单齿络合剂辅助水热合成CdS纳米棒

以单齿络合剂甲胺为辅助通过水热法制备了CdS纳米棒,所得CdS纳米棒分别用TEM、XRD、Raman和PL等技术进行了表征.研究了络合剂甲胺的浓度对CdS纳米晶体形貌的影响.实验发现当络合剂甲胺的浓度为1、5和20wt％时,水热合成CdS纳米晶体的形貌分别为纳米颗粒、短纳米棒和长纳米棒.这也表明络合剂的类型即单齿或双齿络合剂并不是水热合成CdS纳米棒形成的关键因素.基于实验结果,提出了一个可能的水热合成CdS纳米棒的形成机制:络合物结构—控制机理.

Monodentate Ligand-assisted Hydrothermal Synthesis of CdS Nanorods

Semiconductor CdS nanorods were successfully synthesized by the hydrothermal method with .monodentate ligand methylamine as assistant. The obtained CdS nanorods were characterized by using TEM, XRD, Raman, and PL techniques respectively. Effects of the concentration of methylamine on the morphologies of CdS nanocrystals were investigated. It was found that CdS nanocrystals synthesized displayed nano-particle, short nanorod, and long nanorod shape when the concentration of methylamine was 1, 5, and 20wt% in the hydrothermal process, respectively. This indicated that the type of ligand, i.e. bidentate or monodentate ligand, was not the critical factor for the formation of one dimention CdS nanocrystals in the hydrothermal process. Based on the experimental results, a complex structure-controlling mechanism was proposed.