Hydrophobic surface with geometric roughness pattern
OwnerBharat Bhushan, Michael Nosonovskyinventors
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Abstract
A hydrophobic surface comprising a substrate and a roughened surface structure oriented on the substrate material is provided. The substrate comprises a surface, which is at least partially hydrophobic with a contact angle to liquid of 90° or greater. The roughened surface structure comprises a plurality of asperities arranged in a geometric pattern according to a roughness factor, wherein the roughness factor is characterized by a packing parameter p that equals the fraction of the surface area of the substrate covered by the asperities. The p parameter has a value from between about 0.5 to about 1.
Claims20
A hydrophobic surface comprising:
- a substrate wherein a surface of the substrate is at least partially hydrophobic with a contact angle to liquid of 90° or greater;
- and
- a roughened surface structure oriented on the substrate material, wherein the roughened surface structure comprises a plurality of asperities arranged in a geometric pattern according to a roughness factor, the roughness factor characterized by a packing parameterp that equals the fraction of the surface area of the substrate covered by the asperities, wherein p has a value of from between about 0.5 to about 1.
Dependencies are inferred from the claim text.