On the Counter‐intuitive Heterogeneous Electron Transfer Barrier Properties of Alkanethiolate Monolayers on Gold: Smooth versus Rough Surfaces

John‐Bruce D. Green; Eamonn Clarke; Marc D. PorterChristie A. McDermottMark T. McDermottChuan‐Jian ZhongAdam Johan Bergren

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On the Counter‐intuitive Heterogeneous Electron Transfer Barrier Properties of Alkanethiolate Monolayers on Gold: Smooth versus Rough Surfaces

机译：On the Counter‐intuitive Heterogeneous Electron Transfer Barrier Properties of Alkanethiolate Monolayers on Gold: Smooth versus Rough Surfaces

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Abstract Alkanethiolate monolayers formed on rough gold surfaces can, somewhat surprisingly, act as stronger barriers to heterogeneous electron transfer than those on smooth gold surfaces. This paper presents a possible explanation for this observation by constructing simple geometric models of a “rough” and “smooth” gold surface to examine how microscopic roughness differences can affect the nucleation/growth of the adlayer and size/density of structural defects. Expectedly, the number of defects predicted for adlayers formed on smooth gold is lower than any of those for rough gold. The counter‐intuitive result is that the sizes of a small portion of the defects in the adlayer on the smooth surface are larger than any of those found on the rough surface. The potential implications of these results are discussed.

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来源
《Electroanalysis》 |2022年第12期|1936-1952|共17页
作者
John‐Bruce D. Green; Eamonn Clarke; Marc D. PorterChristie A. McDermottMark T. McDermottChuan‐Jian ZhongAdam Johan Bergren;
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作者单位

Illinois Institute of Technology;

University of Utah;

University of AlbertaState University of New York at BinghamtonUniversity of British;

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正文语种英语
中图分类电化学、电解、磁化学;
关键词
alkanethiol monolayers; nucleation and growth; defects; barrier to electron transfer; surface roughness;

On the Counter‐intuitive Heterogeneous Electron Transfer Barrier Properties of Alkanethiolate Monolayers on Gold: Smooth versus Rough Surfaces

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