MAJEE, Arghya; WÜRGER, Alois

doi:10.1103/PhysRevLett.108.118301

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MAJEE, Arghya
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

WÜRGER, Alois
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Physical Review Letters. 2012-05-04, vol. 108, n° 11, p. 118301

American Physical Society

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We propose a novel actuation mechanism for colloids, which is based on the Seebeck effect of the electrolyte solution: Laser heating of a nonionic particle accumulates in its vicinity a net charge Q, which is proportional to the excess temperature at the particle surface. The corresponding long-range thermoelectric field E∝1/r² provides a tool for controlled interactions with nearby beads or with additional molecular solutes. An external field E_{ext} drags the thermocharged particle at a velocity that depends on its size and absorption properties; the latter point could be particularly relevant for separating carbon nanotubes according to their electronic bandstructure.< Réduire

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Charging of heated colloidal particles using the electrolyte Seebeck effect

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