Synthesis of Finger-like Hyper-branched Gold Nanostructures and its Linear Optical Properties

Abstract

In this work we have reported synthesis of finger-like hyper-branched Au nanostructures by seed mediated growth where multiple-twinned nanoparticles played an important role in the growth process. Cyclic multiple twinned particles showed a regular polyhedron structure due to the involvement of different growth processes and results in unique shape evolution on specific surface which depends on the specific formation modes and on the particular structure of the twin-related subunits. The formation of finger-like hyper-branched Au nanostructures has been confirmed by HRTEM images and also it has been found that the synthesized nanostructures exhibit interesting linear optical absorption and enhanced (by 175%) visible photoluminescence emission properties.