Desublimation Frosting on Nanoengineered Surfaces

ACS Nano
Christopher WalkerDimos Poulikakos

Abstract

Ice nucleation from vapor presents a variety of challenges across a wide range of industries and applications including refrigeration, transportation, and energy generation. However, a rational comprehensive approach to fabricating intrinsically icephobic surfaces for frost formation-both from water condensation (followed by freezing) and in particular from desublimation (direct growth of ice crystals from vapor)-remains elusive. Here, guided by nucleation physics, we investigate the effect of material composition and surface texturing (atomically smooth to nanorough) on the nucleation and growth mechanism of frost for a range of conditions within the sublimation domain (0 °C to -55 °C; partial water vapor pressures 6 to 0.02 mbar). Surprisingly, we observe that on silicon at very cold temperatures-below the homogeneous ice solidification nucleation limit (<-46 °C)-desublimation does not become the favorable pathway to frosting. Furthermore, we show that surface nanoroughness makes frost formation on silicon more probable. We experimentally demonstrate at temperatures between -48 °C and -55 °C that nanotexture with radii of curvature within 1 order of magnitude of the critical radius of nucleation favors frost growth, facilitat...Continue Reading

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Citations

Oct 21, 2020·Proceedings of the National Academy of Sciences of the United States of America·Henry LambleyDimos Poulikakos
May 17, 2019·Advances in Colloid and Interface Science·Peyman IrajizadHadi Ghasemi
Apr 28, 2021·Proceedings of the National Academy of Sciences of the United States of America·Hongqiang ZhangJianjun Wang
Dec 22, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Sepideh KhodaparastJoão T Cabral
Sep 28, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Siyan YangXuehu Ma
Jan 23, 2022·Communications Biology·William S Y WongKonrad Meister

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