SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 22: Poster II
Q 22.81: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Anisotropic properties of light-propelled microswimmers — •Elena Vinnemeier1, Matthias Rüschenbaum1, Cornelia Denz1,2, and Jörg Imbrock1 — 1Institut für Angewandte Physik, Münster, Deutschland — 2Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Deutschland
Self-propelled particles enable versatile applications in various fields like in colloidal systems or in biomedicine. Utilizing light as an energy source is advantageous, since a fuel-free and highly controllable motion is possible. We demonstrate a novel propulsion mechanism relying solely on refraction of light, while an asymmetric particle shape and a symmetry-broken refractive index profile lead to a directional propulsion force. For fabrication of microswimmers direct laser writing by two-photon polymerization is employed. We compare the performance of these light-propelled particles with respect to velocity and directionality for different geometries and refractive index gradients.