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Cyanide-free preparation of gold nanowires: controlled crystallinity, crystallographic orientation and enhanced field emission

Author:
Lyu, Shuangbao, Lei, Dang Yuan, Liu, Wenqiang, Yao, Huijun, Mo, Dan, Chen, Yonghui, Hu, Peipei, Sun, Youmei, Liu, Jie, Duan, Jing Lai
Source:
RSC advances 2015 v.5 no.41 pp. 32103-32109
ISSN:
2046-2069
Subject:
crystal structure, electric potential difference, electrochemistry, gold, nanogold, nanopores, nanowires, temperature
Abstract:
The environmentally friendly preparation of nanomaterials with controlled structural features represents a development trend of nanoscience and nanotechnology. In this work, using a cyanide-free bath, gold nanowires with controlled crystallinity and preferred crystallographic orientation have been prepared by electrochemical deposition in home-made polycarbonate ion track-etched templates. Single-crystal and polycrystal gold nanowires with preferred orientations along the [111] and [100] directions have been obtained by selecting fabrication parameters. The influence mechanisms of nanopore diameter, applied voltage, and deposition temperature on structural properties are proposed. In addition, single-crystal nanowires with [100] preferred orientation show enhanced field emission, which may be attributed to their single-crystal structure and the lower work function of loosely packed crystal planes.
Agid:
6673312