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Title: Defect-mediated ripening of core-shell nanostructures
Authors: Zhang, Qiubo
Peng, Xinxing
Nie, Yifan
Zheng, Qi
Shangguan, Junyi
Zhu, Chao
Bustillo, Karen C.
Ercius, Peter
Wang, Linwang
Limmer, David T.
Zheng, Haimei
Keywords: Engineering::Materials
Issue Date: 2022
Source: Zhang, Q., Peng, X., Nie, Y., Zheng, Q., Shangguan, J., Zhu, C., Bustillo, K. C., Ercius, P., Wang, L., Limmer, D. T. & Zheng, H. (2022). Defect-mediated ripening of core-shell nanostructures. Nature Communications, 13(1), 2211-.
Journal: Nature Communications 
Abstract: Understanding nanostructure ripening mechanisms is desirable for gaining insight on the growth and potential applications of nanoscale materials. However, the atomic pathways of nanostructure ripening in solution have rarely been observed directly. Here, we report defect-mediated ripening of Cd-CdCl2 core-shell nanoparticles (CSN) revealed by in-situ atomic resolution imaging with liquid cell transmission electron microscopy. We find that ripening is initiated by dissolution of the nanoparticle with an incomplete CdCl2 shell, and that the areas of the Cd core that are exposed to the solution are etched first. The growth of the other nanoparticles is achieved by generating crack defects in the shell, followed by ion diffusion through the cracks. Subsequent healing of crack defects leads to a highly crystalline CSN. The formation and annihilation of crack defects in the CdCl2 shell, accompanied by disordering and crystallization of the shell structure, mediate the ripening of Cd-CdCl2 CSN in the solution.
ISSN: 2041-1723
DOI: 10.1038/s41467-022-29847-8
Schools: School of Materials Science and Engineering 
Rights: © The Author(s) 2022. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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