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Surface-induced symmetry reduction in molecular switching: asymmetric cis–trans switching of CH3S-Au-SCH3on Au(111)

Jianzhi Gao, Lin Tang, Scott Holmes, Fangsen Li, Richard Palmer Orcid Logo, Quanmin Guo

Nanoscale, Volume: 8, Issue: 47, Pages: 19787 - 19793

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1039/c6nr06864b

Abstract

The cis–trans 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 b...

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Published in: Nanoscale
ISSN: 2040-3364 2040-3372
Published: Royal Society of Chemistry (RSC) 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa49236
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Abstract: The cis–trans 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.
College: Faculty of Science and Engineering
Issue: 47
Start Page: 19787
End Page: 19793

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