physics of carbon nanotubes
CARBON NANOTUBES 2012 pptx
... properties of the nanotubes The symmetry groups for carbon nanotubes can be either symmorphic [such as armchair (n,n)and zigzag Physics of carbon nanotubes 29 Table Parameters of carbon nanotubes ... progress in research on carbon nanotubes and related materials 'The birth of the field of carbon nanotubes is marked by the publication by Iijima of the observation of multi-walled nanotubes with outer ... of the method is studied in detail The elimination of amorphous carbon is also investigated INTRODUCTION The catalytic growth of graphitic carbon nanofibers during the decomposition of hydrocarbons...
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CARBON NANOTUBES ppt
... properties of the nanotubes The symmetry groups for carbon nanotubes can be either symmorphic [such as armchair (n,n)and zigzag Physics of carbon nanotubes 29 Table Parameters of carbon nanotubes ... progress in research on carbon nanotubes and related materials 'The birth of the field of carbon nanotubes is marked by the publication by Iijima of the observation of multi-walled nanotubes with outer ... of the method is studied in detail The elimination of amorphous carbon is also investigated INTRODUCTION The catalytic growth of graphitic carbon nanofibers during the decomposition of hydrocarbons...
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CARBON NANOTUBES pot
... properties of the nanotubes The symmetry groups for carbon nanotubes can be either symmorphic [such as armchair (n,n)and zigzag Physics of carbon nanotubes 29 Table Parameters of carbon nanotubes ... progress in research on carbon nanotubes and related materials 'The birth of the field of carbon nanotubes is marked by the publication by Iijima of the observation of multi-walled nanotubes with outer ... of the method is studied in detail The elimination of amorphous carbon is also investigated INTRODUCTION The catalytic growth of graphitic carbon nanofibers during the decomposition of hydrocarbons...
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CARBON NANOTUBES.Elsevier Journals of Related Interest Applied Superconductivity Carbon Journal pdf
... properties of the nanotubes The symmetry groups for carbon nanotubes can be either symmorphic [such as armchair (n,n)and zigzag Physics of carbon nanotubes 29 Table Parameters of carbon nanotubes ... progress in research on carbon nanotubes and related materials 'The birth of the field of carbon nanotubes is marked by the publication by Iijima of the observation of multi-walled nanotubes with outer ... of the method is studied in detail The elimination of amorphous carbon is also investigated INTRODUCTION The catalytic growth of graphitic carbon nanofibers during the decomposition of hydrocarbons...
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sensor response of sol–gel multiwalled carbon nanotubes-tio2 composites
... 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 films, ... size of titania symbols are representative of the lack (white) or abundance (yellow) of Ti3+ states and of the crystallite size obtained by XRD; the size of the arrows illustrate the magnitude of ... the identification of small changes in the patterns of the composite films; the narrower and more symmetric shape of the MWCNT peak at 2Â = 26◦ indicates the lost of amorphous carbon after functionalization...
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Báo cáo hóa học: " Multiscale investigation of graphene layers on 6H-SiC(000-1)" pot
... top It can also be stated that the edges of the Figure STM images of the edges of the graphene islands (a) 23 × 23 nm2 STM image of a monolayer on top of the (3 × 3) SiCreconstructed surface This ... -1 comes from the breakdown of the wavevector selection rule and reveals the presence of crystalline defects inside or at the edges of FLG flakes The in-plane size of the crystallites can be deduced ... http://www.nanoscalereslett.com/content/6/1/171 Page of (a) (b) (c) (d) Figure STM images of a 6H-SiC(000-1) sample after graphitization (same sample as in figure 1) (a) 300 × 300 nm2 STM image of few layers of graphene grown...
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báo cáo hóa học:" Optimizing the thermoelectric performance of zigzag and chiral carbon nanotubes" pdf
... Thermal conductivity of carbon nanotubes Nanotechnology 2000, 11:65-69 30 Padgett CW, Brenner DW: Influence of chemisorption on the thermal conductivity of single-wall carbon nanotubes Nano Lett ... dynamics of singlewalled carbon nanotubes Phys Rev B 2003, 67:045413 33 Esfarjani K, Zebarjadi M, Kawazoe Y: Thermoelectric properties of a nanocontact made of two-capped single-wall carbon nanotubes ... thermoelectric properties of a series of zigzag and chiral carbon nanotubes which exhibit interesting diameter and chirality dependence Our calculated results indicate that these carbon nanotubes could...
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Modeling and simulation of buckling of pristine and defective carbon nanotubes
... properties of carbon nanotubes 1.1.3 Applications of carbon nanotubes 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 CNTs ... achiral carbon nanotubes The latter comprises of both zigzag and armchair carbon nanotubes This categorization is done based on the orientation of carbon- carbon (C-C) bonds Orientation of C-C ... the shape of a cylinder Depending on the geometry of CNT, the following categories of CNT can be found Single-walled and multi-walled carbon nanotubes CNTs as single-walled carbon nanotubes (SWNTs)...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 1
... Background 1.2 Carbon Nanotubes 1.2.1 Discovery of Carbon Nanotubes 1.2.2 Bonding Structures of Carbon Nanotubes 1.2.3 Properties of Carbon Nanotubes 1.2.4 Applications of Carbon Nanotubes 2 13 ... through these years ii Table of Contents Table of Contents ACKNOWLEDGEMENTS TABLE OF CONTENTS ABSTRACT I III VII LIST OF TABLES IX LIST OF FIGURES X LIST OF ABBREVIATIONS LIST OF SYMBOLS XV XVII CHAPTER ... Carbon Nanotubes 4.3.2 Catalytic Growth Mechanism of Carbon Nanotubes 4.3.3 Function of Metal Catalyst in CNT Growth 4.3.4 Growth Rate of Carbon Nanotubes with Fe Catalyst 56 56 60 62 66 4.4 Summary...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 2
... constant, Ø is the 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 ... electrons so as to enhance the FE performance of the semiconductors 23 Chapter Physics of Field Emission Fig 2.3 Energy band bending near the surface of a semiconductor induced by the external electrical ... space charge effects, overheating of the emitter tips or the low concentration of the carriers in the tips, conduction band of semiconductors [15-17] FE properties of semiconductors could on 17]...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 3
... spectrum of a mixture of elements is approximately the sum of the peaks of the individual constituents Generally, identification of chemical states can be made from exact measurements of peak ... 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 and of the diffraction of the radiation ... The use of a magnetic field in the magnetrons behind the metal target is capable of trapping electrons near cathode such that the plasma density will be much higher, often by an order of magnitude...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 4
... covered with amorphous carbon, which is the product of the thermal deposition of hydrocarbon [3] 52 Chapter Synthesis of Vertically-Aligned Carbon Nanotubes In terms of other CNT growth approaches, ... Schematic setup of the PECVD system used 55 Chapter Synthesis of Vertically-Aligned Carbon Nanotubes 4.3 Results and Discussion 4.3.1 Characterization of the As-Grown Carbon Nanotubes Fig 4.2 ... the hollow part of Fig 4.4 TEM images of the as-grown CNTs obtained with Fe catalyst 58 Chapter Synthesis of Vertically-Aligned Carbon Nanotubes the nanotube that a few layers of graphene sheets...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6a
... Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures neighbors giving rise to three-dimensional interconnected structure of carbon atoms ... the binding energy (BE) of 284.5 and 285.2 eV confirm a high sp3 content of 126 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures ... (eV) Fig 6.5 Carbon 1s core level XPS spectrum confirms high sp3 content of the DLC films 127 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6b
... Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures of the pristine CNTs Hence, it is reasonable to assume that the coated tips of these nanotubes ... flat and the average diameter of these nanotubes is comparable to that 136 Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures ... Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures with the increase of ambient temperature during emission process, the work function of the...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 6c
... Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures 6.4.2 FE Properties of the Hydrogenated Composite Emitters The FE J-E curves of the pristine ... Chapter Field Emission Study of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures Fig 6.15 Carbon 1s core level XPS spectra of the (a) 50 nm ta C coated ... Carbon Coated Carbon Nanotubes Core-Shell Nanostructures performance of the emitters and there exists an optimum thickness of the ta-C coating film, i.e., 50 nm in this case With the change of...
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Study of field emission characteristics of ultrathin film coated carbon nanotubes core shell structures 7
... characteristics of tetrahedral amorphous carbon coated carbon nanotubes Journal of Physical Chemistry C (Accepted) Jun Yu, Kuan He Choo, Lifang Niu, and Daniel H C Chua “Synthesis of three-dimensional ... of amorphous carbon films containing nano-graphene clusters” Submitted to Applied Physics Letters H Y Wang, Z Tan, J Yu, and Daniel H C Chua “Enhancement of field emission by coating carbon nanotubes ... 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 carbon nanotubes with molybdenum oxide encapsulation” Journal of...
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Báo cáo hóa học: " Thermal conductivity of carbon nanotubes and graphene in epoxy nanofluids and nanocomposites" pptx
... 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...
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carbon nanotubes. quantum cylinders of graphene, 2008, p.220
... chromatographically purified, giving rise to many kinds of new crystalline carbon phases [3] In the case of carbon nanotubes, existence of many kinds of nanotubes in various samples has also been confirmed ... role of essential importance in the field of carbon nanotubes as will be reviewed in this chapter, in which an overview of theories applied to carbon nanotubes is presented and the advantages of ... Saito Fig Carbon nanotubes There are two kinds of achiral nanotubes called ‘‘zigzag nanotubes ’ (left) and ‘‘armchair nanotubes ’ (center) The remaining nanotubes are called ‘‘chiral nanotubes ’...
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Báo cáo hóa học: " The application of carbon nanotubes in target drug delivery systems for cancer therapies" docx
... 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...
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Báo cáo hóa học: " Grafting of 4-(2,4,6-Trimethylphenoxy)benzoyl onto Single-Walled Carbon Nanotubes in Poly(phosphoric acid) via Amide Function" pot
... 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 carbon nanotubes ... 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 and metal catalysts ... 1550–1600 cm-1 region of spectrum is due to the tangential C–C stretching of SWCNT carbon atoms [25] The ID/IG value of the TMPBA-g-SWCNT was 1.3, which was much lower than 5.0 of the PPA treated...
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