Synthesis of NaYF4 nanocrystals with predictable phase and shape
Synthesis of NaYF4 nanocrystals with predictable phase and shape
复制标题
DOI：
10.1002/adfm.200600807
复制
发表时间：
2007-10-15
影响因子：
19
通讯作者：
Li, Yadong
中科院分区：
文献类型：
--
作者：
Liang, Xin;Wang, Xun;Li, Yadong
在这篇论文中，开发了一种水/醇/油酸体系来制备具有可预测的尺寸，形状和相的NaYF 4纳米晶体。研究了影响NaYF 4纳米晶相和形貌演化的结构和动力学因素，系统地考察和讨论了NaF/y（3+）比、反应时间和反应温度对NaYF 4纳米晶相和形貌演化的影响。结果表明，NaF与Y（3+）的比例是影响NaYF 4纳米晶形貌的主要因素，而温度和反应时间是影响NaYF 4纳米晶相结构的关键因素。该研究对于无机纳米晶体的精确控制生长，特别是对于那些通常以不同晶体结构结晶的纳米晶体的精确控制生长具有重要意义。
In this Full Paper, a water/alcohol/oleic acid system was developed to prepare NaYF4 nanocrystals with predictable size, shape and phase. The structural and kinetic factors that govern the phase and shape evolution of NaYF4 nanocrystals have been carefully studied, and the influence of NaF to y(3+) ratio, reaction time and temperature on the phase and shape evolution of the as-prepared NaYF4 samples was systematically investigated and discussed. It was found that the NaF to y(3+) ratio was responsible for the shape evolution while temperature and reaction time was the key for the phase control of the NaYF4 nanocrystals. This study would be suggestive for the precisely controlled growth of inorganic nanocrystals, especially for those usually crystallizing in diverse crystal structures.