Phase-Selective Synthesis and Self-Assembly of Monodisperse Copper Sulfide Nanocrystals

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• 作者：Hui Zhang ; Yiqiang Zhang ; Jingxue Yu ; Deren Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：September 4, 2008
• 年：2008
• 卷：112
• 期：35
• 页码：13390-13394
• 全文大小：300K
• 年卷期：v.112,no.35(September 4, 2008)
• ISSN：1932-7455

文摘

Single-crystalline, monodisperse copper sulfide nanocrystals with controlled sizes, shapes, and phases were successfully synthesized via a simple, low-cost, and environmentally friendly chemical reaction of CuCl₂ and S in oleylamine at 100−180 °C. It was found that the molar ratios of [CuCl₂]:[S] played the critical role for the control of the sizes, shapes, and phases of copper sulfide nanocrystals. The hexagonal CuS nanodisks, hexagonal CuS nanoribbons consisting of face-to-face stacked nanodisks, and monoclinic Cu_1.75S nanoribbons consisting of face-to-face stacked nanodisks were obtained when the molar ratios of [CuCl₂]:[S] were 1:1, 2:3, and 2:1, respectively. It was believed that the van der Waals force and dipole−dipole interaction were responsible for the self-assembly of copper sulfide nanodisks. Finally, the copper sulfide nanocrystals were characterized by transmission electron microscopy, high-resolution transmission electron micrscopy, X-ray diffraction, and Fourier transform infrared, and its growth mechanism was primarily discussed.