نتایج جستجو برای: vertically aligned carbon nanotubes

تعداد نتایج: 328620  

Journal: :ACS nano 2012
Eswaramoorthi Iyyamperumal Shuangyin Wang Liming Dai

Using a chemical vapor deposition method, we have synthesized vertically aligned BCN nanotubes (VA-BCNs) on a Ni-Fe-coated SiO(2)/Si substrate from a melamine diborate precursor. The effects of pyrolysis conditions on the morphology and thermal property of grown nanotubes, as well as the nanostructure and composition of an individual BCN nanotube, were systematically studied. It was found that ...

2013
Nisha Mohan Justine Cheng Julia R. Greer Alan Needleman

Motivated by a model that qualitatively captured the response of vertically aligned carbon nanotube (VACNT) pillars in uniaxial compression, we consider the uniaxial tensile response of a class of compressible elastic-viscoplastic solids. In Hutchens et al. [“Analysis of Uniaxial Compression of Vertically Aligned Carbon Nanotubes,” J. Mech. Phys. Solids, 59, pp. 2227–2237 (2011), Erratum 60, 17...

Journal: :Science 2005
Anyuan Cao Pamela L Dickrell W Gregory Sawyer Mehrdad N Ghasemi-Nejhad Pulickel M Ajayan

We report that freestanding films of vertically aligned carbon nanotubes exhibit super-compressible foamlike behavior. Under compression, the nanotubes collectively form zigzag buckles that can fully unfold to their original length upon load release. Compared with conventional low-density flexible foams, the nanotube films show much higher compressive strength, recovery rate, and sag factor, an...

2012
Sungjin Kim Shinya Aikawa Pei Zhao Erik Einarsson Shohei Chiashi Shigeo Maruyama

We describe a transparent and flexible field-effect transistor (FET) made from graphene and single-walled carbon nanotubes (SWNT) hybrid system. Graphene and vertically aligned SWNTs simultaneously grown by alcohol catalytic chemical vapor deposition (ACCVD) were employed as channel and source-drain electrode, respectively. Gate electrode was also made of SWNTs separated with a thin poly(vinyl ...

2010
V. A. Labunov B. G. Shulitski A. L. Prudnikava Y. P. Shaman A. S. Basaev

The carbon nanostructure composed of an array of vertically aligned carbon nanotubes (CNTs) and a planar graphite layer (PGL) located at the top of the array has been obtained by the injection chemical vapor deposition method, realized using high temperature catalytic pyrolysis of xylene-ferrocene mixture. The carbon nature of the planar layer was identified using Auger electron spectroscopy. S...

Journal: :Science 2004
Kenji Hata Don N Futaba Kohei Mizuno Tatsunori Namai Motoo Yumura Sumio Iijima

We demonstrate the efficient chemical vapor deposition synthesis of single-walled carbon nanotubes where the activity and lifetime of the catalysts are enhanced by water. Water-stimulated enhanced catalytic activity results in massive growth of superdense and vertically aligned nanotube forests with heights up to 2.5 millimeters that can be easily separated from the catalysts, providing nanotub...

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