Journal
MOLECULES
Volume 26, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/molecules26020392
Keywords
nucleation; ice; heterogeneous nucleation; classical nucleation theory; organic ice nucleator; memory effect; surface nucleation; immersion nucleation; contact nucleation; multi-step nucle-ation
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2019-04241]
- MDPI
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The nucleation of ice is crucial in various fields such as cloud physics, medicine, and food engineering. However, two major unresolved challenges are the lack of a molecular-level picture of ice nucleation at an interface and limitations of classical nucleation theory.
The nucleation of ice is vital in cloud physics and impacts on a broad range of matters from the cryopreservation of food, tissues, organs, and stem cells to the prevention of icing on aircraft wings, bridge cables, wind turbines, and other structures. Ice nucleation thus has broad implications in medicine, food engineering, mineralogy, biology, and other fields. Nowadays, the growing threat of global warming has led to intense research activities on the feasibility of artificially modifying clouds to shift the Earth's radiation balance. For these reasons, nucleation of ice has been extensively studied over many decades and rightfully so. It is thus not quite possible to cover the whole subject of ice nucleation in a single review. Rather, this feature article provides a brief overview of ice nucleation that focuses on several major outstanding fundamental issues. The author's wish is to aid early researchers in ice nucleation and those who wish to get into the field of ice nucleation from other disciplines by concisely summarizing the outstanding issues in this important field. Two unresolved challenges stood out from the review, namely the lack of a molecular-level picture of ice nucleation at an interface and the limitations of classical nucleation theory.
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