Narrow Diameter Distribution of Horizontally Aligned Single-Walled Carbon Nanotubes Grown Using Size-Controlled Gold Nanoparticles
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概要
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Diameter control of horizontally aligned single-walled carbon nanotubes (SWCNTs) is highly desired for controlling electronic properties and applying SWCNTs to devices. Preparation of size-ordered catalyst nanoparticles is one of the approaches to synthesizing diameter-controlled SWCNTs. We report the narrow size distribution of gold catalyst nanoparticles obtained by thermal annealing. The size of gold nanoparticles on an ST-cut quartz substrate changed dramatically when nanoparticles were annealed in Ar/H<inf>2</inf>atmosphere. Almost all the gold nanoparticles diminished in size to less than 2 nm. More than half of them were under 1 nm. The diameters of SWCNTs synthesized from those nanoparticles were narrowly distributed. The average size of SWCNTs was 0.94\pm 0.07 nm. The size correlation between nanoparticles and SWCNTs smaller than 1 nm suggests the possibility of simultaneous control of orientation and diameter of SWCNTs.
- 2013-03-25
著者
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Homma Yoshikazu
Department Of Physics Tokyo University Of Science
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KATO Hiroki
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Homma Yoshikazu
Department of Physics, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Yamada Kazuki
Department of Applied Chemistry, Institute of Colloid and Interface Science, Science University of Tokyo
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