A simple combinatorial method aiding research on single-walled carbon nanotube growth on substrates

Suguru Noda, Hisashi Sugime, Kei Hasegawa, Kazunori Kakehi, Yosuke Shiratori

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Establishing fabrication methods of carbon nanotubes (CNTs) is essential to realize many applications expected for CNTs. Catalytic growth of CNTs on substrates by chemical vapor deposition (CVD) is promising for direct fabrication of CNT devices, and catalyst nanoparticles play a crucial role in such growth. We have developed a simple method called "combinatorial masked deposition (CMD)", in which catalyst particles of a given series of sizes and compositions are formed on a single substrate by annealing gradient catalyst layers formed by sputtering through a mask. CMD enables preparation of hundreds of catalysts on a wafer, growth of single-walled CNTs (SWCNTs), and evaluation of SWCNT diameter distributions by automated Raman mapping in a single day. CMD helps determinations of the CVD and catalyst windows realizing millimeter-tall SWCNT forest growth in 10 min, and of growth curves for a series of catalysts in a single measurement when combined with realtime monitoring. A catalyst library prepared using CMD yields various CNTs, ranging from individuals, networks, spikes, and to forests of both SWCNTs and multi-walled CNTs, and thus can be used to efficiently evaluate self-organized CNT field emitters, for example. The CMD method is simple yet effective for research of CNT growth methods.

元の言語English
記事番号02BA02
ジャーナルJapanese journal of applied physics
49
発行部数2 PART 2
DOI
出版物ステータスPublished - 2010 12 1

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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