Print Email Facebook Twitter High-Frequency Surface Dynamics at an Electroactive Polymer Producing Underwater Soundwaves Title High-Frequency Surface Dynamics at an Electroactive Polymer Producing Underwater Soundwaves Author Visschers, Fabian L.L. (Eindhoven University of Technology) Massaad Mouawad, J.M. (TU Delft ImPhys/Medical Imaging) van Neer, P.L.M.J. (TU Delft ImPhys/Medical Imaging; TU Delft BUS/TNO STAFF; TNO) Verweij, M.D. (TU Delft ImPhys/Medical Imaging; Erasmus MC) Liu, Danqing (Eindhoven University of Technology; South China Normal University) Broer, Dirk J. (Eindhoven University of Technology; South China Normal University) Date 2022 Abstract Coatings with dynamic surface structures are appealing to many applications like haptics and soft robotics. Restrictively, the speed of the surface dynamics in these coatings is often limited to frequencies below 1 kHz, which makes them unsuitable for applications like acoustics and communication optics. This work describes a method to create high-frequency surface dynamics controlled by alternating electric fields on a substrate-contact-modulated coating that consists of an elastic poly(dimethyl siloxane) network supported by SU-8 microstructures. The principle is based on the global application of Maxwell stress that is locally resisted by the supporting SU-8 microstructures. In-between the microstructures the elastic material is stretched, causing a large deformation of the surface topography, which is supported by the authors’ finite element method models. By applying a high-frequency alternating field, they discovered resonance effects at frequencies up to 230 kHz, where the surface of the coating vibrates at high speeds and large amplitudes. At these high frequencies, the coatings can produce and detect ultrasound waves underwater, indicating their potential for ultrasound transducers in the future. Subject AC electric fieldsacousticsdynamic surfacesMaxwell stressesPDMSSU-8 To reference this document use: http://resolver.tudelft.nl/uuid:50740f0d-a229-4bb2-b030-e2924e8aa142 DOI https://doi.org/10.1002/adfm.202110754 ISSN 1616-301X Source Advanced Functional Materials, 32 (21) Part of collection Institutional Repository Document type journal article Rights © 2022 Fabian L.L. Visschers, J.M. Massaad Mouawad, P.L.M.J. van Neer, M.D. Verweij, Danqing Liu, Dirk J. Broer Files PDF Adv_Funct_Materials_2022_ ... rwater.pdf 1.67 MB Close viewer /islandora/object/uuid:50740f0d-a229-4bb2-b030-e2924e8aa142/datastream/OBJ/view