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Reversible Surface Wettability by Silanization

Brehm, Marius; Scheiger, Johannes M.; Welle, Alexander; Levkin, Pavel A.

Abstract:
The chemistry and wettability of oxygen containing surfaces can be conveniently modified by silanization with various organosilanes which form SiO bonds on the surface. This work shows that a superhydrophobic nanoporous polymer coating can be reverted to its previous hydrophilic state by removing the fluoroalkyl silane with fluoride anions using tetrabutyl ammonium fluoride. This leads to a completely reversible process of silanization and desilanization which can be performed in less than 2 min for each step as proven by droplet shape analysis and secondary ion mass spectrometry. Additionally, the desilanization solution can be applied spatially by an automated liquid dispenser or manually by a brush, leading to patterns with different wettability, such as droplet microarrays or liquid channels.

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Verlagsausgabe §
DOI: 10.5445/IR/1000119092/pub
Veröffentlicht am 15.05.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische und Chemische Systeme (IBCS)
Institut für Funktionelle Grenzflächen (IFG)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 23.06.2020
Sprache Englisch
Identifikator ISSN: 2196-7350, 2196-7350
KITopen-ID: 1000119092
HGF-Programm 47.01.01 (POF III, LK 01) Biol.Netzwerke u.Synth.Regulat. ITG+ITC
Erschienen in Advanced materials interfaces
Verlag Wiley
Band 7
Heft 12
Seiten Art. Nr.: 1902134
Vorab online veröffentlicht am 06.05.2020
Nachgewiesen in Web of Science
Scopus
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