Superhydrophobic metallic surfaces and theirwetting properties

Edward Bormashenko; Tamir Stein; Gene Whyman; Roman Pogreb; Semion Sutovsky; Yifat Danoch; Yamit Shoham; Yelena Bormashenko; Boris Sorokov; Doron Aurbach

Superhydrophobic metallic surfaces and theirwetting properties

Edward Bormashenko, Tamir Stein, Gene Whyman, Roman Pogreb, Semion Sutovsky, Yifat Danoch, Yamit Shoham, Yelena Bormashenko, Boris Sorokov, Doron Aurbach

Department of Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

Two-scaled polymer patterns possessing high roughness are produced using the hot-embossing technique and coating with chromium. After covering the rough polymer surface with this metal, the resulting surface demonstrates pronounced hydrophobic properties, with water drops having apparent contact angles as high as 150°. As revealed by SEM, the surface is patterned on two scales which is known to be an important condition for superhydrophobicity of inherently wettable surfaces. The modified Cassie-Baxter approach has been used for the present relief. The calculated values of the apparent contact angles agree with the observed ones. It is important to note that the apparent contact angles almost do not depend on the local contact angles.

Original language	English
Title of host publication	Superhydrophobic Surfaces
Publisher	CRC Press
Pages	233-240
Number of pages	8
ISBN (Electronic)	9789004193338
ISBN (Print)	9789004165939
State	Published - 1 Jan 2009

Bibliographical note

Publisher Copyright:
© 2009 by Koninklijke Brill NV Leiden The Netherlands.

Keywords

Cassie-Baxter model
Hierarchical patterns
Superhydrophobicity
Wetting of metals

Cite this

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AU - Bormashenko, Edward

AU - Stein, Tamir

AU - Whyman, Gene

AU - Pogreb, Roman

AU - Sutovsky, Semion

AU - Danoch, Yifat

AU - Shoham, Yamit

AU - Bormashenko, Yelena

AU - Sorokov, Boris

AU - Aurbach, Doron

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AB - Two-scaled polymer patterns possessing high roughness are produced using the hot-embossing technique and coating with chromium. After covering the rough polymer surface with this metal, the resulting surface demonstrates pronounced hydrophobic properties, with water drops having apparent contact angles as high as 150°. As revealed by SEM, the surface is patterned on two scales which is known to be an important condition for superhydrophobicity of inherently wettable surfaces. The modified Cassie-Baxter approach has been used for the present relief. The calculated values of the apparent contact angles agree with the observed ones. It is important to note that the apparent contact angles almost do not depend on the local contact angles.

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KW - Wetting of metals

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Superhydrophobic metallic surfaces and theirwetting properties

Abstract

Bibliographical note

Keywords

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