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Title: Passive Antifrosting Surfaces Using Microscopic Ice Patterns

Abstract

Despite exceptional recent advances in tailoring the wettability of surfaces, to date, no engineered surface can passively suppress the in-plane growth of frost that invariably occurs in humid, subfreezing environments. Here, we show that up to 90% of a surface can exhibit passive antifrosting by using chemical or physical wettability patterns to template “ice stripes” across the surface. As ice exhibits a depressed vapor pressure relative to liquid water, these sacrificial ice stripes siphon the supersaturated water vapor to keep the intermediate surface areas dry from dew and frost. Further, we show that when these sacrificial ice stripes are elevated atop microfins, they diffusively coarsen in a suspended state above the surface. As a result, the suspended state of the coarsening ice results in a diffusive growth rate an order of magnitude slower than frost coarsening directly on a solid substrate and should also minimize its adhesive strength to the surface.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1484994
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 38; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; condensation; dry zone; frost; hygroscopic; icephobicity

Citation Formats

Ahmadi, S. Farzad, Nath, Saurabh, Iliff, Grady J., Srijanto, Bernadeta R., Collier, C. Patrick, Yue, Pengtao, and Boreyko, Jonathan B. Passive Antifrosting Surfaces Using Microscopic Ice Patterns. United States: N. p., 2018. Web. doi:10.1021/acsami.8b11285.
Ahmadi, S. Farzad, Nath, Saurabh, Iliff, Grady J., Srijanto, Bernadeta R., Collier, C. Patrick, Yue, Pengtao, & Boreyko, Jonathan B. Passive Antifrosting Surfaces Using Microscopic Ice Patterns. United States. doi:10.1021/acsami.8b11285.
Ahmadi, S. Farzad, Nath, Saurabh, Iliff, Grady J., Srijanto, Bernadeta R., Collier, C. Patrick, Yue, Pengtao, and Boreyko, Jonathan B. Mon . "Passive Antifrosting Surfaces Using Microscopic Ice Patterns". United States. doi:10.1021/acsami.8b11285. https://www.osti.gov/servlets/purl/1484994.
@article{osti_1484994,
title = {Passive Antifrosting Surfaces Using Microscopic Ice Patterns},
author = {Ahmadi, S. Farzad and Nath, Saurabh and Iliff, Grady J. and Srijanto, Bernadeta R. and Collier, C. Patrick and Yue, Pengtao and Boreyko, Jonathan B.},
abstractNote = {Despite exceptional recent advances in tailoring the wettability of surfaces, to date, no engineered surface can passively suppress the in-plane growth of frost that invariably occurs in humid, subfreezing environments. Here, we show that up to 90% of a surface can exhibit passive antifrosting by using chemical or physical wettability patterns to template “ice stripes” across the surface. As ice exhibits a depressed vapor pressure relative to liquid water, these sacrificial ice stripes siphon the supersaturated water vapor to keep the intermediate surface areas dry from dew and frost. Further, we show that when these sacrificial ice stripes are elevated atop microfins, they diffusively coarsen in a suspended state above the surface. As a result, the suspended state of the coarsening ice results in a diffusive growth rate an order of magnitude slower than frost coarsening directly on a solid substrate and should also minimize its adhesive strength to the surface.},
doi = {10.1021/acsami.8b11285},
journal = {ACS Applied Materials and Interfaces},
number = 38,
volume = 10,
place = {United States},
year = {2018},
month = {9}
}

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