Formation of quantum dots in single stranded DNA-wrapped single-walled carbon nanotubes

Y. F. Li, Toshiro Kaneko, R. Hatakeyama

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The transport properties of single-stranded DNA (ssDNA) wrapped single-walled carbon nanotubes (SWNTs) are studied from low to room temperature. Atomic force microscopy reveals a regularly patterned geometry of ssDNA molecules on the surface of SWNTs. Our measurements indicate that the semiconducting behavior of SWNTs is drastically changed after ssDNA modification, showing a clear charge-transfer process at room temperature. At low temperatures single-electron tunneling features are observed up to 80 K, demonstrating clearly that quantum dots in series are created in the SWNTs due to the ssDNA wrapping.

Original languageEnglish
Article number023104
JournalApplied Physics Letters
Volume96
Issue number2
DOIs
Publication statusPublished - 2010 Jan 25

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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