发布时间：2025-04-30

论文名称：Role of Salt in the Spontaneous Assembly of Charged Gold Nanoparticles in Ethanol

发表刊物：Langmuir

摘要：This paper investigates the role of salt in the spontaneous linear assembly of charged gold nanoparticles in ethanol and attempts to clear up a misunderstanding on the role of ethanol in this process. Many prior reports have noted that the addition of ethanol to an aqueous solution of gold nanoparticles causes their aggregation into linear assemblies. It was therefore believed that ethanol plays the determining role during the assembly process. In this work, we carried out systematic studies which indicate that residual salt in conjunction with ethanol, instead of ethanol itself, induces the assembly of gold nanoparticles in ethanol. In the absence of salt, gold nanoparticles can be well dispersed in an ethanol solution. Furthermore, we find that the chainlike assemblies can disassemble upon dilution of the salt or the evaporation of ethanol if the gold nanoparticles are protected with a sufficiently strong ligand.

合写作者：Xiaogang Han, James Goebl, Zhenda Lu, Yadong Yin*

卷号：27

页面范围：5282-5289

是否译文：否

发表时间：2011-04-05