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- W1991475339 abstract "We report on the lifetime and motional dynamics of Zirconium Phosphonate (ZP) monolayers containing oligothiophene chromophores in a range of concentrations. Monolayers were formed on fused silica substrates and on a 15 A oxide layer formed on crystalline Si(100) substrates. For both interfaces, the fluorescence lifetime behavior of the chromophores is identical and does not depend on chromophore concentration within the monolayer. Transient anisotropy measurements reveal that, for both substrates, the chromophores are oriented at ∼35° with respect to the surface normal. For monolayers formed on silica, there is no evidence for chromophore motion, while motion is seen for monolayers formed on silicon. Despite the substantial similarity between the two families of monolayers, the surface roughness of the primed silicon substrate allows for greater motional freedom of the chromophores in the monolayers. We discuss these findings in the context of the differences in substrate surface roughness and domain siz..." @default.
- W1991475339 created "2016-06-24" @default.
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- W1991475339 date "1998-06-05" @default.
- W1991475339 modified "2023-09-23" @default.
- W1991475339 title "The Role of Substrate Identity in Determining Monolayer Motional Relaxation Dynamics" @default.
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- W1991475339 doi "https://doi.org/10.1021/ja972574i" @default.
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