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在溶剂分子暴露时高架构纳米晶体超级网格的动态转换

Yasutaka Nagaoka¹, Jeremy Schneider¹, Na Jin¹

¹Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States.

Journal of the American Chemical Society

|May 1, 2024

概括

基于集群的体中心立方超 (cBCC SLs) 在分子暴露时转化为面中心立方SLs. 在这些复杂的纳米晶体组合中, 连接体配置决定了这种动态转换和独特的软机械特性.

科学领域:

材料科学
纳米技术
晶体学

背景情况:

基于集群的体中心立方超 (cBCC SL) 是复杂的纳米晶体组件.
由于独特的能量景观,之前的工作在cBCC SL中建立了可控的秩序.
cBCC SL 的结构可变性和机械性能仍未得到研究.

研究的目的:

调查cBCCSL的结构转换性.
探索cBCCSL的机械性能.
了解联体配置在纳米晶体超级晶格行为中的作用.

主要方法:

在现场基于同步子的小角度X射线散射 (SAXS) 来监测动态转换.
组装后分子暴露以诱导结构变化.
关于配体-纳米晶体相互作用的机制研究.

主要成果:

在分子暴露时,CBCC SL 动态转化为面中心立方体 (FCC) SL.
转化过程涉及多个步骤,由分子-连接体相互作用驱动.
精确的连接物配置对于高结构可变性和柔软的状机械性质至关重要.

结论:

连接物分子配置显著影响纳米晶体超级格子的特性.
由联体控制的弱范德瓦尔斯相互作用使得超结构性转化成为可能.
这些发现为新型软材料,纳米机器人和失衡组件提供了途径.

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