Highly stable Au atomic contacts covered with benzenedithiol under ambient conditions

Daigo Murai, Tomoka Nakazumi, Shintaro Fujii, Yuki Komoto, Kazuhito Tsukagoshi, Carlo Motta, Manabu Kiguchi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The stability of Au atomic contacts under ambient conditions is investigated by measuring the electrical conductance during the self-breaking process. Free standing Au atomic contacts can be kept for more than 100 s after immersion in a 1,4-benzenedithiol (BDT) solution. The average lifetime, that is the amount of time in which the junction remains stable before breaking, is increased from 1.5 s to 12 s due to the metal chemical modification with BDT. By comparing the lifetime of the Au atomic contact covered with BDT and with benzenethiol, we found that the stabilization of the metal atomic contacts stems from the charge transfer from the gold to the molecule. The present results have important implications on the preparation of stable metal atomic contacts and open new directions to fabricate stable nanojunctions at room temperature. This journal is

Original languageEnglish
Pages (from-to)15662-15666
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number29
DOIs
Publication statusPublished - 2014 Aug 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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