University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, Carl-von-Ossietzky-Str. 9-11, 26129 Oldenburg, Germany.
J Am Chem Soc. 2010 Nov 17;132(45):15976-86. doi: 10.1021/ja103828f. Epub 2010 Oct 19.
Cu(2)S-CuInS(2) hybrid nanostructures as well as pure CuInS(2) (CIS) nanocrystals were synthesized by methods of colloidal chemistry. The structure, the shape and the composition of these nanomaterials were investigated with transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX). By changing the reaction conditions, CuInS(2) nanorods with different aspect ratio, dimeric nanorods as well as hexagonal discs and P-shaped particles could be synthesized. Under our reaction conditions, CIS nanoparticles crystallize in the hexagonal wurtzite structure, as confirmed by Rietveld analysis of the X-ray diffraction patterns. The formation of Cu(2)S-CuInS(2) hybrid nanostructures turned out to be an essential intermediate step in the growth of CIS nanoparticles, the copper sulphide part of the hybrid material playing an important role in the shape control of the CIS nanocrystals. By a treatment of Cu(2)S-CuInS(2) with 1,10-phenanthroline, Cu(2)S parts of the hybrid nanostructures could be removed, and pure CIS nanoparticles with shapes not accessible with other methods can be obtained. Our synthetic procedure turned out to be suitable to synthesize also other compounds, like CuInS(2)-ZnS alloys, and to modify, in this way, the optical properties of the nanocrystals.
Cu(2)S-CuInS(2) 杂化纳米结构以及纯 CuInS(2) (CIS) 纳米晶体通过胶体化学方法合成。这些纳米材料的结构、形状和组成通过透射电子显微镜 (TEM)、粉末 X 射线衍射 (XRD) 和能谱分析 (EDX) 进行了研究。通过改变反应条件，可以合成不同纵横比的 CuInS(2) 纳米棒、二聚体纳米棒以及六方盘和 P 形颗粒。在我们的反应条件下，CIS 纳米颗粒通过 X 射线衍射图谱的 Rietveld 分析确认为六方纤锌矿结构。Cu(2)S-CuInS(2) 杂化纳米结构的形成是 CIS 纳米颗粒生长的一个重要中间步骤，杂化材料中的硫化铜部分在 CIS 纳米晶体的形状控制中起着重要作用。通过用 1,10-菲啰啉处理 Cu(2)S-CuInS(2)，可以去除杂化纳米结构中的 Cu(2)S 部分，并获得用其他方法无法获得的具有特定形状的纯 CIS 纳米晶体。我们的合成方法也适用于合成其他化合物，如 CuInS(2)-ZnS 合金，并以这种方式修饰纳米晶体的光学性质。
