Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon

Bittner, Roland W.; Bica-Schröder, Katharina; Hoffmann, Helmuth

doi:10.1007/s00706-016-1888-2

Record link:

https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:3-3980
http://hdl.handle.net/20.500.12708/43

Title:

Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon

Citation:

Bittner, R. W., Bica-Schröder, K., & Hoffmann, H. (2017). Fluorine-free, liquid-repellent surfaces made from ionic liquid-infused nanostructured silicon. Monatshefte Für Chemie - Chemical Monthly, 148(1), 167–177. https://doi.org/10.1007/s00706-016-1888-2

Publisher DOI:

10.1007/s00706-016-1888-2

CatalogPlus:

AC15187471

Publication Type:

Article - Original Research Article

Language:

English

Authors:

Bittner, Roland W.
Bica-Schröder, Katharina
Hoffmann, Helmuth

Organisational Unit:

E163 - Institut für Angewandte Synthesechemie

Journal:

Monatshefte für Chemie - Chemical Monthly

ISSN:

0026-9247

Date (published):

2017

Number of Pages:

Publisher:

SPRINGER WIEN

Peer reviewed:

Yes

Keywords:

Surface; Monolayers; Nanochemistry; Ionic liquids; Wetting

Abstract:

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.

License:

CC BY 4.0