Polarizabilities of adsorbed and assembled molecules: Measuring the conductance through buried contacts

Amanda M. Moore, Sina Yeganeh, Yuxing Yao, Shelley A. Claridge, James M. Tour, Mark A. Ratner, Paul S. Weiss

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We have measured the polarizabilities of four families of molecules adsorbed to Au{111} surfaces, with structures ranging from fully saturated to fully conjugated, including single-molecule switches. Measured polarizabilities increase with increasing length and conjugation in the adsorbed molecules and are consistent with theoretical calculations. For single-molecule switches, the polarizability reflects the difference in substrate-molecule electronic coupling in the ON and OFF conductance states. Calculations suggest that the switch between the two conductance states is correlated with an oxidation state change in a nitro functional group in the switch molecules.

Original languageEnglish (US)
Pages (from-to)7630-7636
Number of pages7
JournalACS nano
Volume4
Issue number12
DOIs
StatePublished - Dec 28 2010

Keywords

  • contacts
  • microwave measurements
  • molecular devices
  • polarizability
  • scanning tunneling microscopy
  • self-assembly
  • single-molecule spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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