Emergence of complexity inhierarchically organized chiral particles
Emergence of complexity inhierarchically organized chiral particles
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DOI：
10.1126/science.aaz7949
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发表时间：
2020-05-08
期刊：
影响因子：
56.9
通讯作者：
Kotov, Nicholas A.
中科院分区：
文献类型：
--
作者：
Jiang, Wenfeng;Qu, Zhi-bei;Kotov, Nicholas A.
复合生物材料和生物矿化颗粒的结构复杂性源于无机构建块在多个尺度上的分层排序。尽管对复杂纳米组件的经验观察很丰富，但导致其几何复杂性的物理化学机制仍然令人费解，特别是对于尺寸不均匀的组件。我们报告了多分散硫醇金纳米片与半胱氨酸表面配体的分层组织颗粒（HOP）的自组装。图论方法表明，这些具有扭曲尖峰和其他形态的 HOP 比其生物对应物表现出更高的复杂性。它们复杂的组织源于竞争性的手性依赖性组装限制，这些限制使得组装途径主要依赖于纳米颗粒的对称性而不是尺寸。这些发现和 HOP 相图为研究具有复杂结构和不寻常的手性光学和化学性质的一大类胶体开辟了道路。
The structural complexity of composite biomaterials and biomineralized particles arises from the hierarchical ordering of inorganic building blocks over multiple scales. Although empirical observations of complex nanoassemblies are abundant, the physicochemical mechanisms leading to their geometrical complexity are still puzzling, especially for nonuniformly sized components. We report the self-assembly of hierarchically organized particles (HOPs) from polydisperse gold thiolate nanoplatelets with cysteine surface ligands. Graph theory methods indicate that these HOPs, which feature twisted spikes and other morphologies, display higher complexity than their biological counterparts. Their intricate organization emerges from competing chirality-dependent assembly restrictions that render assembly pathways primarily dependent on nanoparticle symmetry rather than size. These findings and HOP phase diagrams open a pathway to a large family of colloids with complex architectures and unusual chiroptical and chemical properties.