Modulation of wettability, gradient and adhesion on self-assembled monolayer by counterion exchange and pH
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F18%3A63518924" target="_blank" >RIV/70883521:28110/18:63518924 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jcis.2017.10.086" target="_blank" >http://dx.doi.org/10.1016/j.jcis.2017.10.086</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jcis.2017.10.086" target="_blank" >10.1016/j.jcis.2017.10.086</a>
Alternative languages
Result language
angličtina
Original language name
Modulation of wettability, gradient and adhesion on self-assembled monolayer by counterion exchange and pH
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20506 - Coating and films
Result continuities
Project
—
Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Colloid and Interface Science
ISSN
0021-9797
e-ISSN
—
Volume of the periodical
512
Issue of the periodical within the volume
Neuveden
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
511-521
UT code for WoS article
000418729500057
EID of the result in the Scopus database
2-s2.0-85032382013