Liu Zhaoping, Xu Dan, Liang Jianbo, Shen Jianming, Zhang Shuyuan, Qian Yitai
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Phys Chem B. 2005 Jun 2;109(21):10699-704. doi: 10.1021/jp050332w.
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 degrees 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.
我们展示了一种简便的溶液相方法，通过在160℃下于十二硫醇和油酸的混合表面活性剂溶剂中热分解CuS₂CNEt₂来合成六方相Cu₂S的单晶、高纵横比和超薄纳米线。Cu₂S纳米线可以可控地合成，直径薄至1.7nm，长度可达数十微米；它们通常以厚度为数百纳米的束状形式排列。基于实验结果，合理地提出了超薄纳米线的形成机制。还详细研究了一些对产物尺寸和形状有显著影响的关键合成参数。紫外可见光谱测量表明，所得的超薄纳米线表现出强烈的量子尺寸效应。
