One-pot synthesis and self-assembly of colloidal copper(I) sulfide nanocrystals
One-pot synthesis and self-assembly of colloidal copper(I) sulfide nanocrystals
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胶体硫化铜纳米晶的一锅法合成及自组装
DOI：
10.1088/0957-4484/21/28/285602
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发表时间：
2010-07-16
期刊：
影响因子：
3.5
通讯作者：
Wang, Zhanguo
中科院分区：
文献类型：
--
作者：
Tang, Aiwei;Qu, Shengchun;Wang, Zhanguo
以乙酰丙酮铜、十二烷基硫醇和油胺的混合溶液为原料，采用一锅法制备了尺寸和形状可控的硫化铜（Cu2S）纳米晶.采用X射线粉末衍射（PXRD）、X射线光电子能谱（XPS）、俄歇电子能谱（AES）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）对产物的晶体结构、化学组成和形貌进行了表征。通过调节反应参数可以很容易地控制Cu2S纳米晶的形貌和尺寸。随着反应温度的升高，Cu2S纳米晶由球形向盘状转变。球形Cu2S纳米晶具有高度的自组装成紧密堆积的超晶格结构的倾向。随着反应时间的延长，Cu2S纳米盘的形状由圆柱形变为六棱柱形，直径和厚度也随之增加。更有趣的是，纳米盘倾向于自组装成具有不同长度和方向的面对面堆叠链。这种一锅法可以扩展到具有不同形状和尺寸的其他金属硫化物纳米晶体的合成。
A simple one-pot method is developed to prepare size- and shape-controlled copper(I) sulfide (Cu2S) nanocrystals by thermolysis of a mixed solution of copper acetylacetonate, dodecanethiol and oleylamine at a relatively high temperature. The crystal structure, chemical composition and morphology of the as-obtained products are characterized by powder x-ray diffraction (PXRD), x-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The morphology and size of the Cu2S nanocrystals can be easily controlled by adjusting the reaction parameters. The Cu2S nanocrystals evolve from spherical to disk-like with increasing reaction temperature. The spherical Cu2S nanocrystals have a high tendency to self-assemble into close-packed superlattice structures. The shape of the Cu2S nanodisks changes from cylinder to hexagonal prism with prolonged reaction time, accompanied by the diameter and thickness increasing. More interestingly, the nanodisks are inclined to self-assemble into face-to-face stacking chains with different lengths and orientations. This one-pot approach may extend to synthesis of other metal sulfide nanocrystals with different shapes and sizes.