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Title
Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon
AuthorBittner, Roland W. ; Bica, Katharina ; Hoffmann, Helmuth
Published in
Monatshefte für Chemie - Chemical Monthly, 2017, Vol. 148, Issue 1, page 167-177
PublishedSpringer Vienna, 2017
LanguageEnglish
Document typeJournal Article
Keywords (EN)Surface / Monolayers / Nanochemistry / Ionic liquids / Wetting
ISSN1434-4475
URNurn:nbn:at:at-ubtuw:3-3980 Persistent Identifier (URN)
DOI10.1007/s00706-016-1888-2 
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 The work is publicly available
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Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon [1.12 mb]
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Abstract (English)

Liquid-repellent surfaces based on slippery liquid-infused porous substrates (SLIPS) were prepared from porous, nanostructured silicon surfaces with different surface functionalization, infused with the polar ionic liquid 1-ethyl-3-methylimidazolium methylsulfate ([C2mim]MeSO4). Contrary to nonpolar SLIPS based on perfluorinated substrates and infusion liquids, [C2mim]MeSO4 forms stable SLIPS with high energy surfaces like native silicon (SiSiO2) or ionic liquid-functionalized silicon (Si-[C3mim]Cl), whose liquid-repellent properties against low surface tension liquids (toluene, cyclohexane) were demonstrated by very low sliding angles ( < 3) and low contact angle hysteresis ( < 10). These polar, ionic liquid-based SLIPS present a promising, environmentally benign extension of liquid-infused substrates to natural, high-energy oxide surfaces.

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CC-BY-License (4.0)Creative Commons Attribution 4.0 International License