A distance dependence study of the surface enhanced Raman effect has been performed using alkanethiol CH3(CH2)(n)SH self-assembled monolayers on top of rough silver surfaces. We found a decrease of the enhancement signal of the CH3 heads by a factor of 2, increasing the CH3-surface distance from 0.8 to 2.5 nm (n = 5-17) and a distance function compatible with the known Gersten and Nitzan theory on the electromagnetic enhancement. Parameters obtained by an experimental data fit agree with previous observations on silver surface morphology.
Distance dependence of surface enhanced Raman scattering probed by alkanethiol self-assembled monolayers
COMPAGNINI, Giuseppe Romano;
1999-01-01
Abstract
A distance dependence study of the surface enhanced Raman effect has been performed using alkanethiol CH3(CH2)(n)SH self-assembled monolayers on top of rough silver surfaces. We found a decrease of the enhancement signal of the CH3 heads by a factor of 2, increasing the CH3-surface distance from 0.8 to 2.5 nm (n = 5-17) and a distance function compatible with the known Gersten and Nitzan theory on the electromagnetic enhancement. Parameters obtained by an experimental data fit agree with previous observations on silver surface morphology.File in questo prodotto:
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