Microscopic Engine Powered by Critical Demixing.


Journal article


Falko Schmidt, Alessandro Magazzù, Agnese Callegari, Luca Biancofiore, Frank Cichos, Giovanni Volpe
Physical Review Letters, vol. 120(6), 2018 Jan 9

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APA
Schmidt, F., Magazzù, A., Callegari, A., Biancofiore, L., Cichos, F., & Volpe, G. (2018). Microscopic Engine Powered by Critical Demixing. Physical Review Letters, 120(6).

Chicago/Turabian
Schmidt, Falko, Alessandro Magazzù, Agnese Callegari, Luca Biancofiore, Frank Cichos, and Giovanni Volpe. “Microscopic Engine Powered by Critical Demixing.” Physical Review Letters 120, no. 6 (January 9, 2018).

MLA
Schmidt, Falko, et al. “Microscopic Engine Powered by Critical Demixing.” Physical Review Letters, vol. 120, no. 6, Jan. 2018.


Abstract:
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.
An absorbing microparticle is trapped inside the focus of a laser beam. The induced temperature gradient in the vicinity of its surface induces local demixing that leads to continuous rotations around the center of the trapping beam.

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