SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures.

摘要: The optical properties of nanoparticle assemblies can be tailored via hybridization plasmon modes. Isotropic core/satellite superstructures made spherical nanoparticles are known to exhibit coupled modes with a strongly scattering (radiative) character, and provide hot spots yielding high activity in surface-enhanced Raman (SERS). However, complement this functionality plasmonic heating, additional absorbing (non-radiative) required. We introduce herein anisotropic formed by decorating central nanorod satellite nanoparticles, which feature two that allow application for both SERS heating. On the basis diffuse reflectance spectroscopy, small-angle X-ray (SAXS), electromagnetic simulations, origin is disclosed thus serves as toward alternative designs functional superstructures. This work represents proof-of-principle combination efficiency efficient heating near-infrared irradiation.