Distance dependence of surface-enhanced resonance Raman enhancement in Langmuir-Blodgett dye multilayers.

摘要: Monolayers of a surface-active dye incorporated into inert matrix material were transferred onto structurally defined silver island films by the Langmuir-Blodgett technique. The dye-containing monolayers spaced from surface accurately known increments deposition spacer monolayers. Surface-enhanced resonance Raman spectra observed molecules as distant six (ca. 16 nm) surface. These results indicate an electromagnetic mechanism is operative in this system contradiction to chemical which would require direct contact between Raman-active species and metal