| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Richter, Andreas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Design, simulation and experimental analysis of a monolithic bending section for enhanced maneuverability of single use laparoscopic devicescitations
- 2024Direct reduction of iron ore pellets by N2/H2 mixture: In-situ investigation and modelling of the surface temperature during reduction progressioncitations
- 2024Direct reduction of iron ore pellets by N 2 /H 2 mixture: In-situ investigation and modelling of the surface temperature during reduction progressioncitations
- 2023A Review of Top Submerged Lance (TSL) Processing—Part II: Thermodynamics, Slag Chemistry and Plant Flowsheetscitations
- 2023Properties oriented WAAM—microstructural and geometrical control in WAAM of low-alloy steelcitations
- 2022Electromechanical Model of Dielectric Elastomer Transducerscitations
- 2020Surface and mechanical analysis of metallized poly(dimethylsiloxane) gel for varifocal micromirrorscitations
- 2016Simulation of controllable permeation in PNIPAAm coated membranescitations
- 2016Elastomer based electrically tunable, optical microcavitiescitations
- 2012Material platform for dielectric elastomer actuators-important properties of the investigated material and long-term stability characteristics of the actuator layers
- 2005pH sensors based on polyelectrolytic hydrogelscitations
- 2000Verfahren zum Bestimmen physikalischer Größen von ein- oder mehrkomponentigen Flüssigkeiten
Places of action
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article
Surface and mechanical analysis of metallized poly(dimethylsiloxane) gel for varifocal micromirrors
Abstract
<p>Varifocal micromirrors are alternative and miniaturized mirror systems that are used for imaging procedures in biomedical diagnostics, mirror-based tunable lenses, or the correction of spherical aberration. In this study, we demonstrate a new concept for focal length variation by electrostatic mirror deformation of a compact and integrated electroactive polymer actuator based on metallized poly(dimethylsiloxane) (PDMS) gel thin films. The varifocal micromirrors have a lateral size of 70 x 70 mu m(2) and are capable of deforming in either convex or concave direction, depending on a defined surface treatment by O-2-plasma or UV/ozone of the PDMS prior to metallization by physical vapor deposition (PVD). Surface and interface analysis by wetting experiments, sputter depth-profiling X-ray photoelectron spectroscopy (XPS) combined with scanning electron microscopy (SEM) on cross-sections processed with focused ion beam (FIB) as well as polymer and metal surfaces are used to understand and to improve the metal film growth and quality with respect to high reflectivity and conductivity. In addition to the high quality of the metallic mirror layer, the mirror displacement is important and inevitably depends on the gel stiffness of the actuator. Therefore, we investigate the gel mechanics and the performance of the actuator with rheology, confocal microscopy, and image formation on the electrically deformed mirrors. Our concept of varifocal micromirrors offers a wide range of applications for tunable mirror-based optics due to their simple and compact design.</p>