Composite formation of Thiol-capped Au nanoparticles and mesoporous silica prepared by a sol-gel method
Composite formation of Thiol-capped Au nanoparticles and mesoporous silica prepared by a sol-gel method
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DOI：
10.1007/s10853-006-1396-6
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发表时间：
2007-01
影响因子：
4.5
通讯作者：
Y. Tai;M. Watanabe;J. Murakami;K. Tajiri
中科院分区：
文献类型：
--
作者：
Y. Tai;M. Watanabe;J. Murakami;K. Tajiri
我们以前曾报道过十二硫醇封端的Au纳米粒子（平均直径2.6 nm）和二氧化硅气凝胶的纳米复合材料的制造。结果表明，在有机溶剂中，Au颗粒被有效地吸附在硅胶湿凝胶上。在本文中，二氧化硅表面的表面分析和各种溶剂的吸附率的评价，进行阐明的性质之间的相互作用的封端的纳米粒子和硅胶，进行说明。这些观察结果表明，偶极诱导偶极之间的相互作用的OH基团的二氧化硅表面和纳米粒子的金属核可能是重要的吸附。结果表明，通过改变溶剂极性，可以控制纳米粒子在凝胶内的空间分布。
We have previously reported the fabrication of a nanocomposite from dodecanethiol-capped Au nanoparticles (average diameter 2.6 nm) and a silica aerogel. It was found that the Au particles were efficiently adsorbed on a silica wet-gel in organic solvents. In this paper, surface analysis of the silica surface and evaluation of adsorption rates for various solvents, performed to elucidate the nature of the interaction between the capped nanoparticles and the silica gel, are described. These observations indicate that dipole-induced dipole interaction between OH groups on the silica surface and metal cores of the nanoparticles is probably important for the adsorption. It was demonstrated that, by changing the solvent polarity, spatial distribution of the nanoparticles inside the gel can be controlled.