title: Switchable surface structured hydrogel coatings.
abstract: Switchable surface structures based on hydrogels are an emerging field in material science, microfluidics, soft robotics and anti-fouling. Here, we describe a novel method that uses a photo-cross-linkable terpolymer to create a hydrogel coating with a switchable surface structure. The terpolymer is based on poly(N-isopropylacrylamide) (PNIPAm) and it is shown that simple coating technologies like slit die coating can be used under ambient conditions. It is also shown that the swelling ratio of the coating is controlled by the energy dose of ultraviolet (UV) light. Simple and complex surface structures were created using respectively single or multiple UV illumination steps through masks and it is shown that the hydrogel coatings can be reversibly switched from a structured state to a flat state with temperature.
authors.affiliation: Dept. of Chemical Engineering and Chemistry, Functional Organic Materials & Devices (SFD), Eindhoven University of Technology, Building 14 - HELIX STO 0.26, De Rondom 70 - 5612 AP, P.O. Box 513 - 5600 MB, Eindhoven, The Netherlands. s.kommeren@tue.nl.
authors.forename: Sander
authors.identifier: http://orcid.org/0000-0002-9163-2470
authors.initials: S
authors.lastname: Kommeren
authors.affiliation: Institute for Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Dongmo
authors.affiliation: Dept. of Chemical Engineering and Chemistry, Functional Organic Materials & Devices (SFD), Eindhoven University of Technology, Building 14 - HELIX STO 0.26, De Rondom 70 - 5612 AP, P.O. Box 513 - 5600 MB, Eindhoven, The Netherlands. s.kommeren@tue.nl and School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
authors.forename: C W M
authors.initials: CWM
authors.lastname: Bastiaansen