Contribution of ZnO to Charge-Transfer Induced Surface-Enhanced Raman Scattering in Au/ZnO/PATP Assembly

摘要

The assembly of metal/semiconductor/molecule was fabricated with gold nanoparticles,ZnO,and 4-ami-nothiophenol(PATP)molecules through the layer-by-layer self-assembly method.Raman spectra of PATP adsorbed on Au/ZnO were considerably enhanced relative to those observed on Au particles alone.By examining the relative enhancement of the nontotally symmetric(b2)modes,this effect is shown to arise from a charge transfer(CT)contribution from the metal to molecule.