title: Controllable conversion of plasmonic Cu2-xS nanoparticles to Au2S by cation exchange and electron beam induced transformation of Cu2-xS-Au2S core/shell nanostructures.
abstract: Self-doped Cu2-xS nanocrystals (NCs) were converted into monodisperse Cu2-xS-Au2S NCs of tunable composition, including pure Au2S, by cation exchange. The near-infrared (NIR) localized surface plasmon resonance (LSPR) was dampened and red-shifted with increasing Au content. Cation exchange was accompanied by elimination of cation vacancies and a change in crystal structure. Partially exchanged Cu2-xS-Au2S core/shell structures evolved to dumbbell-like structures under electron irradiation in the transmission electron microscope (TEM).
authors: Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, New York 14260-4200, USA. swihart@buffalo.edu.
authors: Xianliang
authors: X
authors: Wang
authors: Xin
authors: X
authors: Liu
authors: Dewei
authors: D
authors: Zhu
authors: Mark T
authors: MT
authors: Swihart