★ ★ 小木虫(金币+0.5):给个红包，谢谢回帖 lchpy(金币+1): thanks for your information 2011-10-21 16:03:29
Possibly because both SH group and NH2 group of cystamine can bind to gold surface, which then lead to the aggregation of nanoparticles. Try to control the pH, or adjust the amount of cysteamine.
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