Nanoseparation-lnspired Manipulation of the Synthesis of CdS Nanorods

作     者：Xiaoming Sun Xiuju Ma Lu Bai Junfeng Liu Zheng Chang David G. Evans Xue Duan Jiaou Wang Joseph F. Chiang 

作者机构：State Key Laboratory of Chemical Resource Engineering RO. Box 98 Beijing University of Chemical Technology Beijing 100029 China Institute of High Energy Physics Beijing 100039 China Department of Chemistry and Biochemistry SUNY-Oneonta Oneonta NY 13820 USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2011年第4卷第2期

页      面：226-232页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China, NSFC Program for New Century Excellent Talents in University, NCET 

主　　题：CdS纳米棒 合成条件 操纵 长度分布 光致发光特性 生长行为 分离方法 密度梯度 

摘      要：CdS nanorods have been sorted by length using a density gradient ultracentrifuge rate separation method. The fractions containing longer rods showed relatively stronger oxygen-related surface trap emission, while the shorter ones had dominant band-edge emission. These results suggest that the final length distribution of CdS nanorods is not a result of random nucleation and growth, but is related to the local synthesis conditions. Inspired by these findings, different synthesis environments (N2, air, and O2) have been employed in order to tailor the length distribution. In addition to the rod length, the photoluminescence properties of CdS nanorods can also be manipulated. Increasing the oxygen partial pressure significantly changed the growth behavior of CdS nanorods by improving the anisotropic growth.