Title: Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon
Language: English
Authors: Bittner, Roland 
Schröder, Katharina  
Hoffmann, Helmuth 
Category: Original Research Article
Issue Date: 2017
Journal: Monatshefte für Chemie - Chemical Monthly 
ISSN: 0026-9247
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 (Si–SiO2) 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 (α < 3°) and low contact angle hysteresis (Δθ < 10°). These polar, ionic liquid-based SLIPS present a promising, environmentally benign extension of liquid-infused substrates to natural, high-energy oxide surfaces.
Keywords: Surface; Monolayers; Nanochemistry; Ionic liquids; Wetting
DOI: 10.1007/s00706-016-1888-2
Library ID: AC15187471
URN: urn:nbn:at:at-ubtuw:3-3980
Organisation: E163 - Institut für Angewandte Synthesechemie 
Publication Type: Article
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