Research Article

Nano Research

, Volume 2, Issue 10, pp 793-799

Open Access This content is freely available online to anyone, anywhere at any time.

Single-walled carbon nanotube growth with non-iron-group “catalysts” by chemical vapor deposition

  • Yoshikazu HommaAffiliated withDepartment of Physics, Tokyo University of Science Email author 
  • , Huaping LiuAffiliated withDepartment of Physics, Tokyo University of Science
  • , Daisuke TakagiAffiliated withNTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation
  • , Yoshihiro KobayashiAffiliated withNTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation

Abstract

Various materials have been found to “catalyze” carbon nanotube growth in chemical vapor deposition (CVD) when they become nano-sized particles. These involve not only metals, such as Pd, Pt, Au, Ag, and Cu, but also semiconductors, such as Si, Ge, and SiC. Alumina and diamond nanoparticles also produce carbon nanotubes. These “catalysts”, which are better called “seeds”, can be categorized into two types: one type forms a eutectic liquid or highly-mobile alloy with carbon, and carbon atoms precipitate from the eutectic alloy; the other type remains as a solid phase and form a carbon surface layer during CVD growth. In this paper, we review recent studies of SWCNT growth with these non-iron-group materials and highlight the mechanisms involved.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-009-9082-z/MediaObjects/12274_2009_9082_Fig1_HTML.jpg

Keywords

Carbon nanotube catalyst seed growth mechanism chemical vapor deposition vapor-liquid-solid mechanism