Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 68: Microfluidics (joint session DY/CPP)

CPP 68.7: Vortrag

Freitag, 5. April 2019, 11:45–12:00, H6

Aligning beads with boxing gloves — •Archit Bhatnagar¹, Anatol Fritsch¹, Matthäus Mittasch¹, Michael Nestler², Matthias Loidolt¹, Axel Voigt², and Moritz Kreysing¹ — ¹MPI of Cell Biology, Dresden — ²Department of Mathematics, TU Dresden

Recently we have described that we can move the cytoplasm of cells and developing embryos in a non-invasive manner. For this we made use of thermoviscous flows (1).

Here we ask the question if these long-ranged flow fields can in principle also be used for the precision alignment of colloids, an endeavor that seems as reasonable as trying to align small beads while wearing boxing gloves. Simulations, however, suggest that series of flow fields can be found to align multiple colloids at the same time, even if these particles are closely spaced.

We follow this strategy experimentally and will report the feasibility, precision limits due to the brownian motion of particles, and prospects for colloidal physics and applications in biology.

References: (1) Mittasch et al., " Non-invasive perturbations of intracellular flow reveal physical principles of cell organization", Nature Cell Biology 1 (2018)