Determination of single molecule conductances of alkanedithiols by conducting-atomic force microscopy with large gold nanoparticles

Tomoyuki Morita, Stuart Lindsay

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90 Citations (Scopus)

Abstract

Single molecular conductances of alkanethiols with different lengths were determined by conducting-atomic force microscopy with large gold nanoparticles (5.4 nm diameter) as the contact. Because of the large size of the nanoparticles, the Coulomb blockade effect is small and the quantized level effect is negligible. These effects were the problems with small nanoparticles (1.5 nm) in analysis of the current-voltage data. Therefore, the measurements with large nanoparticles gave the reasonable conductances and reasonable distance dependence that agree well with the scanning tunneling microscopy repeated break-junction results.

Original languageEnglish (US)
Pages (from-to)7262-7263
Number of pages2
JournalJournal of the American Chemical Society
Volume129
Issue number23
DOIs
StatePublished - Jun 13 2007

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Atomic Force Microscopy
Gold
Nanoparticles
Atomic force microscopy
Molecules
Scanning Tunnelling Microscopy
Coulomb blockade
Scanning tunneling microscopy
Electric potential

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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abstract = "Single molecular conductances of alkanethiols with different lengths were determined by conducting-atomic force microscopy with large gold nanoparticles (5.4 nm diameter) as the contact. Because of the large size of the nanoparticles, the Coulomb blockade effect is small and the quantized level effect is negligible. These effects were the problems with small nanoparticles (1.5 nm) in analysis of the current-voltage data. Therefore, the measurements with large nanoparticles gave the reasonable conductances and reasonable distance dependence that agree well with the scanning tunneling microscopy repeated break-junction results.",
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AB - Single molecular conductances of alkanethiols with different lengths were determined by conducting-atomic force microscopy with large gold nanoparticles (5.4 nm diameter) as the contact. Because of the large size of the nanoparticles, the Coulomb blockade effect is small and the quantized level effect is negligible. These effects were the problems with small nanoparticles (1.5 nm) in analysis of the current-voltage data. Therefore, the measurements with large nanoparticles gave the reasonable conductances and reasonable distance dependence that agree well with the scanning tunneling microscopy repeated break-junction results.

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