Gate-defined quantum dots on carbon nanotubes

M. J. Biercuk, S. Garaj, N. Mason, J. M. Chow, C. M. Marcus

Research output: Contribution to journalArticlepeer-review


We report the realization of nanotube-based multiple quantum dots that are fully defined and controlled with electrostatic gates. Metallic top-gates are used to produce localized depletion regions in the underlying tubes; a pair of such depletion regions in a nanotube with ohmic contact electrodes defines the quantum dot. Top-gate voltages tune the transparencies of tunnel barriers as well as the electrostatic energies within single and multiple dots. This approach allows precise control over multiple devices on a single tube, and serves as a design paradigm for nanotube-based electronics and quantum systems.

Original languageEnglish (US)
Pages (from-to)1267-1271
Number of pages5
JournalNano letters
Issue number7
StatePublished - Jul 2005
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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