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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