Jasieniak Jacek, Bullen Craig, van Embden Joel, Mulvaney Paul
J Phys Chem B. 2005 Nov 10;109(44):20665-8. doi: 10.1021/jp054289o.
High quality CdSe nanocrystals have been prepared using elemental selenium as the chalcogenide precursor dispersed in 1-octadecene (ODE). The conditions used to prepare the Se precursor were found to be critical for successful nanocrystal synthesis. Systematic titration of the Se precursor solution with tri-n-octylphosphine (TOP) allowed the Se reactivity to be tuned and the final particle size to be controlled. Band-edge and surface related emission were observed for samples prepared in the presence and absence of added TOP. In the absence of a selenium passivant, the crystal structure of CdSe nanocrystals could be altered from zinc blende to wurtzite by the addition of bis(2,2,4-trimethylpentyl)phosphinic acid (TMPPA).
已使用元素硒作为分散在1-十八烯（ODE）中的硫族化物前驱体制备出高质量的CdSe纳米晶体。发现用于制备硒前驱体的条件对于成功合成纳米晶体至关重要。用三正辛基膦（TOP）对硒前驱体溶液进行系统滴定，可以调节硒的反应活性并控制最终的粒径。对于在添加和不添加TOP的情况下制备的样品，均观察到了带边发射和表面相关发射。在没有硒钝化剂的情况下，通过添加双（2,2,4-三甲基戊基）次膦酸（TMPPA），CdSe纳米晶体的晶体结构可以从闪锌矿转变为纤锌矿。
