Bridge-bonded methylthiolate on Au(111) observed with the scanning tunneling microscope

Scott Holmes, Jianzhi Gao, Lin Tang, Fangsen Li, Richard E. Palmer, Quanmin Guo

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We report the discovery of bridge-bonded methylthiolate, SCH3 , along the step edges of the Au(111) surface. Real-space imaging with the scanning tunnelling microscope reveals the presence of bridge-bonded SCH3 along both the [1 10] and the [112] oriented step edges. The nearest neighbour distances of SCH3 along these steps are 2a and 3a , respectively. The Au(111) terrace is covered by the usual CH3SAuSCH3 staples. The bridgebonded alkanethiolate is expected to play a rather significant role in the formation of thiol-passivated Au nanoclusters because of the high fraction of atoms in similar low-coordination sites.
Original languageEnglish
Pages (from-to)19486-19491
JournalPhysical Chemistry Chemical Physics
Early online date3 Jul 2018
Publication statusPublished - 7 Aug 2018


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