Characterization and extremely low defect density hexadecanethiol

Emily A. Weiss, Ryan C. Chiechi, George K. Kaufman, Jennah K. Kriebel, Zhefeng Li, ... Miao Chen, Wolfgang Knoll, Olga I. Vinogradova, and Roger G. Ho...
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1046

Langmuir 1993,9,1046-1050

Characterization of Extremely Low Defect Density Hexadecanethiol Monolayers on Hg Surfaces Alebachew Demoz and D. Jed Harrison* Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2 Received September 8,1992. In Final Form: January 18,1993 Hexadecanethiol(HDT)formsself-assembledmonolayerson static Hg drop electrode (SMDE)surfaces. Films are formed in leas than 1 min and are extremely impermeable, indicating the absence of defects. The onset of Hg oxidation at about 0.4 V vs SCE on a bare SMDE in 0.1 M NaF is shifted anodically by 1V on an HDT-coatedSMDE. The current for R U ( N H ~ )methylviologen, ~~+, benzoquinone,and Fe(CN),? reduction at an HDT-coated SMDE is