Cesium encapsulation in single-Walled carbon nanotubes via plasma ion irradiation: Application to junction formation and ab initio investigation

H. Jeong, A. Farajian, R. Hatakeyama, T. Hirata, T. Yaguchi, K. Tohji, H. Mizuseki, Y. Kawazoe

Research output: Contribution to journalArticlepeer-review

115 Citations (Scopus)

Abstract

Using an approach different from the conventional vapor doping methods, Cs positive ions in a magnetized-plasma column are irradiated upon a negatively biased substrate which is covered with dispersed single-walled carbon nanotubes (SWNTs). The Cs ions are evidently observed inside SWNTs by the Z-contrast method in scanning transmission electron microscopy, demonstrating the formation of alkali-metal encapsulating SWNTs. Ab initio band structures and density of states for the light and heavy doping regimes indicate the possibility of using Cs-doped SWNTs as doped junctions, with potential application in nanoelectronics. This is supported by the direct experimental observation of an actual junction.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number7
DOIs
Publication statusPublished - 2003 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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