Dynamic stabilization of Janus sphere trans-dimers
Joel N Johnson1, Amir Nourhani1,2,3, Robert Peralta1
1Department of Physics and Astronomy, Northern Arizona University, Flagstaff, Arizona 86011, USA.
Abstract:
We experimentally investigated the self-assembly of chemically active colloidal Janus spheres into dimers. The trans-dimer conformation, in which the two active sites are oriented roughly in opposite directions and the particles are osculated at their equators, becomes dominant as the hydrogen peroxide fuel concentration increases. Our observations suggest high spinning frequency combined with little translational motion is at least partially responsible for the stabilization of the trans-dimer as activity increases.
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