Regulation of Ice Growth by Hyperbranched Polymeric Agents forming Dynamics Hydrogen Bonding with Ice
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Over the past 20 years, significant advancements have been made in the field of synthetic polymer chemistry. These advancements now allow for the design and precise synthesis of complex architectures capable of controlling the shape, size, and functionality of the polymer. As a result, we have seen the emergence of synthetic materials that can mimic protein functions but with greater scalability and tunability. In this presentation, we report a unique finding that a single type of hyperbranched polymeric agent can exhibit both inhibitory and promotional activities towards ice growth. We identified the dynamic formation of hydrogen bonds at the ice/water interface, as regulated by the polymer, as the critical factor determining the fate of ice growth. Specifically, repeated formation-dissociation promotes epitaxial ice growth, while steady H-bonding leads to inhibition. This discovery is expected to deepen the fundamental understanding of ice growth and affect current technological applications that require ice control.