Molecular detection based on conductance quantization of nanowires

C. Z. Li, H. X. He, A. Bogozi, J. S. Bunch, N. J. Tao

Research output: Contribution to journalArticle

175 Scopus citations

Abstract

We have studied molecular adsorption onto stable metallic nanowires fabricated with an electrochemical method. Upon the adsorption, the quantized conductance decreases, typically, to a fractional value, which may be attributed to the scattering of the conduction electrons by the adsorbates. The further conductance change occurs when the nanowire is exposed to another molecule that has stronger adsorption strength. Because the quantized conductance is determined by a few atoms at the narrowest portion of each nanowire, adsorption of a molecule onto the portion is enough to change the conductance, which may be used for chemical sensors.

Original languageEnglish (US)
Pages (from-to)1333-1335
Number of pages3
JournalApplied Physics Letters
Volume76
Issue number10
DOIs
StatePublished - Mar 6 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Li, C. Z., He, H. X., Bogozi, A., Bunch, J. S., & Tao, N. J. (2000). Molecular detection based on conductance quantization of nanowires. Applied Physics Letters, 76(10), 1333-1335. https://doi.org/10.1063/1.126025