Portland State University. Department of Physics.
Date of Award
Master of Science (M.S.) in Physics
1 online resource (v, 46 p.)
Molecules -- Models
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.
Xiong, Ting, "Modeling of Decay Rate for Molecules at an Island Surface" (1995). Dissertations and Theses. Paper 5198.