Versatile control of carbon nanotube semiconducting properties by DNA encapsulation using electrolyte plasmas

Toshiro Kaneko, Rikizo Hatakeyama

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Electrical properties of semiconducting single-walled carbon nanotubes (SWNTs) are controlled by encapsulating DNA into their inner nano-spaces using an ion irradiation method in electrolyte plasmas. Especially, DNA with guanine can drastically change the p-type characteristic of pristine SWNTs into the n-type characteristic, while DNA with cytosine just enhances the p-type characteristic. By measuring ultraviolet photoelectron spectra of SWNTs and DNA, it is clarified that the ionization potential of SWNTs is larger than that of DNA with guanine. This difference causes the charge transfer from DNA to SWNTs, resulting in the n-type semiconducting properties of the guanine encapsulated SWNTs.

Original languageEnglish
Article number127001
JournalApplied Physics Express
Volume2
Issue number12
DOIs
Publication statusPublished - 2009 Dec

ASJC Scopus subject areas

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

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