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Switchable Surfaces Based on Freely Floating Colloidal Particles

Title data

Puretskiy, Nikolay ; Stoychev, Georgi ; Stamm, Manfred ; Ionov, Leonid:
Switchable Surfaces Based on Freely Floating Colloidal Particles.
In: ACS Applied Materials & Interfaces. Vol. 2 (27 October 2010) Issue 10 . - pp. 2944-2948.
ISSN 1944-8252
DOI: https://doi.org/10.1021/am100634m

Abstract in another language

We report a novel approach for the design of switchable surfaces using hydrophobic wax films with incorporated hydrophilic particles. It was found that native and 3-aminopropyltriethoxysilane-modified 200 nm large silica particles almost completely immerse in wax after annealing in dry environment above wax melting point. On the other hand, the degree of particles immersion in wax decreases after annealing in aqueous environment. The surface properties of the particle-wax films are, therefore, switched between hydrophobic and hydrophilic states after annealing in air and in water, respectively. The hydrophilicity/hydrophibicity can be frozen by the cooling below the wax melting point. We also demonstrated possibility to produce hydrophilic/hydrophobic pattern on wax-particle films using local heating.We report a novel approach for the design of switchable surfaces using hydrophobic wax films with incorporated hydrophilic particles. It was found that native and 3-aminopropyltriethoxysilane-modified 200 nm large silica particles almost completely immerse in wax after annealing in dry environment above wax melting point. On the other hand, the degree of particles immersion in wax decreases after annealing in aqueous environment. The surface properties of the particle-wax films are, therefore, switched between hydrophobic and hydrophilic states after annealing in air and in water, respectively. The hydrophilicity/hydrophibicity can be frozen by the cooling below the wax melting point. We also demonstrated possibility to produce hydrophilic/hydrophobic pattern on wax-particle films using local heating.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Professur Biofabrikation > Professur Biofabrikation - Univ.-Prof. Dr. Leonid Ionov
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Professur Biofabrikation
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 20 Jun 2017 12:23
Last Modified: 20 Jun 2017 12:23
URI: https://eref.uni-bayreuth.de/id/eprint/37697