US 12,420,906 B2
Hybrid surface designs with passive diffusion-limited deposition capabilities
Christian John Machado, Evanston, IL (US); Kyoo-Chul Kenneth Park, Evanston, IL (US); Jiaxing Huang, Wilmette, IL (US); and Haiyue Huang, Evanston, IL (US)
Assigned to Northwestern University, Evanston, IL (US)
Filed by Northwestern University, Evanston, IL (US)
Filed on Mar. 16, 2022, as Appl. No. 17/695,990.
Claims priority of provisional application 63/280,476, filed on Nov. 17, 2021.
Claims priority of provisional application 63/161,803, filed on Mar. 16, 2021.
Prior Publication US 2022/0297819 A1, Sep. 22, 2022
Int. Cl. B64C 3/36 (2006.01); B05D 5/08 (2006.01)
CPC B64C 3/36 (2013.01) [B05D 5/08 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A surface texture comprising:
a three-dimensional structure, a cross-section of which includes a first serration and a second serration, wherein:
the first serration has a first peak having a height measured from a base of the three-dimensional structure to a top of the first serration;
a valley is formed in between the first serration and the second serration, wherein the valley has a length measured from a base of the first serration to a base of the second serration; and
the first serration has a vertex angle that forms the first peak, wherein the height and the vertex angle are controlled such that freezing of condensate begins at the first peak; and
a water adsorbing coating that covers only the valley such that the water adsorbing coating is not included on the first serration or the second serration, wherein the water adsorbing coating helps the valley to remain free of frost.