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Reversible switching of wetting properties and erasable patterning of polymer surfaces using plasma oxidation and thermal treatment
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SYSNO ASEP 0497613 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reversible switching of wetting properties and erasable patterning of polymer surfaces using plasma oxidation and thermal treatment Author(s) Rashid, Z. (TR)
Atay, I. (TR)
Soydan, S. (TR)
Yagci, Y. (TR)
Jonáš, Alexandr (UPT-D) RID, SAI, ORCID
Yilgor, E. (TR)
Kiraz, A. (TR)
Yilgor, I. (TR)Number of authors 8 Source Title Applied Surface Science. - : Elsevier - ISSN 0169-4332
Roč. 441, MAY (2018), s. 841-852Number of pages 12 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords reversible wetting ; plasma oxidation ; superhydrophobic ; superhydrophilic Subject RIV BH - Optics, Masers, Lasers OECD category Coating and films Institutional support UPT-D - RVO:68081731 UT WOS 000427816400099 EID SCOPUS 85042120620 DOI 10.1016/j.apsusc.2018.02.089 Annotation Polymer surfaces reversibly switchable from superhydrophobic to superhydrophilic by exposure to oxygen plasma and subsequent thermal treatment are demonstrated. Two inherently different polymers, hydrophobic segmented polydimethylsiloxane-urea copolymer (TPSC) and hydrophilic poly(methyl methacrylate) (PMMA) are modified with fumed silica nanoparticles to prepare superhydrophobic surfaces with roughness on nanometer to micrometer scale. Smooth TPSC and PMMA surfaces are also used as control samples. Regardless of their chemical structure and surface topography, all surfaces display completely reversible wetting behavior changing from hydrophobic to hydrophilic and back for many cycles upon plasma oxidation followed by thermal annealing. Influence of plasma power, plasma exposure time, annealing temperature and annealing time on the wetting behavior of polymeric surfaces are investigated. Surface compositions, textures and topographies are characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and white light interferometry (WLI), before and after oxidation and thermal annealing. Wetting properties of the surfaces are determined by measuring their static, advancing and receding water contact angle. We conclude that the chemical structure and surface topography of the polymers play a relatively minor role in reversible wetting behavior, where the essential factors are surface oxidation and migration of polymer molecules to the surface upon thermal annealing. Reconfigurable water channels on polymer surfaces are produced by plasma treatment using a mask and thermal annealing cycles. Such patterned reconfigurable hydrophilic regions can find use in surface microfluidics and optofluidics applications. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2019
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