Single molecule conductance through rigid norbornylogous bridges with zero average curvature

Wenrong R. Yang, Michael W. Jones, Xiulan Li, Paul K. Eggers, Nongjian Tao, J. Justin Gooding, Michael N. Paddon-Row

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A new homologous series of norbomylogous (NB) bridges has been synthesized in which the average curvature of the bridges is very small. The molecules are rigid and have two thiol moieties at each end to allow them to form self-assembled monolayers (SAMs) and to connect to two gold electrodes to form a molecular junction. The SAMs formed were characterized using electrochemistry to determine the surface coverage of molecules on gold surface and to provide an indication of the packing of the NB bridges while ellipsometry and X-ray photoelectron spectroscopy (XPS) were used to provide an indication of the SAM thickness and orientation. Single molecule conductance of NB bridges was measured as a function of the molecular length. The conductance was found to decrease exponentially with the length with a decay constant that is exactly correlated with photoelectron transfer and other studies at the multiple molecule level. The molecule-electrode contact resistance was determined and compared with that of related alkanedithiol molecular junctions.

Original languageEnglish (US)
Pages (from-to)9072-9080
Number of pages9
JournalJournal of Physical Chemistry C
Volume112
Issue number24
DOIs
StatePublished - Jun 19 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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