Manipulating the confinement of electromagnetic field in size-specific gold nanoparticles dimers and trimers

摘要: The intriguing light–matter interactions can be governed by controlling the particle size and shape, electromagnetic dielectric properties local environment of metal nanostructures. Amongst different approaches that have been engendered to manipulate light at nanoscale, self-assembly metallic nanostructures with controllable interparticle distances angular orientations, which strongly impact their optical attributes, is one viable avenues exploit utility in a diverse range niche applications. simplest geometrical architectures enable such modulations are dimers changeable trimers an additional degree orientation correlate plasmonic observables observed spectral characteristics. Wet chemical adopted this study for synthesis size-selective gold nanoparticles, appropriate organic linkers judiciously employed induce amongst nanoparticles close proximity each other. combination experimental observations simulations probe revealed electrodynamic coupling effect was very sensitive size, orientations these simple nanoassemblies. capability precisely electric field junctions between plasmon-coupled could pave way application nanoassemblies surface-enhanced spectroscopies sensing