In the designing of nanoparticle assemblies, directional interactions play a crucial role in controlling the spatial arrangement and orientation of the building blocks. Sophisticated surface ligands facilitate the formation of directional bindings via specific interactions and encoding of surface. Anisotropic building blocks also attracted much attention with their unique geometries and shape constraints. In this article, we combine the steric hindrance of polymeric ligands and the anisotropy of nanoparticles to develop a self-assembly system with precise control of the relative orientation of gold nanospheres on silver nanodiscs. The simple yet versatile strategy produces assemblies with ultrahigh regioselectivity and high yields of each assembly. This study may provide new insights for designing supracolloids with increased complexity and functionality. Studying the optical properties of the bimetallic assemblies with different orientations of plasmonic building blocks may contribute to the understanding of complex plasmonic coupling phenomena.

Regioselective self-assembly of gold nanospheres and silver nanodiscs modulated by block copolymers with steric hindrance

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.