Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004, P. R. China.
Nanoscale. 2012 Apr 21;4(8):2741-7. doi: 10.1039/c2nr00057a. Epub 2012 Mar 8.
In this report, Cu(2-x)Se nanoplates with columnar superstructures have been synthesized via a facile, "green", phosphine-free, low-cost colloidal method. An inorganic tin(iv) selenium complex (Sn(2)Se(6))(4-) was attached on the surfaces of Cu(2-x)Se nanoplates directly during the synthesis of Cu(2-x)Se nanoplates. With the assistance of (Sn(2)Se(6))(4-) complexes, Cu(2-x)Se nanoplates showed "strong" self-assembly behavior and the stability of Cu(2-x)Se nanoplate superstructures was increased. Such columnar superstructures were still kept even if most of the coordinating organic ligands were removed by washing. The mechanism of the formation of "strong" columnar Cu(2-x)Se superstructures had been studied. We found the "strong" self-assemblies of Cu(2-x)Se nanoplates were formed only with the coexistence of oleylamine (OAM) and Sn-X in the synthesis process. The inorganic ligand not only played a key role in the construction of the "strong" columnar Cu(2-x)Se superstructure but also greatly improved their superior electrical property.
在本报告中，通过一种简便、“绿色”、无膦、低成本的胶体方法合成了具有柱状超结构的 Cu(2-x)Se 纳米板。在 Cu(2-x)Se 纳米板的合成过程中，直接将无机锡(iv)硒配合物(Sn(2)Se(6))(4-)附着在 Cu(2-x)Se 纳米板的表面上。在(Sn(2)Se(6))(4-)配合物的辅助下，Cu(2-x)Se 纳米板表现出“强”自组装行为，并且增加了 Cu(2-x)Se 纳米板超结构的稳定性。即使通过洗涤除去大部分配位有机配体，这种柱状超结构仍然保持。研究了形成“强”柱状 Cu(2-x)Se 超结构的机制。我们发现，只有在合成过程中同时存在油胺(OAM)和 Sn-X，Cu(2-x)Se 纳米板才能形成“强”自组装。无机配体不仅在构建“强”柱状 Cu(2-x)Se 超结构中起着关键作用，而且极大地提高了它们的优异电性能。
