| 초록 |
Self-propelling particles use energy from their environment for propulsion. Recently, there are intense research activities regarding the mechanism of motion and the interactions between particles and their environment. More interestingly, they potentially construct smart systems which make them to direct motions for performing specific tasks or functions. However, this development is still limited to horizontal movement and significant improvements are required. Hence, this presentation describes a new type of self-propelling particles moving vertically. The resulting buoyancy by bubble leads to elevate particles. The particles show rapid elevation, but once at the interface between liquid and air they start to sink. Consequently, an oscillatory trajectory is observed with a very homogenous frequency. Furthermore, the motion can also be controlled in the horizontal direction. These elevator particles could find interesting applications in wide range of fields such as decontamination, mixing, and separation. |
