Synthesis and optical properties of cubic gold nanoframes
Gold nanostructures, galvanic replacement, hollow nanostructures, localized surface plasmon resonance, surface-enhanced Raman scattering
This paper describes a facile method of preparing cubic Au nanoframes with open structures via the galvanic replacement reaction between Ag nanocubes and AuCl2 . A mechanistic study of the reaction revealed that the formation of Au nanoframes relies on the diffusion of both Au and Ag atoms. The effect of the edge length and ridge thickness of the nanoframes on the localized surface plasmon resonance peak was explored by a combination of discrete dipole approximation calculations and single nanoparticle spectroscopy. With their hollow and open structures, the Au nanoframes represent a novel class of substrates for applications including surface plasmonics and surface-enhanced Raman scattering.
Tsinghua University Press
Leslie Au,Yeechi Chen,Fei Zhou,Pedro H. C. Camargo,Byungkwon Lim,Zhi-Yuan Li,David S. Ginger,Younan Xia, Synthesis and optical properties of cubic gold nanoframes. NanoRes.2008, 1: 441-449