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US 12,179,192 B2Granted
Acoustic tweezers
AssigneesCentre National De La Recherche Scientifique, Universite De Lille, Ecole Centrale De Lille, Sorbonne Universite
InventorsMichaël Aymeric Baudoin, Olivier Khalil Nizar Bou Matar-Lacaze, Antoine Jean-Pierre Riaud, Jean-Louis Pierre Thomas
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Abstract
Electroacoustic device having a transducer including a piezoelectric substrate, first and second electrodes of inverse polarity having respective first and second tracks provided on said substrate, the first and second tracks spiraling around a same center (C), the transducer being configured for generating a swirling ultrasonic surface wave in the substrate.
Claims15
A method for manipulating at least one object in a liquid medium, comprising:
- generating swirling surface acoustic waves with an electroacoustic device comprising a transducer, and
- propagating an acoustical vortex or a degenerated acoustical vortex induced by said surface acoustic waves into the liquid medium for creating therein a radiation pressure wherein said object is submitted, and manipulating the object through displacement of the transducer relative to the medium.
Dependencies are inferred from the claim text.