Active Motion of Mesoscopic Interfaces

Precipitation induced filament pattern of injected fluid controlled by structured cell

Droplet duos on water display pairing, autonomous motion, periodic eruption

Pairing-induced motion of source and inert particles driven by surface tension

I study active flows induced by mesoscopic interfaces such as droplets, vesicles, and colloids. These flows are driven by chemical reactions and external electric fields, leading to non-trivial interfacial dynamics.

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Collective Motions in Biological and Synthetic Systems

Arrested coarsening in active colloidal suspensions driven by nonreciprocal electrohydrodynamic interactions

Self-emergent vortex flow of microtubule and kinesin in cell-sized droplets under water/water phase separation

Edge Current and Pairing Order Transition in Chiral Bacterial Vortex

My work explores active flows and pattern formation in biological and biomimetic systems, including cytoskeletal active matter and confined geometries.

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Reduced Models and Stochastic Dynamics

Active Motion of microtubule bundles driven by dyneinmotors

Collective motion of active particles with finite memory in their carving motion

Heat differentiated by projection from particles’ trajectories onto the particle number-density field

I develop reduced mathematical descriptions, including effective stochastic equations, to extract essential dynamical principles from complex systems.

History

Please also see Sumino Lab website for more details.

• 2025-present: Sabbatical at Univesity of Surrey, UK
• 2024–present: Professor, Tokyo University of Science
• 2019–2024: Associate Professor, Tokyo University of Science
• 2014–2019: Jr. Associate Professor, Tokyo University of Science
• 2013–2014: Jr. Associate Professor, Aichi University of Education
• 2011–2013: Assistant Professor, Aichi University of Education
• 2009–2011: Postdoctoral Researcher, University of Tokyo
• 2006–2009: PhD student, Kyoto University

See also my old personal website