采用一种新的合成技术,在复合氢氧化物熔融体中,以CuCl2·2H2和Se粉为原料在200℃下合成了Cu2Se纳米晶体,X射线衍射谱表明合成的Cu2Se纳米晶体属立方晶系结构,格点对称群为Fm3m(225),格点参数a=0.5765nm.扫描电子显微镜(SEM)和透射电子显微镜(TEM)图表明Cu2Se纳米晶体为厚度为10～20nm,宽度为200～300nm的片状结构.生长时加入少量的水会导致棒状非晶产生,水量越多棒状非晶的尺寸越大,使得Cu2Se晶体的均匀性和品质变差.根据配位多面体生长机理模型,计算了生长基元的稳定能,并探讨了在复合氢氧化物熔融中纳米Cu2Se晶体的形成机理.
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