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Modeling of Decay Rates for Molecules at an Island Surface
Author(s) -
Xiong T.,
Lcung P. T.,
George Thomas F.
Publication year - 1995
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199500035
Subject(s) - chemistry , surface roughness , cluster (spacecraft) , molecule , surface finish , chemical physics , substrate (aquarium) , surface (topology) , fractal , layer (electronics) , molecular physics , composite material , geometry , materials science , geology , organic chemistry , mathematical analysis , oceanography , mathematics , computer science , programming language
Abstract The decay rates for molecules at rough surfaces are studied via an island surface model, with particular emphasis on the effect due to the distribution of surface roughness. Two extreme cases are studied when the surface islands distribute themselves evenly and when they coalesce to form local clusters at the molecule‐substrate interface. The optical properties of the interfacial layer in these two cases are described by the Maxwell‐Garnett and the fractal‐cluster models, respectively. Among other results, it is found that both enhancement and suppression of the surface‐induced decay rates are possible due to the presence of roughness, with more dramatic suppression taking place when the surface islands coalesce to form clusters.