199 citations · 833 across the 38 of their papers we have counts for
7 papers · 1 filter
On a simple model that explains inversion of a self-propelled rotor under periodic stop and release operations
Yuki Koyano, Hiroyuki Kitahata, Satoshi Nakata +1
We propose a simple mathematical model that describes the time evolution of a self-propelled object on a liquid surface using such variables as the object location, the surface con…
Diffusion in crowded colloids of particles cyclically changing their shapes
Yuki Koyano, Hiroyuki Kitahata, Alexander S. Mikhailov
A simple model of an active colloid consisting of dumbbell-shaped particles that cyclically change their length without propelling themselves is proposed and analyzed. At nanoscale…
Bifurcation in the angular velocity of a circular disk propelled by symmetrically distributed camphor pills
Yuki Koyano, Hiroyuki Kitahata, Marian Gryciuk +4
We studied rotation of a disk propelled by a number of camphor pills symmetrically distributed at its edge. The disk was put on a water surface so that it could rotate around a ver…
Rotational motion of a camphor disk in a circular region
Yuki Koyano, Nobuhiko J. Suematsu, Hiroyuki Kitahata
In a two-dimensional axisymmetric system, a symmetric self-propelled particle exhibits rotational or oscillatory motion from the consideration of the system symmetry. In the presen…
Relationship between the size of camphor-driven rotor and its angular velocity
Yuki Koyano, Marian Gryciuk, Paulina Skrobanska +4
We consider a rotor made of two camphor disks glued below the ends of a plastic stripe. The disks are floating on a water surface and the plastic stripe does not touch the surface.…
Chemo-Sensitive Running Droplet
Yutaka Sumino, Masaharu Nagayama, Hiroyuki Kitahata +4
Chemical control of the spontaneous motion of a reactive oil droplet moving on a glass substrate under an aqueous phase is reported. Experimental results show that the self-motion…
Mode Selection in the Spontaneous Motion of an Alcohol Droplet
Ken Nagai, Yutaka Sumino, Hiroyuki Kitahata +1
An alcohol (pentanol) droplet exhibits spontaneous agitation on an aqueous solution, driven by a solutal Marangoni effect. We found that the droplet's mode of motion is controlled…