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Title: Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals

Abstract

Abstract Development of the surface morphology and shape of crystalline nanostructures governs the functionality of various materials, ranging from phonon transport to biocompatibility. However, the kinetic pathways, following which such development occurs, have been largely unexplored due to the lack of real-space imaging at single particle resolution. Here, we use colloidal nanoparticles assembling into supracrystals as a model system, and pinpoint the key role of surface fluctuation in shaping supracrystals. Utilizing liquid-phase transmission electron microscopy, we map the spatiotemporal surface profiles of supracrystals, which follow a capillary wave theory. Based on this theory, we measure otherwise elusive interfacial properties such as interfacial stiffness and mobility, the former of which demonstrates a remarkable dependence on the exposed facet of the supracrystal. The facet of lower surface energy is favored, consistent with the Wulff construction rule. Our imaging–analysis framework can be applicable to other phenomena, such as electrodeposition, nucleation, and membrane deformation.


Citation Formats

Ou, Zihao, Yao, Lehan, An, Hyosung, Shen, Bonan, and Chen, Qian. Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals. United Kingdom: N. p., 2020. Web. https://doi.org/10.1038/s41467-020-18363-2.
Ou, Zihao, Yao, Lehan, An, Hyosung, Shen, Bonan, & Chen, Qian. Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals. United Kingdom. https://doi.org/10.1038/s41467-020-18363-2
Ou, Zihao, Yao, Lehan, An, Hyosung, Shen, Bonan, and Chen, Qian. Fri . "Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals". United Kingdom. https://doi.org/10.1038/s41467-020-18363-2.
@article{osti_1659526,
title = {Imaging how thermal capillary waves and anisotropic interfacial stiffness shape nanoparticle supracrystals},
author = {Ou, Zihao and Yao, Lehan and An, Hyosung and Shen, Bonan and Chen, Qian},
abstractNote = {Abstract Development of the surface morphology and shape of crystalline nanostructures governs the functionality of various materials, ranging from phonon transport to biocompatibility. However, the kinetic pathways, following which such development occurs, have been largely unexplored due to the lack of real-space imaging at single particle resolution. Here, we use colloidal nanoparticles assembling into supracrystals as a model system, and pinpoint the key role of surface fluctuation in shaping supracrystals. Utilizing liquid-phase transmission electron microscopy, we map the spatiotemporal surface profiles of supracrystals, which follow a capillary wave theory. Based on this theory, we measure otherwise elusive interfacial properties such as interfacial stiffness and mobility, the former of which demonstrates a remarkable dependence on the exposed facet of the supracrystal. The facet of lower surface energy is favored, consistent with the Wulff construction rule. Our imaging–analysis framework can be applicable to other phenomena, such as electrodeposition, nucleation, and membrane deformation.},
doi = {10.1038/s41467-020-18363-2},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United Kingdom},
year = {2020},
month = {9}
}

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https://doi.org/10.1038/s41467-020-18363-2

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