Direct measurement of the electrostatic image force of a levitated charged nanoparticle close to a surface
Direct measurement of the electrostatic image force of a levitated charged nanoparticle close to a surface
We report on optical levitation experiments to probe the interaction of a nanoparticle with a surface in vacuum. The observed interaction-induced effect is a controllable anharmonicity of the particle trapping potential. We reconstruct the Coulomb image charge interaction potential to be in perfect agreement with the experimental data for a particle carrying Q=-(11±1)e elementary charges and compare the measured electrostatic interaction with the weaker dispersive forces from theory. Our experimental results may open the route for a new surface sensitive scanning probe technique based on the high mechanical sensitivity of levitated nanoparticles.
Winstone, George
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Bennett, Robert
7f2a031b-5d4c-4112-a451-440c9460e169
Rademacher, Markus
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Rashid, Muddassar
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Buhmann, Stefan
77839719-56bf-48c1-869f-4313c2ec0f46
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
November 2018
Winstone, George
a2280720-4c80-43d7-97d0-85666ee4a1e5
Bennett, Robert
7f2a031b-5d4c-4112-a451-440c9460e169
Rademacher, Markus
5dfd9bd3-3e76-4e94-96a8-71a79a7814f3
Rashid, Muddassar
2d80257f-bf01-4710-8752-6b50165b747b
Buhmann, Stefan
77839719-56bf-48c1-869f-4313c2ec0f46
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Winstone, George, Bennett, Robert, Rademacher, Markus, Rashid, Muddassar, Buhmann, Stefan and Ulbricht, Hendrik
(2018)
Direct measurement of the electrostatic image force of a levitated charged nanoparticle close to a surface.
Physical Review A, 98 (5), [053831].
(doi:10.1103/PhysRevA.98.053831).
Abstract
We report on optical levitation experiments to probe the interaction of a nanoparticle with a surface in vacuum. The observed interaction-induced effect is a controllable anharmonicity of the particle trapping potential. We reconstruct the Coulomb image charge interaction potential to be in perfect agreement with the experimental data for a particle carrying Q=-(11±1)e elementary charges and compare the measured electrostatic interaction with the weaker dispersive forces from theory. Our experimental results may open the route for a new surface sensitive scanning probe technique based on the high mechanical sensitivity of levitated nanoparticles.
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e-pub ahead of print date: 19 November 2018
Published date: November 2018
Identifiers
Local EPrints ID: 428420
URI: http://eprints.soton.ac.uk/id/eprint/428420
ISSN: 2469-9926
PURE UUID: e2eac7e5-eee4-443a-a10a-98fe2adb575b
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Date deposited: 22 Feb 2019 17:31
Last modified: 18 Mar 2024 03:10
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Contributors
Author:
George Winstone
Author:
Robert Bennett
Author:
Markus Rademacher
Author:
Muddassar Rashid
Author:
Stefan Buhmann
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