作者
Dana M Alloway, Michael Hofmann, Darrin L Smith, Nadine E Gruhn, Amy L Graham, Ramon Colorado Jr, Vicki H Wysocki, T Randall Lee, Paul A Lee, Neal R Armstrong
发表日期
2003/10/23
期刊
The Journal of Physical Chemistry B
卷号
107
期号
42
页码范围
11690-11699
出版商
American Chemical Society
简介
Gold surfaces modified with C3−C18-alkanethiols (CH3(CH2) X - 1SH; H X SH; x = 3, 8, 12, 16, 18) and C16-alkanethiols, fluorinated at the outer 1, 2, 4, and 10 methylene positions (CF3(CF2) Y - 1(CH2) X SH; F y H x SH; y = 1, x = 15; y = 2, x = 14; y = 4, x = 12; y = 10, x = 6) were characterized by He(I) UV-photoelectron spectroscopy (UPS). (Detailed X-ray photoelectron spectroscopic characterization of the partially fluorinated thin films is given in the Supporting Information). Long incubation times of the gold surface with the alkanethiol solutions lead to compact monolayer films for all of the alkanethiols, as indicated by the exponential decrease in emission intensity versus alkyl chain length for both the gold Fermi edge (UPS data), and by a parallel decrease in Au(4f) photoemission intensity using X-ray photoelectron spectroscopy. Changes in the effective work …
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