文献类型：期刊文献

英文题名：Synthesis of nanocrystals via microreaction with temperature gradient:: towards separation of nucleation and growth

作者：Yang, Hongwei[2];Luan, Weiling[2];Tu, Shan-tung[2];Wang, Zhiming M.[1]

机构：[1]Univ Arkansas, Mat Res Sci & Engn Ctr, Fayetteville, AR 72701 USA;[2]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2008

卷号：8

期号：3

起止页码：451

外文期刊名：LAB ON A CHIP

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000254424300013)】；

语种：英文

摘要：By utilizing the symmetrical temperature distribution in a tube furnace chamber, a capillary microreactor was designed with the microchannel passing two well-controlled, stable temperatures in steep temperature gradients. The two-temperature microreator, first developed and implemented by this research team, provides an opportunity to separate the nucleation and growth of semiconductor nanocrystals, leading to better control of nucleation and growth kinetics. For the synthesis of CdSe nanocrystals as a model system, we demonstrated the improved size uniformity achieved by the two-temperature approach, confirming the success of the use of high temperature to burst nucleation and low temperature to promote growth.