... physical propertiesof the nanotubes The symmetry groups for carbonnanotubes can be either symmorphic [such as armchair (n,n )and zigzag Physics ofcarbonnanotubes 29 Table Parameters ofcarbonnanotubes ... modes ofcarbon nanotubes: Spectroscopy and theory 129 R S RUOFF and D C KORENTS: Mechanicalandthermalpropertiesofcarbonnanotubes ... on carbonnanotubes We hope this book will contribute to the dissemination of present understanding of the subject and to future developments in the science and technology ofcarbonnanotubes and...
... physical propertiesof the nanotubes The symmetry groups for carbonnanotubes can be either symmorphic [such as armchair (n,n )and zigzag Physics ofcarbonnanotubes 29 Table Parameters ofcarbonnanotubes ... modes ofcarbon nanotubes: Spectroscopy and theory 129 R S RUOFF and D C KORENTS: Mechanicalandthermalpropertiesofcarbonnanotubes ... on carbonnanotubes We hope this book will contribute to the dissemination of present understanding of the subject and to future developments in the science and technology ofcarbonnanotubes and...
... physical propertiesof the nanotubes The symmetry groups for carbonnanotubes can be either symmorphic [such as armchair (n,n )and zigzag Physics ofcarbonnanotubes 29 Table Parameters ofcarbonnanotubes ... modes ofcarbon nanotubes: Spectroscopy and theory 129 R S RUOFF and D C KORENTS: Mechanicalandthermalpropertiesofcarbonnanotubes ... on carbonnanotubes We hope this book will contribute to the dissemination of present understanding of the subject and to future developments in the science and technology ofcarbonnanotubes and...
... physical propertiesof the nanotubes The symmetry groups for carbonnanotubes can be either symmorphic [such as armchair (n,n )and zigzag Physics ofcarbonnanotubes 29 Table Parameters ofcarbonnanotubes ... modes ofcarbon nanotubes: Spectroscopy and theory 129 R S RUOFF and D C KORENTS: Mechanicalandthermalpropertiesofcarbonnanotubes ... on carbonnanotubes We hope this book will contribute to the dissemination of present understanding of the subject and to future developments in the science and technology ofcarbonnanotubes and...
... sensor response, and times of adsorption/desorption of screenprinted and dip-coated films sensing a flux of 150 mL of N2 with a charge of 1% NH3 Material Fig Optical properties of: (a) dip-coated ... adsorption/desorption, and the direction and amount of charge transfer Fig Photocurrent ratio of dip-coated TiO2 –MWCNT films and TiO2 films as a function of wavelenght The spectral response of TiO2 (broken line) and ... electrochemical and photoelectrochemical energy conversion and storage, synthesis and characterization of composites based in inorganic and organic semiconductors, and nanocarbon materials in energy and...
... to 60 nm (c, d) Raman shift of the G and 2D bands, respectively The positions of both bands are shifted to higher energies The G band is around 1610 cm-1 and the 2D band around 2750 cm-1 This high ... centered at 1582 cm-1, and a 2D band at 2690 cm-1 The average up shift is then of 28 cm-1 for the G band, andof 60 (30) cm-1 for the 2D (D) band, respectively The G and 2D band Raman shift maps are ... D band lies around 1380 cm-1, the G band around 1610 cm-1, and the 2D band around 2750 cm-1 whereas neutral relaxed graphene has a D band around 1350 cm-1, a G band centered at 1582 cm-1, and...
... WA III: Thermal conductivity ofcarbonnanotubes Nanotechnology 2000, 11:65-69 30 Padgett CW, Brenner DW: Influence of chemisorption on the thermal conductivity of single-wall carbonnanotubes ... dispersion and separation ofcarbonnanotubes Nat Mater 2003, 2:338-342 Figure Lattice thermal conductivity of tube (4,2) as a function of temperature Results from the Callaway-Holland model and the ... performance of zigzag and chiral carbonnanotubes Xiaojian Tan1, Huijun Liu*1, Yanwei Wen1, Hongyan Lv1, Lu Pan1, Jing Shi*1, and Xinfeng Tang2 Key Laboratory of Artificial Micro- and Nano-structures of...
... propertiesofcarbonnanotubes 1.1.3 Applications ofcarbonnanotubes 1.2 Motivation 1.3 Objective and scope of work 11 1.4 Layout of the thesis 13 CHAPTER 2: LITERATURE REVIEW 2.1 Buckling of ... bonds where each carbon atom is bonded to other carbon atoms 1.1.2 MechanicalpropertiesofcarbonnanotubesCarbon nanotube is known to possess superior mechanicalproperties These properties have ... achiral carbonnanotubes The latter comprises of both zigzag and armchair carbonnanotubes This categorization is done based on the orientation of carbon- carbon (C-C) bonds Orientation of C-C...
... LIST OF SYMBOLS XV XVII CHAPTER INTRODUCTION 1.1 Background 1.2 CarbonNanotubes 1.2.1 Discovery ofCarbonNanotubes 1.2.2 Bonding Structures ofCarbonNanotubes 1.2.3 PropertiesofCarbonNanotubes ... 29 S Saito and A Zettl, Carbon Nanotubes: Quantum Cylinders of Graphene (Elsevier, UK, 2008) 30 S Reich, C Thomsen, and J Maultzsch, Carbon Nanotubes: Basic Concepts and Physical Properties (Wiley-VCH, ... Schematic illustration of sp1, sp2 and sp3 hybrid carbon orbitals Hybridization determines the type of bonding of the carbon atoms with their types n neighbors, and different types of bonding are responsible...
... emission mass, barrier height of the emitter F is the local field, ε0 is the permittivity of free space, emitters, 21 Chapter Physics of Field Emission and t(y) and υ(y) are the Nordheim elliptic ... electron emission mechanism The slope of the linear region of the F-N plot is a function of both β and Ø, which can be expressed as below by transformation of the Eq (2.3): φ3/ Slope = −6.83 × ... low and high electrical field This deviation might be due to the space charge effects, overheating of the emitter tips or the low concentration of the carriers in the tips, conduction band of...
... temperatures than conventional thermal CVD and that epitaxial growth could be successfully achieved The quality and complexity of the equipment and the diversity and purity of the precursor chemicals ... various materials, including carbonandcarbon related materials (diamond, nanocrystalline diamond and CNTs, etc.) and non -carbon advanced materials, such as GaN, SiC, Ga2O3 and silicon whiskers [18] ... representing the order of diffraction, λ is the wavelength, d is the interplanar spacing of the reflecting (diffracting) plane, and θ is the angle of the incidence andof the diffraction of the radiation...
... covered with amorphous carbon, which is the product of the thermal deposition of hydrocarbon [3] 52 Chapter Synthesis of Vertically-Aligned CarbonNanotubes In terms of other CNT growth approaches, ... Schematic setup of the PECVD system used 55 Chapter Synthesis of Vertically-Aligned CarbonNanotubes 4.3 Results and Discussion 4.3.1 Characterization of the As-Grown CarbonNanotubes Fig 4.2 ... Synthesis of Vertically-Aligned CarbonNanotubes 18 S Hofmann, B Kleinsorge, C Ducati, A C Ferrari, and J Roberson, Diamond Relat Mater 13, 1171 (2004) 19 M Meyyappan, Carbon Nanotubes: Science and...
... low electron affinity and strong mechanicalpropertiesof DLC and the one-dimensional free-standing geometry of CNTs by coating the DLC thin films directly onto the surface of the vertically-aligned ... primarily c composed ofcarbon Fig 6.5 shows the carbon 1s core level XPS spectrum of the film Two peaks with the binding energy (BE) of 284.5 and 285.2 eV confirm a high sp3 content of 126 Chapter ... of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell Nanostructures 6.3.4 FE Performance of the Composite Emitters with Varied Thicknesses of Coating Films The FE properties...
... surface is rather flat and the average diameter of these nanotubes is comparable to that 136 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell ... Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell Nanostructures Fig 6.11 Top and cross-sectional view SEM images of composite emitters (a) and (b) 100 ... Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell Nanostructures with the increase of ambient temperature during emission process, the work function of the...
... Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell Nanostructures 6.4.2 FE Propertiesof the Hydrogenated Composite Emitters The FE J-E curves of the pristine ... layer in air and result in a raised valence band maximum of diamond, in other words, a 143 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell ... Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated CarbonNanotubes Core-Shell Nanostructures Fig 6.15 Carbon 1s core level XPS spectra of the (a) 50 nm ta C coated CNTs and (b) 10...
... “Hydrogenation and its effects on the field emission characteristics of tetrahedral amorphous carbon coated carbonnanotubes Journal of Physical Chemistry C (Accepted) Jun Yu, Kuan He Choo, Lifang Niu, and ... emission propertiesof hydrogenated tetrahedral amorphous carbon/ carbonnanotubes nanostructures” Electrochemical and Solid-State Letters 13, K80 (2010) (selected for publication in Virtual Journal of ... List of Publications J Yu, C H Sow, Andrew T S Wee, and Daniel H C Chua “Enhanced field emission of vertically-aligned core-shell carbonnanotubes with molybdenum oxide encapsulation” Journal of...
... single wall carbonnanotubesCarbon 2002, 40:2043-2061 24 Deng F, Zheng QS, Wang LF: Effects of anisotropy, aspect ratio, and nonstraightness ofcarbonnanotubes on thermal conductivity ofcarbon ... a profound effect on the cross-link density and hence, on the final propertiesof the system Thus, we aimed at studying the effect of two types of carbon- based nanofillers, in particular, nanotubes ... modes of the graphene andof the polymeric matrix plays a dominant role on the thermal conductivities of the liquid and solid states Keywords: carbon nanotubes; graphene; nanocomposites; nanofluids;...
... been obtained for BN and other noncarbon nanotubes as well BN nanotubes share the same sp2 structure ofcarbonnanotubesand thus many mechanicalproperties similarities exist Nanotubes are being ... the mechanicalpropertiesof individual nanotubes [37]; the examination of ‘‘sword and sheath’’ failure modes of MWNTs under axial strain [39]; sharpening, peeling, and ‘‘telescoping’’ ofnanotubes ... propertiesofnanotubesand nanoelectromechanical systems applications Carbonnanotubes are sometimes described conceptually as rolled up sheets of graphene, and, as might be expected, many of the mechanical...
... energy of singlewalled carbonnanotubes Appl Phys Lett 1999, 16:2307-2309 Peigney A, Laurent C, Flahaut E, Bacsa RR, Rousset A: Specific surface area ofcarbonnanotubesand bundles ofcarbonnanotubes ... field of cancer therapy are briefly introduced Physicochemical propertiesof CNTs Carbonnanotubes are a huge cylindrical large molecules consisting of a hexagonal arrangement of sp2 hybridized carbon ... visualization of DNA and proteins on carbonnanotubes Adv Mater 1998, 10:701-703 Vigolo B, Pénicaud A, Coulon C, Sauder C, Pailler R: Macroscopic fibers and ribbons of oriented carbonnanotubes Science...
... polymerization of phenoxybenzoic acids [11] and functionalization of closely related carbon materials such as vapor-grown multi-walled carbon nanofibers (MWCNFs) [12, 13] and multi-walled carbonnanotubes ... Results and Discussion Without purification, most of the as-prepared SWCNTs contain approximately 60–70 wt% of impurities such as carbonaceous fragments, amorphous carbons, and small amount of graphite ... implies the higher purity of SWCNTs The TEM image of the as-received SWCNTs shows that there are large portions of carbonaceous and metallic impurities (Fig 1c) On the other hand, the PPA treated...