1, Northern Arizona University, Flagstaff, Arizona, United States
In this talk, I will describe a system of catalytically self-propelled particles that self-assemble in a “contactless” manner (A. Nourhani, D. Brown, N. Pletzer, and J. G. Gibbs, Adv. Mater. (2017) – DOI: 10.1002/adma.201703910). By combining catalytic and magnetic properties, the particles are attracted to one another yet do not come into direct contact. Thus, the particles are seen to self-assemble into clusters that easily rearrange into various dynamic morphologies. New modes of motion arise in this system including predator-prey type chasing, as well as contactless cargo delivery. This system may prove to be a new paradigm for investigating collective behavior of active colloids.