Molecularly resolved mapping of heterogeneous ice nucleation and crystallization pathways using in-situ cryo-TEM

Zibing Wang, Zifeng Yuan, Mouyang Cheng, Xudan Huang, Keyang Liu, Yihan Wang, Huacong Sun, Lei Liao, Zhi Xu, Ji Chen, Wenlong Wang, Lei Liu, Xuedong Bai (), Limei Xu (), Enge Wang () and Lifen Wang ()
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Zibing Wang: Chinese Academy of Sciences
Zifeng Yuan: Peking University
Mouyang Cheng: Peking University
Xudan Huang: Chinese Academy of Sciences
Keyang Liu: Peking University
Yihan Wang: Peking University
Huacong Sun: Chinese Academy of Sciences
Lei Liao: Chinese Academy of Sciences
Zhi Xu: Songshan Lake Laboratory for Materials Science
Ji Chen: Peking University
Wenlong Wang: Chinese Academy of Sciences
Lei Liu: Peking University
Xuedong Bai: Chinese Academy of Sciences
Limei Xu: Peking University
Enge Wang: Chinese Academy of Sciences
Lifen Wang: Chinese Academy of Sciences

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Crystallization plays a fundamental role in diverse fields such as glaciology, geology, biology, and materials science. Among various crystallizing systems, the formation of ice remains elusive, despite decades of intensive investigation. In this study, we integrate in-situ cryogenic transmission electron microscopy with molecular dynamics simulations to develop a molecular-resolution mapping and thermodynamic framework for deposition freezing under low-temperature, low-pressure conditions. Our results demonstrate that ice formation on rapidly cooled substrates, representing far-from-equilibrium states, proceeds via an adsorption-mediated, barrierless pathway of heterogeneous ice nucleation, followed by progression toward thermodynamic equilibrium. This process is unveiled to involve a series of distinct yet interconnected steps, including amorphous ice adsorption, spontaneous nucleation and growth of ice I, Ostwald ripening, Wulff construction, oriented coalescence, and aggregation, all governed by interfacial free energy minima. Our findings offer direct molecular-level insight into the mechanisms of heterogeneous ice nucleation, enrich current understanding of non-classical nucleation pathways, and emphasize the critical role of interfacial energetics in shaping ice crystal morphology and quality.

Date: 2025
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DOI: 10.1038/s41467-025-62900-w

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