Effect of Ambient Gas on the Catalytic Properties of Au in Single-Walled Carbon Nanotube Growth
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概要
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We investigated the effects of ambient gases on the catalytic properties of Au in the synthesis of single-walled carbon nanotubes (SWCNTs). We found that H2 could effectively activate the Au catalyst during both the pretreatment stage and the chemical vapor deposition (CVD) process, and increase the nucleation density of SWCNTs. When Au is used as catalyst, a H2 atmosphere is crucial for the synthesis of high-density SWCNTs. At the same time, it is also found that heating in air during pretreatment can efficiently remove contaminant carbon and improve the purity of the resulting SWCNTs. Furthermore, an air atmosphere during annealing treatment can suppress the agglomeration of Au particles, which is useful for synthesizing high-density nanotubes.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-04-25
著者
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HOMMA Yoshikazu
CREST, JST
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Chokan Tomohito
Department Of Physics Tokyo University Of Science
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Chiashi Shohei
Department Of Mechanical Engineering The University Of Tokyo
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Takagi Daisuke
Department Of Internal Medicine Hyogo Prefectural Nishinomiya Hospital
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Ohno Hiroshi
Department Of General Medicine Rakuwakai Otowa Hospital
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Liu Huaping
Department Of Electrical Engineering And Computer Sciences Oregon State University
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Chiashi Shohei
Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Chokan Tomohito
Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Ohno Hiroshi
Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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TAKAGI Daisuke
Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University
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