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ygb7086(金币+25, 翻译EPI+1): 2010-04-02 10:48
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Based on the experimental phenomena, we believe that the formation mechanism of the process may be divided into two steps: nucleation and crystal growth. In the nucleation process, small particles aggregate to form larger particles. Then in the growth process, small particles through the SSS mechanism may grow along two directions.When the reaction system by adding surfactant (PVP﹑TX-100﹑PEG600), the crystal growth rate may be different. When the growth rate is too low, the middle part may be formed together into a rod . Once the addition of surfactant,the entire system is almost the same growth rate, coupled with Sb-S atomic chain because of the opposite sex, in different solvents can be synthesized in the same size of uniform nanorods or nanofibers. So were a whole looks like a bowknot﹑a bundle of straw bow ﹑flower﹑ sheet﹑hollow spere. The more precise formation mechanism needs further study. |
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