应用软模板法成功制备了半导体硫化铅树枝状纳米结构.此反应是在非离子表面活性剂Triton X-100存在下进行的,具有条件温和,操作简单等优点.对反应过程中硫化铅各向异性生长的影响因素进行系统的阐述,通过简单地控制反应时间及表面活性剂的加入量就可得到纳米棒、纳米分枝结构以及立方结构.考虑到形貌对半导体性能有重要影响,这一实验结果的取得应具有很高的实际应用价值.
PbS dendritic nanostructures have been successfully synthesized by a facile method from solutions containing a nonionic surfactant, Triton X-100 ( t-octyl-( OCH2CH2 ) xOH ,x = 9,10) under the ambient pressure. The anisotropic structural evolution of semiconductor PbS nanocrystals and the systematically elucidated key growth parameters for their shape control were studied. Through simply programming growth parameters such as aging time and capping molecules in the initial scheme, desired architecture of building blocks including nanorods, nanodendrities and nanocubes can be consistently obtained. Considering that the size and morphology of such semiconductors very strongly affect their applications, there will be significant advances that can be applied to the nanoscale devices.
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