Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 133, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3506859
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Funding
- Natural Sciences and Engineering Council of Canada
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A pair of chemically powered self-propelled nanodimers can exist in a variety of bound and unbound states after undergoing a collision. In addition to independently moving unbound dimers, bound Brownian dimer pairs, whose center-of-mass exhibits diffusive motion, self-propelled moving dimer pairs with directed motion, and bound rotating dimer pairs, were observed. The bound pairs arise from a solvent depletion interaction, which depends on the nonequilibrium concentration field in the vicinity of dimers. The phase diagram reported in the paper shows regions in monomer interaction energy-diameter plane where these bound and unbound states are found. Particle-based simulations and analytical calculations are used to provide insight into the nature of interaction between dimers that gives rise to the observed bound states. (C) 2010 American Institute of Physics. [doi:10.1063/1.3506859]
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