Electrical transport properties of calcium-encapsulated single-walled carbon nanotubes realized using calcium plasma

Tetsuhiro Shimizu, Toshiaki Kato, Wataru Oohara, Rikizo Hatakeyama

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Calcium (Ca)-atom-encapsulated single-walled carbon nanotubes (Ca@SWNTs) are successfully formed by an ion irradiation method using Ca plasma. The electrical transport properties of Ca@SWNTs are experimentally investigated under a field-effect transistor configuration in vacuum and air. The conductance of Ca@SWNTs changes markedly compared with that of pristine SWNTs, and Ca@SWNTs exhibit air-stable unipolar n-type semiconductor behavior. This result indicates that Ca atoms are encapsulated in SWNTs and fulfill a crucial role as strong electron donors to SWNTs. A unique feature resembling a p-n junction is also observed in Ca@SWNTs.

Original languageEnglish
Article number02BD05
JournalJapanese journal of applied physics
Volume49
Issue number2 PART 2
DOIs
Publication statusPublished - 2010 Dec 1

ASJC Scopus subject areas

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

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