanotubes or nanofibres requires temperature of 700–1,000°C ... 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 ... 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 and power density...

Ngày tải lên: 21/06/2014, 07:20

... release of proinflammatory cytokines, the recruitment of leukocytes, the induction of protective and antiapoptotic gene expression, and the activation of T cells The resulting innate and adaptive ... was detected with SWNTs and MWNTs [16–19, 42] High concentration of pristine and oxidized MWNTs have been shown to generate loss of viability of the human Jurkat T cells and human peripheral blood ... stimulates a proinflammatory response and recruitment of inflammatory cells Interactions include oxidative burst due to activation of NADPH oxidase and possible interactions of nanoparticles with microbial...

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 ... opened up and displayed the random networks of linear fibrils Since the polyproline-II helix is a left-handed helix with about residues per turn and a pitch of 9.4 angstrom, the length of YK20 is ... 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

... carbon Results obtained on the generation of carbon monoxide-free hydrogen during the CVD growth process will also be discussed In the present work, we discuss the synthesis of SWNTs, MWNTs and ... preparation of hydride catalysts Figure 2b shows the EDX spectra of Nifilled MWNT TEM and HRTEM images of SWNTs obtained at a growth temperature of 950°C are respectively shown in Fig 3a and b It ... 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%...

Ngày tải lên: 22/06/2014, 22:20

... Chapter Synthesis and Purification of MultiWalled and Single-Walled Carbon Nanotubes M.Yumura Chapter Electron Diffraction and Microscopy of Carbon Nanotubes S Amelinckx, A Lucas and P ... Structure and Raman Effect of Single-Walled Carbon Nanotubes R Saito, G Dresselhaus and M S Dresselhaus 51 Chapter Behaviour of Single-Walled Carbon Nanotubes in Magnetic Fields H Ajiki and T Ando ... D.M.,King, B E and Wineland, D J., Science, 1996, 272, 1131 2 CHAPTER Synthesis and Purification of Multi-Walled and Single-Walled Carbon Nanotubes MOT00 YUMURA National Institute of Materials and Chemical...

Ngày tải lên: 27/06/2014, 17:20

... Chapter Synthesis and Purification of MultiWalled and Single-Walled Carbon Nanotubes M.Yumura Chapter Electron Diffraction and Microscopy of Carbon Nanotubes S Amelinckx, A Lucas and P ... Structure and Raman Effect of Single-Walled Carbon Nanotubes R Saito, G Dresselhaus and M S Dresselhaus 51 Chapter Behaviour of Single-Walled Carbon Nanotubes in Magnetic Fields H Ajiki and T Ando ... D.M.,King, B E and Wineland, D J., Science, 1996, 272, 1131 2 CHAPTER Synthesis and Purification of Multi-Walled and Single-Walled Carbon Nanotubes MOT00 YUMURA National Institute of Materials and Chemical...

Ngày tải lên: 27/06/2014, 18:20

... molten iodine and observed the peapod structures 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 ... 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 ... flexibility and hydrophobicity result in sequence-dependent rates Chemistry of Carbon Nanotubes of translocation, a prerequisite for nanoscale separation devices 5.3 Encapsulation of Liquids A...

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 ... modelling and computational approaches for studying the mechanical properties and behaviour of CNTs are reported 1.1 Properties and applications of carbon nanotubes 1.1.1 Geometric properties of carbon ... List of tables xvii List of figures xix List of symbols and acronyms .xxvii Chapter Introduction 1.1 Properties and applications of carbon nanotubes...

Ngày tải lên: 09/09/2015, 11:19

... 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 1.6.1 Electronic and ... Figure 6.2 SEM images of (a) GO and (b) Zn-rGO, AFM images of (c) GO and (d) Zn-rGO, (e) TEM image of a free standing Zn-rGO sheet suspended on a lacey carbon TEM grid and (f) selected area electron ... 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)...

Ngày tải lên: 10/09/2015, 08:35