Colloidal Assembly of Plasmonic Superstructures

Nanocluster formed by the ordered assembly of noble metal nanoparticles, which is called as superstructure, can exhibit plasmonic characteristics beyond those of individual nanoparticles, and can be tuned by adjusting the size, shape, chemical composition, and arrangement of individual nanoparticles. Colloidal assembly as a cost-efficient approach can be widely used for fabrication of plasmonic superstructure in solution media for diverse applications. The central focus of this presentation is the effect of polymer modification on the colloidal assembly of superstructures and their plasmonic properties for sensing application. The main content is basically divided into three parts: (I) the topological effect of polymer structure parameters on plasmonic properties for colorimetric analytics; (II) the impact of nanoparticle spacing within the superstructure and polymer dimensions on the surface enhanced Raman scattering (SERS); (III) the plasmonic properties tailoring of superstructures as well as the contribution of scattering (radiative part) and absorption (non-radiative part) within the ensemble optical response.