透射电子显微镜
胶体金
纳米颗粒
原位
优先依附
化学物理
结晶学
配体(生物化学)
面(心理学)
材料科学
吸附
粒子(生态学)
电子显微镜
纳米技术
分辨率(逻辑)
化学
生物物理学
受体
光学
物理
物理化学
人格
有机化学
生物化学
五大性格特征
心理学
复杂网络
人工智能
计算机科学
万维网
地质学
海洋学
生物
社会心理学
作者
Chao Zhu,Suxia Liang,Erhong Song,Yuanjun Zhou,Wen Wang,Feng Shan,Yantao Shi,Ce Hao,Kuibo Yin,Tong Zhang,Jianjun Liu,Haimei Zheng,Litao Sun
标识
DOI:10.1038/s41467-018-02925-6
摘要
Abstract Inside a liquid solution, oriented attachment (OA) is now recognized to be as important a pathway to crystal growth as other, more conventional growth mechanisms. However, the driving force that controls the occurrence of OA is still poorly understood. Here, using in-situ liquid cell transmission electron microscopy, we demonstrate the ligand-controlled OA of citrate-stabilized gold nanoparticles at atomic resolution. Our data reveal that particle pairs rotate randomly at a separation distance greater than twice the layer thickness of adsorbed ligands. In contrast, when the particles get closer, their ligands overlap and guide the rotation into a directional mode until they share a common {111} orientation, when a sudden contact occurs accompanied by the simultaneous expulsion of the ligands on this surface. First-principle calculations confirm that the lower ligand binding energy on {111} surfaces is the intrinsic reason for the preferential attachment at this facet, rather than on other low-index facets.
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