Published January 1, 2018
| Version v1
Journal article
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Microscopic Engine Powered by Critical Demixing
Creators
- 1. Bilkent Univ, Dept Mech Engn, TR-06800 Ankara, Turkey
- 2. Univ Leipzig, Fac Phys & Earth Sci, Peter Debye Inst Soft Matter Phys, D-04103 Leipzig, Germany
Description
We experimentally demonstrate a microscopic engine powered by the local reversible demixing of a critical mixture. We show that, when an absorbing microsphere is optically trapped by a focused laser beam in a subcritical mixture, it is set into rotation around the optical axis of the beam because of the emergence of diffusiophoretic propulsion. This behavior can be controlled by adjusting the optical power, the temperature, and the criticality of the mixture.
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