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gllym0216

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[求助] 求各路纳米高手解释纳米粒径与PVP之间的关系

我做的实验结果是,金属纳米颗粒的粒径随着PVP浓度的增大而减小,怎么给出合理的解释。请各位高手给予指点,不甚感激。
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xbg2080

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【答案】应助回帖

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yingli09(金币+2): 2011-11-16 09:35:37
gllym0216(金币+2): 2012-01-04 10:15:43
PVP should be surfactant which can anchor onto the surface of nanoparticles by the coordination of N atom and metal in your system.

Much more surfanct you add, much more surfactant molecules on the surface of nanoparticles. That means it will increase the repulsion force by steric hindrance effect and decrease the probability of agglomeration. Overall, more addition of PVP leads to the narrow PSD.
6楼2011-11-16 09:33:36
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