We design 3D-printed motor-driven active particles and find that their dynamics can be characterized using the model of overdamped chiral active Brownian particles (ABPs), as demonstrated by measured angular statistics and translational mean squared displacements (MSDs). Furthermore, we propose a minimal model that reproduces the double-peak velocity distributions and further predicts a transition from the single-peak to the double-peak displacement distributions in short-time regimes. The model provides a clear physics picture of these phenomena, originating from the competition between the active motion and the translational diffusion. Our experiments confirm such picture. The minimal model enhances our understanding of activity-driven non-Gaussian phenomena. The designed particles could be further applied in the study of collective chiral motions.
Free chiral self-propelled robots compared to active Brownian circle swimmers
Institut für Theoretische Physik, Universität Innsbruck（因斯布鲁克大学理论物理研究所）；The Raymond and Beverley School of Chemistry, Tel Aviv University（特拉维夫大学雷蒙德和贝弗利化学学院）
Screw Symmetry, Chiral Hydrodynamics and Odd Instability in Active Cholesterics
University of Warwick（华威大学）；University of Chicago（芝加哥大学）；University of Cambridge（剑桥大学）；Indian Institute of Science（印度科学学院）；Tata Institute of Fundamental Research（塔塔基础研究所）
Chirality, confinement and dimensionality govern re-entrant transitions in active matter
Indian Institute of Science Education and Research Mohali（印度科学教育研究所莫哈利分校）；Tata Institute of Fundamental Research（塔塔基础研究所）；University of Vermont（佛蒙特大学）；Institute of Physics（物理研究所）；Homi Bhabha National Institute（霍米·巴哈国家研究所）
