Journal ArticleDOI
Effect of supporting layer on growth of carbon nanotubes by thermal chemical vapor deposition
TLDR
In this article, a thin iron catalyst was used as a supporting layer on which a thin carbon nanotube was deposited, and cross-sectional transmission electron microscopy revealed a Stranski-Krastanov mode of iron island growth on tantalum.Abstract:
Selective growth of vertically aligned and highly dense carbon nanotubes was achieved by using thermal chemical vapor deposition via careful selection of a thin catalyst layer and an appropriate supporting layer. It was found that carbon nanotube growth was significantly enhanced when tantalum was used as the supporting layer on which a thin iron catalyst was deposited. Cross-sectional transmission electron microscopy revealed a Stranski-Krastanov mode of iron island growth on tantalum with relatively small contact angles controlled by the relative surface energies of the supporting layer, the catalyst, and their interface. The as-formed iron island morphology promoted vertical growth of carbon nanotubes.read more
Citations
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Journal ArticleDOI
Properties, synthesis, and growth mechanisms of carbon nanotubes with special focus on thermal chemical vapor deposition
TL;DR: Important considerations for in situ characterization and new reactor designs that may enable researchers to better understand the physical growth mechanisms and to optimize the synthesis of CNTs are illustrated, thus contributing to make carbon nanotubes a manufacturing reality.
Journal ArticleDOI
Comparison study of catalyst nanoparticle formation and carbon nanotube growth: Support effect
TL;DR: In this article, a comparison study has been conducted on the formation of catalyst nanoparticles on a high surface tension metal and low surface tension oxide for carbon nanotube (CNT) growth via catalytic chemical vapor deposition (CCVD).
Journal ArticleDOI
Support-Catalyst-Gas Interactions during Carbon Nanotube Growth on Metallic Ta Films
Bernhard C. Bayer,Stephan Hofmann,Carla Castellarin-Cudia,Raoul Blume,Carsten Baehtz,Santiago Esconjauregui,C. T. Wirth,Rachel A. Oliver,Caterina Ducati,Axel Knop-Gericke,Robert Schlögl,Andrea Goldoni,Cinzia Cepek,John Robertson +13 more
TL;DR: In this article, a detailed study of processes and interactions occurring during the Fe-catalyzed chemical vapor deposition of carbon nanotubes on metallic Ta supports is presented, which highlights general material selection criteria for nanotube applications that require a conductive support.
Book ChapterDOI
Single-Walled Carbon Nanotubes
Sebastien Nanot,Nicholas A. Thompson,Ji-Hee Kim,Xuan Wang,William Rice,Erik H. Haroz,Yogeeswaran Ganesan,Cary L. Pint,Junichiro Kono +8 more
TL;DR: In this paper, the structural, electronic, vibrational, optical, transport, mechanical, and thermal properties of single-walled carbon nanotubes (SWCNTs) are described.
Journal ArticleDOI
Investigation of growth dynamics of carbon nanotubes.
TL;DR: The main part of the review is dedicated to the analysis and systematization of the reported results on the investigation of growth dynamics of nanotubes and the growth properties of inner tubes inside SWCNTs.
References
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Journal ArticleDOI
Nanobeam mechanics: Elasticity, strength, and toughness of nanorods and nanotubes
TL;DR: In this paper, the Young's modulus, strength, and toughness of nanostructures are evaluated using an atomic force microscopy (AFM) approach. And the results showed that the strength of the SiC NRs were substantially greater than those found previously for larger SiC structures, and they approach theoretical values.
Journal ArticleDOI
Thermal transport measurements of individual multiwalled nanotubes.
TL;DR: The thermal conductivity and thermoelectric power of a single carbon nanotube were measured using a microfabricated suspended device and shows linear temperature dependence with a value of 80 microV/K at room temperature.
Journal ArticleDOI
Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission Properties
Shou-Shan Fan,Michael Chapline,Nathan R. Franklin,Thomas W. Tombler,Alan M. Cassell,Hongjie Dai +5 more
TL;DR: The synthesis of massive arrays of monodispersed carbon nanotubes that are self-oriented on patterned porous silicon and plain silicon substrates is reported and the mechanisms of nanotube growth and self-orientation are elucidated.
Journal ArticleDOI
High-field electrical transport in single-wall carbon nanotubes
TL;DR: The intrinsic high-field transport properties of metallic single-wall carbon nanotubes are measured using low-resistance electrical contacts and it is shown that the current-voltage characteristics can be explained by considering optical or zone-boundary phonon emission as the dominant scattering mechanism at high field.
Journal ArticleDOI
Atomic-scale imaging of carbon nanofibre growth
Stig Helveg,Carlos López-Cartes,Carlos López-Cartes,Jens Sehested,Poul L. Hansen,Clausen Bjerne Steffen,Jens R. Rostrup-Nielsen,Frank Abild-Pedersen,Jens K. Nørskov +8 more
TL;DR: Time-resolved, high-resolution in situ transmission electron microscope observations of the formation of carbon nanofibres from methane decomposition over supported nickel nanocrystals show that metallic step edges act as spatiotemporal dynamic growth sites and may be important for understanding other types of catalytic reactions and nanomaterial syntheses.
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