Synchronized motion of a mobile boundary driven by a camphor fragment

Macroscopic Self‐Propelled Objects

“…The slow asymmetrical dissolution of camphor31 (or, e.g., a liquid such as aniline oil32) leads to asymmetrical changes in the surface tension in the vicinity of the object, resulting in the propulsion of the object. When more than one object is employed, it is possible to observe intriguing movements as the changes in the surface tension propagate and affect the movement of other objects 33…”

Unidirectional motion of a camphor disk on water forced by interactions between surface camphor concentration and dynamically changing boundaries

“…The authors recall only two papers concerned with the interactions mediated by surface camphor concentrations that can dynamically change system boundaries, depending on the location of a camphor particle. 9,10 In the paper of Nakata et al 9 a disk was placed inside a small ring that could float on the water surface. The system was generalized in ref.…”

Autonomous movement in mixed metal based soft-oxometalates induced by CO2evolution and topological effects on their propulsion

“…14 This is because of the fact that the mechanism of motion of nanoscale objects differs from that of macro objects. 15,16 A macro particle can maintain its motion for a certain period of time even without continuous supply of energy but a nanoscale object cannot continue its motion due to the dominance of viscous drag. To control the motion of the nano objects a continuous driving force and an external stimulus are necessary.…”