Optical Field and Chemical Environment Near the Surface Modified Gold Nanoparticle Assembly Revealed by Two-Photon Induced Photoluminescence and Surface Enhanced Raman Scattering

Gold nanoparticle assemblies significantly enhance optical fields and have been applied for nano-optical devices, biosensing, chemical reactions. The properties of the assembly are, however, less controllable once are fabricated on a solid substrate. An prepared at water-organic solvent interface overcomes this restriction provides flexible photochemical reaction fields. Additionally, physical can be controlled by modification surface. In study, we investigated using two-photon-induced photoluminescence surface-enhanced Raman scattering, demonstrated that field enhancement environment near gold finely surface-modification nanoparticles. was water-hexane with variety surface modifications. Optical were two photon induced enhanced scattering. We