New insights for self-assembled monolayers of organothiols on Au(111) revealed by scanning tunneling microscopy

Guohua Yang, Gang-yu Liu

Research output: Contribution to journalArticle

256 Scopus citations

Abstract

In the past decade, scanning tunneling microscopy (STM) has revealed new information regarding self-assembled monolayers (SAMs) of organothiols on Au(111) at the molecular level. The periodicity, defects, morphology, and various phases during the self-assembly process have been visualized with unprecendented detail. Using STM under ultrahigh vacuum, new insights regarding SAMs have been revealed from the perspective of potential applications in molecular devices. This article focuses on a molecular-level understanding of the formation of adatom and vacancy islands and reveals how the structure is impacted by introducing aromatic termini. The thermal stability and thermally induced structural evolution of SAMs are monitored in situ. The behavior of alkanethiol molecules under local electric field and tunneling current are studied with molecular resolution. Molecular-level insight regarding negative differential resistance of SAMs is also discussed.

Original languageEnglish (US)
Pages (from-to)8746-8759
Number of pages14
JournalJournal of Physical Chemistry B
Volume107
Issue number34
StatePublished - Aug 28 2003

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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