Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 29: Photonics
Q 29.6: Talk
Wednesday, March 13, 2024, 12:15–12:30, HS 1221
Light-propelled anisotropic refractive microswimmers — •Matthias Rüschenbaum1, Elena Vinnemeier1, Jörg Imbrock1, and Cornelia Denz1,2 — 1Institute of Applied Physics, Münster, Germany — 2Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
Self-propelled microswimmers offer a wide range of applications, for example in biomedicine or colloidal systems. Among the various drive mechanisms, light-propelled microswimmers offer many advantages such as high biocompatibility and precise control. In our approach, the refraction of light provides a directed propulsion for the particles. These particles have an asymmetric geometry and are several micrometers in size. In addition, chiral particle shapes ensure a rotating motion. The light-driven microswimmers are fabricated by direct laser writing using two-photon polymerization, which enables high versatility and accuracy. The laser light-induced movement is then evaluated and compared for the different particle shapes.
Keywords: Microswimmers; Two-photon polymerization; Light-propelled; Refractive index; Chirality