Enhanced semiconductor nanocrystal conductance via solution grown contacts

Matthew T. Sheldon, Pau Emile Trudeau, Taleb Mokari, Lin Wang Wang, A. Paul Alivisatos

Research output: Contribution to journalArticlepeer-review

120 Scopus citations


We report a 100000-fold increase In the conductance of individual CdSe nanorods when they are electrically contacted via direct solution phase growth of Au tips on the nanorod ends. Ensemble UV-vis and X-ray photoelectron spectroscopies indicate this enhancement does not result from alloying of the nanorod. Rather, low temperature tunneling and high temperature (250-400 K) thermionic emission across the junction at the Au contact reveal a 75% lower interface barrier to conduction compared to a control sample. We correlate this barrier lowering with the electronic structure at the Au-CdSe interface. Our results emphasize the importance of a nanocrystal surface structure for robust device performance and the advantage of this contact method.

Original languageEnglish
Pages (from-to)3676-3682
Number of pages7
JournalNano Letters
Issue number11
StatePublished - 11 Dec 2009
Externally publishedYes

ASJC Scopus subject areas

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


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