writer：Zhaoping Liu, Dan Xu, Jianbo Liang, Jianming Shen, Shuyuan Zhang, Yitai Qian*
keywords：solution-phase, Cu2S, UV-vis
source：期刊
specific source：J. Phys. Chem. B 2005, 109, 10699-10704.
Issue time：2005年

We demonstrate a facile solution-phase method for the synthesis of single-crystal, high aspect ratio, and ultrathin nanowires of hexagonal-phase Cu2S by thermal decomposition of CuS2CNEt2 in a mixed surfactant solvent of dodecanethiol and oleic acid at 160 °C. Cu2S nanowires can be controllably synthesized with a
diameter as thin as 1.7 nm and length up to tens of micrometers; they are usually aligned in the form of bundles with a thickness of hundreds of nanometers. Based on the experimental results, the formation mechanism of the ultrathin nanowires has been properly proposed. Some key synthetic parameters, which have a significant effect on the sizes and shapes of the products, have also been investigated in detail. UV-vis spectroscopy measurement reveals that the resultant ultrathin nanowires show a strong quantum size effect.