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Issue 47, 2016
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Surface-induced symmetry reduction in molecular switching: asymmetric cistrans switching of CH3S-Au-SCH3 on Au(111)

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Abstract

The cistrans isomerization of CH3S-Au-SCH3 driven by the tip of the scanning tunneling microscope is investigated at 77 K. CH3S-Au-SCH3 anchored on the Au(111) surface with the S–Au–S axis parallel to the substrate functions as a molecular switch due to the flipping of the CH3 groups. The bonding between CH3S-Au-SCH3 and Au(111) leads to asymmetric isomerization where one of the two methyl groups flips much more effectively than the other, despite the symmetry of CH3S-Au-SCH3. Our findings suggest the possibility of constructing similar molecular switches that can be operated at room temperature and a potential route for fine-tuning of molecular switches in future nanoscale electro-mechanical devices.

Graphical abstract: Surface-induced symmetry reduction in molecular switching: asymmetric cis–trans switching of CH3S-Au-SCH3 on Au(111)

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Publication details

The article was received on 30 Aug 2016, accepted on 04 Nov 2016 and first published on 22 Nov 2016


Article type: Paper
DOI: 10.1039/C6NR06864B
Citation: Nanoscale, 2016,8, 19787-19793
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    Surface-induced symmetry reduction in molecular switching: asymmetric cistrans switching of CH3S-Au-SCH3 on Au(111)

    J. Gao, L. Tang, S. Holmes, F. Li, R. E. Palmer and Q. Guo, Nanoscale, 2016, 8, 19787
    DOI: 10.1039/C6NR06864B

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