Results 231 to 240 of about 9,577 (266)

Terahertz properties of carbon nanotubes antenna arrays

SPIE Proceedings, 2007
A novel nano-antenna for the generation and applications of THz wave is proposed based on the carbon nanotube. The geometric structure and radiation properties of carbon nanotube (CNT) antenna at THz span have been investigated by the finite integral numerical methods. The designed typical CNT antenna arrays (λ=3.0×104nm, L =0.485λ, R =2.712nm, d =0.1λ)
Wei Shi, Yue Wang, Qun Wu, Xue Wang
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Electrodynamics of periodic arrays of carbon nanotubes

2009 11th International Conference on Transparent Optical Networks, 2009
In this paper electromagnetic properties of periodic arrays of single-wall metallic carbon nanotubes (CNs) are presented. Semiclassical model, based on periodic Green's function, which takes into account electromagnetic interaction between nanotubes, is developed.
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Three-dimensional arrays of graphenated carbon nanotubes

Journal of Materials Research, 2012
Abstract
Charles B. Parker, Akshay S. Raut, Billyde Brown, Brian R. Stoner, Jeffrey T. Glass   +4 more
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Physical properties of carbon nanotube sheets drawn from nanotube arrays

Carbon, 2012
Abstract We report mechanical, thermal, and electrical properties of novel sheet materials composed of multiwalled carbon nanotubes, drawn from a CNT array. At low loading there is some slippage of CNTs but at higher loading tensile strength σ 0  = 7.9 MPa and Young’s modulus E  = 310 MPa. The room-temperature thermal conductivity of the CNT sheet
Jan-Hendrik Pöhls, Michel B. Johnson, Mary Anne White, Rachit Malik, Brad Ruff, Chaminda Jayasinghe, Mark J. Schulz, Vesselin Shanov   +7 more
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Wet Purification of Aligned Carbon Nanotube Arrays and Its Impact on the Morphology of the Carbon Nanotube Arrays

Acta Physico-Chimica Sinica, 2008
Abstract A simple acid treatment method was applied to remove the catalyst impurities and other residues contaminated in the vertically aligned carbon nanotube arrays. We demonstrated that acid treatment was an efficient approach for aligned carbon nanotube purification.
L CAO, Y LIU, Y WANG, D WEI, L FU, P HU, H ZHANG, L HUANG, G YU   +8 more
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Ultrahigh Density Alignment of Carbon Nanotube Arrays by Dielectrophoresis

ACS Nano, 2011
We report ultrahigh density assembly of aligned single-walled carbon nanotube (SWNT) two-dimensional arrays via AC dielectrophoresis using high-quality surfactant-free and stable SWNT solutions. After optimization of frequency and trapping time, we can reproducibly control the linear density of the SWNT between prefabricated electrodes from 0.5 SWNT/μm
Shekhar, Shashank, Stokes, Paul, Khondaker, Saiful I.   +2 more
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Visible diffraction from quasi-crystalline arrays of carbon nanotubes

Nanoscale, 2015
Large area arrays of vertically-aligned carbon nanotubes (VACNTs) are patterned in a quasi-crystalline Penrose tile arrangement through electron beam lithography definition of Ni catalyst dots and subsequent nanotube growth by plasma-enhanced chemical vapour deposition.
Timothy P, Butler, Haider, Butt, Timothy D, Wilkinson, Gehan A J, Amaratunga   +3 more
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Nanomechanics of Individual Carbon Nanotubes from Pyrolytically Grown Arrays

Physical Review Letters, 2000
The bending modulus of individual carbon nanotubes from aligned arrays grown by pyrolysis was measured by in situ electromechanical resonance in transmission electron microscopy (TEM). The bending modulus of nanotubes with point defects was approximately 30 GPa and that of nanotubes with volume defect was 2-3 GPa.
Gao, Rui Ping, Wang, Z. L. (Zhong Lin), Bai, Zhigang, de Heer, Walter A., Dai, Liming, Gao, Mei   +5 more
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Degradation and Failure of Field Emitting Carbon Nanotube Arrays

Journal of Nanoscience and Nanotechnology, 2011
It has been observed experimentally that the collective field emission from an array of Carbon Nanotubes (CNTs) exhibits fluctuation and degradation, and produces thermal spikes, resulting in electro-mechanical fatigue and failure of CNTs. Based on a new coupled multiphysics model incorporating the electron-phonon transport and thermo-electrically ...
Mahapatra, Roy D, Sinha, N, Melnik, RVN
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Wafer-Scale Transfer of Vertically Aligned Carbon Nanotube Arrays

Journal of the American Chemical Society, 2014
The first critical step in making vertically aligned carbon nanotube (VACNT)-based thermal interface materials is to transfer the VACNTs on a large scale. Although VACNTs have been transferred by several methods, they were only transferred inadvertently in most cases.
Miao, Wang, Taotao, Li, Yagang, Yao, Huifen, Lu, Qiang, Li, Minghai, Chen, Qingwen, Li   +6 more
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