Geometric tuning of self-propulsion for Janus catalytic particles
Nature Publishing Group
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Michelin, S., & Lauga, E. L. (2017). Geometric tuning of self-propulsion for Janus catalytic particles. Scientific Reports, 7 (42264)https://doi.org/10.1038/srep42264
Catalytic swimmers have attracted much attention as alternatives to biological systems for examining collective microscopic dynamics and the response to physico-chemical signals. Yet, understanding and predicting even the most fundamental characteristics of their individual propulsion still raises important challenges. While chemical asymmetry is widely recognized as the cornerstone of catalytic propulsion, different experimental studies have reported that particles with identical chemical properties may propel in opposite directions. Here, we show that, beyond its chemical properties, the detailed shape of a catalytic swimmer plays an essential role in determining its direction of motion, demonstrating the compatibility of the classical theoretical framework with experimental observations.
chemical engineering, fluid dynamics
This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under grant agreements 714027 (S.M.) and 682754 (E.L.).
ECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (682754)
External DOI: https://doi.org/10.1038/srep42264
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263225