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| 众所周知，表面活性剂影响晶体的生长行为，不同的表面活性剂因其具有不同的物理和化学性质影响了反应物的溶解性，反应活性，分散性，特别是表面活性剂的极性和配位能力对产品的形貌有重要的影响。特别是近年来PVP作为稳定剂和结构导向剂已成功的制备了铅和银的纳米线，纳米棒和其它新颖的纳米结构。在我们的实验中PVP可能作为帽形剂通过选择性吸附和解吸作用来控制不同晶面的生长速率，从而促进晶体的定向生长，并阻止粒子的团聚、稳定初始粒子。 |
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wendyyang11
金虫 (正式写手)
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ZHL0627(金币+20, 翻译EPI+1): 2010-04-02 09:34
| As everyone knows, surfactants affect crystal growth behavior，different surfactants because of their different physical and chemical properties affect the solubility of reactants, reaction activity, dispersion, in particular the polar of surfactants and coordination ability has an important implications to the morphology. In recent years,PVP as a stabilizer and structure directing agent has been successfully prepared lead and silver nanowires, nanorods, and other novel nanostructures. In our experiment, PVP may be used as cap-like agent by selective adsorption and desorption to control the growth rate of different crystal faces, thus promoting the growth of the crystal orientation and to prevent particle aggregation, stabilize the initial particles. |
2楼2010-04-01 23:55:26
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sirljz(金币+3):谢谢交流，欢迎新虫，就是来晚了啊 2010-04-04 12:13
sirljz(金币+3):谢谢交流，欢迎新虫，就是来晚了啊 2010-04-04 12:13
| It is well known that the presence of surfactants can influence the crystal growth, and different surfactants with different physical and chemical properties can influence the solubility, reactivity, and diffusion behavior of the reactants, in particular, the polarity and coordinating ability of the surfactants can influence the crystal morphology of the final product. Particularly, it is well known that the polymer PVP has been successfully employed in recent years as a stabilizing agent as well as structure-directing agent for the preparation of lead and silver nanostructures, including nanowires, nanorods and other novel nanostructures. In our experiments, the possible function of PVP and other surfactants, added as a polymer capping reagent, is to control the growth rates of different crystalline faces by interacting with these faces through absorption and desorption. |
3楼2010-04-04 09:05:45