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[资源] Science重大发现：胶体纳米颗粒诱导的不寻常溶剂重组

德国Friedrich-Alexander University Erlangen-Nürnberg的Mirijam Zobel教授在最新一期science上发表了一篇名为“Universal solvent restructuring induced by colloidal nanoparticles”的文章。
胶体纳米颗粒，有着广泛的应用，从催化和能源相关的应用到化妆品，通常镶嵌在基质中或者分散在溶液中。整个的颗粒表面，被认为是反应所发生的地方，因此是暴露的。在这篇文章中，作者通过x射线对分布函数分析，发现极化和非极化的溶剂通常会围绕纳米颗粒发生重构。
Colloidal nanoparticles, used for applications from catalysis and energy applications to cosmetics, are typically embedded in matrixes or dispersed in solutions. The entire particle surface, which is where reactions are expected to occur, is thus exposed. Here, we show with x-ray pair distribution function analysis that polar and nonpolar solvents universally restructure around nanoparticles. Layers of enhanced order exist with a thickness influenced by the molecule size and up to 2 nanometers beyond the nanoparticle surface. These results show that the enhanced reactivity of solvated nanoparticles includes a contribution from a solvation shell of the size of the particle itself.

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附件 1 : Nano-2015-Science-2015-Zobel-292-4-Universal_solvent_restructuring_induced_by_colloidal_nanoparticles.pdf

2015-01-16 09:33:32, 710.92 K