胶体纳米粒子诱导的通用溶剂重构
Universal solvent restructuring induced by colloidal nanoparticles
摘要：
胶体纳米颗粒用于从催化和能源应用到化妆品的应用，通常嵌入基质中或分散在溶液中。因此，整个颗粒表面，即预期发生反应的地方，被暴露。在这里，我们用x射线对分布函数分析表明，极性和非极性溶剂普遍重组周围的纳米粒子。层的增强顺序存在的厚度的影响，分子的大小和高达2纳米的纳米粒子表面以外。这些结果表明，溶剂化的纳米颗粒的增强的反应性包括来自颗粒本身尺寸的溶剂化壳的贡献。
英文摘要：
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 non-polar 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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