Modulation of wettability, gradient and adhesion on self-assembled monolayer by counterion exchange and pH

Mosnáček, Jaroslav; Popelka, Anton; Osička, Josef; Filip, Jaroslav; Ilčíková, Markéta; Kollár, Jozef; Yousaf, Ammar B.; Bertók, Tomáš; Tkáč, Jan; Kasák, Peter

dc.title	Modulation of wettability, gradient and adhesion on self-assembled monolayer by counterion exchange and pH	en
dc.contributor.author	Mosnáček, Jaroslav
dc.contributor.author	Popelka, Anton
dc.contributor.author	Osička, Josef
dc.contributor.author	Filip, Jaroslav
dc.contributor.author	Ilčíková, Markéta
dc.contributor.author	Kollár, Jozef
dc.contributor.author	Yousaf, Ammar B.
dc.contributor.author	Bertók, Tomáš
dc.contributor.author	Tkáč, Jan
dc.contributor.author	Kasák, Peter
dc.relation.ispartof	Journal of Colloid and Interface Science
dc.identifier.issn	0021-9797 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued	2018
utb.relation.volume	512
dc.citation.spage	511
dc.citation.epage	521
dc.type	article
dc.language.iso	en
dc.publisher	Academic Press Ltd.Elsevier Science Ltd.
dc.identifier.doi	10.1016/j.jcis.2017.10.086
dc.relation.uri	https://www.sciencedirect.com/science/article/pii/S0021979717312559
dc.subject	Adsorption	en
dc.subject	Counterion exchange	en
dc.subject	Self-assembled monolayer	en
dc.subject	Superwettability	en
dc.subject	Wettability gradient	en
dc.description.abstract	In this study, two quaternary ammonium salts derived from L-lipoic acid were applied for self-assembled monolayers formation on rough structured gold surface. The derivatives differ in functionality since one possesses simple quaternary ammonium group whereas the other one is carboxybetaine ester containing quaternary ammonium group with pH hydrolysable ester group as a pendant. The response of surface wettability to ion exchange between Cl− and perfluorooctanoate, kinetics and gradient wettability were examined by water contact angle measurement and confirmed by X-ray photoelectron spectroscopy. Furthermore, adhesion forces related to applied counterion on the entire surface and after hydrolysis were investigated by atomic force microscopy measurement at nanometer scales. A dramatic change in wettability upon counterion exchange from superhydrophilic for Cl− to very or superhydrophobic for perfluorooctanoate in a repeatable manner was observed for both derivatives. Kinetics of counterion exchanges revealed faster hydration of simple quaternary derivate. The wettability gradient could be designed from superhydrophobic to superhydrophilic either in a reversible manner by simple immersion of the modified surface in a counterion solution modulated by ionic strength or in an irreversible manner for carboxybetaine ester derivate by time-controlled hydrolysis to charge balanced carboxybetaine. © 2017 Elsevier Inc.	en
utb.faculty	Faculty of Technology
dc.identifier.uri	http://hdl.handle.net/10563/1007570
utb.identifier.obdid	43878224
utb.identifier.scopus	2-s2.0-85032382013
utb.identifier.wok	000418729500057
utb.identifier.pubmed	29096112
utb.identifier.coden	JCISA
utb.source	j-scopus
dc.date.accessioned	2018-01-15T16:31:29Z
dc.date.available	2018-01-15T16:31:29Z
dc.description.sponsorship	QUUG-CAM-2017-1, QU, Qatar University
dc.description.sponsorship	Qatar University [QUUG-CAM-2017-1]; NPRP grant from the Qatar National Research Fund (Qatar Foundation) [NPRP-6-381-1-078, NPRP-9-219-2-105]
utb.contributor.internalauthor	Filip, Jaroslav
utb.fulltext.affiliation	Jaroslav Mosnáček a,b , Anton Popelka a , Josef Osicka a , Jaroslav Filip c , Marketa Ilcikova a,b , Jozef Kollar a,b , Ammar B. Yousaf a , Tomas Bertok d , Jan Tkac d , Peter Kasak a, ⇑ a Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar b Polymer Institute, Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava, Slovak Republic c Department of Environment Protection Engineering, Tomas Bata University, Vavreckova 275, 760 01 Zlin, Czech Republic d Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravská cesta 9, 845 38 Bratislava, Slovak Republic ⇑ Corresponding author. E-mail address: [email protected] (P. Kasak).
utb.fulltext.dates	Received 13 September 2017 Revised 18 October 2017 Accepted 23 October 2017 Available online 25 October 2017
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utb.fulltext.sponsorship	The authors gratefully acknowledge Mr Ahmed Suliman, Gas Processing Center Qatar University, for carrying out the XPS analysis. This publication was supported by Qatar University Grant QUUG-CAM-2017-1. This publication was made possible by NPRP grant # NPRP-6-381-1-078 and NPRP-9-219-2-105 from the Qatar National Research Fund (member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
utb.scopus.affiliation	Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar; Polymer Institute, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava, Slovakia; Department of Environment Protection Engineering, Tomas Bata University, Vavreckova 275, Zlin, Czech Republic; Department of Glycobiotechnology, Institute of Chemistry, Slovak Academy of Sciences, Dubravská cesta 9, Bratislava, Slovakia
utb.fulltext.projects	QUUG-CAM-2017-1
utb.fulltext.projects	NPRP-6-381-1-078
utb.fulltext.projects	NPRP-9-219-2-105