Ionic liquid-assisted synthesis of CdSe dendrites from nanospheres through oriented attachment
作者:Xiaochuan Duan、Xiaodi Liu、Qing Chen、Haobo Li、Jie Li、Xia Hu、Yingying Li、Jianmin Ma、Wenjun Zheng
DOI:10.1039/c0dt01212b
日期:——
CdSe nanospheres and dendrites have been successfully synthesized via an ionic liquid-assisted hydrothermal synthetic method. The samples are characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Our experimental results demonstrate that the CdSe dendrites are obtained by self-assembly from nanospheres under the driving force of oriented attachment process. Moreover, we found that the sizes and morphologies of the crystals depended on the concentration of the ionic liquid, and we obtained the CdSe nanospheres with low concentration of [BMIm][SeO2(OCH3)] and CdSe dendrites with high concentration of [BMIm][SeO2(OCH3)]. The effects of [BMIm][SeO2(OCH3)] on the formation of the CdSe have been investigated systematically. This method is expected to be a useful technique to prepare other metal selenides for controlling the diverse shapes and sizes.
通过离子液体辅助水热合成法成功合成了碲化镉(CdSe)纳米球和树枝状物。样品通过 X 射线衍射 (XRD)、能量色散 X 射线光谱 (EDS)、透射电子显微镜 (TEM) 和高分辨率透射电子显微镜 (HRTEM) 进行了表征。实验结果表明,在定向附着过程的驱动下,碲化镉枝晶是由纳米球自组装而成的。此外,我们还发现晶体的大小和形态取决于离子液体的浓度,低浓度的[BMIm][SeO2(OCH3)]可以得到碲化镉纳米球,高浓度的[BMIm][SeO2(OCH3)]可以得到碲化镉枝晶。系统研究了 [BMIm][SeO2(OCH3)]对 CdSe 形成的影响。该方法有望成为制备其他金属硒化物的有用技术,以控制不同的形状和尺寸。