Two-phase synthesis of shape-controlled colloidal zirconia nanocrystals and their characterization.
Two-phase synthesis of shape-controlled colloidal zirconia nanocrystals and their characterization.
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DOI：
10.1021/ja0612145
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发表时间：
2006-07
影响因子：
15
通讯作者：
N. Zhao;Daocheng Pan;W. Nie;Xiangling Ji
中科院分区：
文献类型：
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作者：
N. Zhao;Daocheng Pan;W. Nie;Xiangling Ji
我们已经开发了一种两相法合成的形状控制的胶体氧化锆纳米晶体，包括球形，泪滴状，棒状和米粒形的颗粒。我们发现，控制形状的关键因素是反应时间，封端剂的性质，和单体浓度。利用透射电子显微镜（TEM）、高分辨透射电子显微镜（TEM）、X射线粉末衍射仪、紫外-可见吸收光谱仪和荧光光谱仪对所制备的ZrO 2纳米粒子的形貌、结晶度、光学性质和结构特征进行了分析。讨论了可能的成核和生长过程。
We have developed a two-phase approach for the synthesis of shape-controlled colloidal zirconia nanocrystals, including spherical-, teardrop-, rod-, and rice grain-shaped particles. We found that the key factors for controlling the shape were the reaction time, the nature of the capping agent, and the monomer concentration. We have analyzed the morphologies, crystallinity, optical properties, and structural features of the as-prepared ZrO2 nanoparticles by using transmission electron microscopy (TEM), high-resolution TEM, X-ray powder diffraction, and UV-vis absorption and fluorescence spectroscopy. The possible nucleation and growth process is also discussed.