Wang Xianliang, Liu Xin, Zhu Dewei, Swihart Mark T
Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, New York 14260-4200, USA.
Nanoscale. 2014 Aug 7;6(15):8852-7. doi: 10.1039/c4nr02114b.
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).
通过阳离子交换，将自掺杂的Cu2-xS纳米晶体（NCs）转化为组成可调的单分散Cu2-xS-Au2S NCs，包括纯Au2S。随着金含量的增加，近红外（NIR）局域表面等离子体共振（LSPR）受到抑制并发生红移。阳离子交换伴随着阳离子空位的消除和晶体结构的变化。在透射电子显微镜（TEM）中进行电子辐照时，部分交换的Cu2-xS-Au2S核壳结构演变成哑铃状结构。
