Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films.

Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films. Research Abstract Details 

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Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films. Abstract Text:

Liangliang Cao,Tyler P Price,Michael Weiss,Di Gao,

We demonstrate that porous Si films fabricated by a convenient gold-assisted electroless etching process, which possess a hierarchical porous structure consisting of micrometer-sized asperities superimposed onto a network of nanometer-sized pores, are able to induce a superhydrophobic phenomenon on an intrinsically hydrophilic hydrogen-terminated Si surface and a superoleophobic phenomenon on an intrinsically oleophilic self-assembled monolayer-coated Si surface. Through comparison with porous Si films consisting of vertically aligned straight pores, which are hydrophilic and oleophilic, we show that an overhang structure resulting from the hierarchical porous structure is essential to preventing water and oil from penetrating the texture of the films and inducing the observed macroscopic superhydrophobic and superoleophobic phenomena.

Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films. Publishing Authors By Initials

L Cao,TP Price,M Weiss,D Gao,

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Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Langmuir : the ACS journal of surfaces and colloid

VOLUME: 24

Page Numbers: 1640-3

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ISSN: 0743-7463

DAY: 17

MONTH: 01

YEAR: 2008

Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Super water- and oil-repellent surfaces on intrinsically hydrophilic and oleophilic porous silicon films.

AFFILIATION: Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261.

Country: United States

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MEDLINETA: Langmuir

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