纳米粒子结构复杂性的出现及其组装
Chenjie Zeng1, Yuxiang Chen1, Kristin Kirschbaum2
1Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
Science (New York, N.Y.)
|December 24, 2016
概括
金纳米粒子自组实现了生物分子复杂性和精度. 纳米粒子表面的连接体模式决定了晶体的形成,显示出新兴的层次结构.
科学领域:
- 材料科学
- 纳米技术
- 晶体学
背景情况:
- 生物分子具有显著的自我组装能力,形成复杂的层次结构.
- 控制纳米粒子组合对于先进的材料设计至关重要.
研究的目的:
- 证明纳米粒子自组可以在层次结构,复杂性和精度上与生物分子竞争.
- 阐明控制多尺度纳米粒子组装的驱动力和规则.
主要方法:
- 采用X射线衍射研究来确定金纳米颗粒的精确原子,分子和纳米级组装结构.
- 进行了表面连接物组织和纳米粒子包装的分析.
主要成果:
- 黄金纳米粒子 (246个黄金核心原子与80个p-甲基乙烯酸表面连接体) 自组装具有高保真度.
- 通过C-H⋅⋅π相互作用在纳米粒子表面组织成旋转和并行模式.
- 表面模式对称性和密度定向的纳米粒子包装成有序的晶体,具有方向性,旋转性和转移性顺序.
结论:
- 纳米粒子自我组装可以实现生物分子层次的层次组织.
- 层次相互作用和对称性匹配是从简单的构建块驱动复杂结构形成的关键现象.
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