银纳米颗粒的等离子体手术反应与手术超分子组合相互作用
Ben M Maoz1, Rob van der Weegen, Zhiyuan Fan
1Department of Chemical Physics, School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
Journal of the American Chemical Society
|October 9, 2012
概括
状超分子结构诱导银纳米颗粒中的圆形二元化 (CD). 这种等离子CD效应取决于纳米粒子大小和分子堆叠,揭示了不同的合机制.
科学领域:
- 超分子化学 超分子化学
- 纳米技术 纳米技术
- 塑制剂的使用方法
背景情况:
- 状分子通常单独表现出弱圆二元化 (CD).
- 性分子的超分子组合可以放大CD信号.
- 银纳米粒子表现出表面等离子体共振,这是一种对其环境敏感的特性.
研究的目的:
- 通过性超分子结构来研究银纳米颗粒中等离子体CD的诱导.
- 探索分子堆叠,纳米粒子大小和由此产生的手术反应之间的关系.
- 为了阐明背后的机制 合性堆-等离子体合.
主要方法:
- 在含有性超分子组件的水溶液中制备银纳米颗粒.
- 分子结构和纳米粒子-分子系统的循环二元化 (CD) 的表征.
- 取决于温度的CD测量,以研究奇拉结构的稳定性及其对等离子CD的影响.
- 模型计算以了解纳米粒子形状对手术效应的贡献.
主要成果:
- 在溶液中堆叠的基拉尔分子产生了显著的CD信号,这些信号取决于温度.
- 银纳米粒子在它们的表面等离子体共振波段表现出诱导的等离子体CD.
- 基于纳米粒子大小和分子组合,观察到两种不同的等离子CD诱导机制.
- 具有大型分子堆的小型纳米粒子显示了温度依赖的等离子CD,表明了电磁合.
- 具有分子单层的大型纳米粒子显示温度独立的等离子CD,可能是由于纳米粒子形状扭曲.
结论:
- 状超分子结构可以有效地诱导银纳米颗粒中的等离子CD.
- 性诱导的机制取决于纳米粒子和分子组件的相对大小.
- 等离子CD可以由电磁合或微妙的形扭曲在纳米粒子形状产生的.
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