Direct Measurement of Three-Body Interactions amongst Charged Colloids

Matthias Brunner, Jure Dobnikar, Hans-Hennig von Grünberg, and Clemens Bechinger
Phys. Rev. Lett. 92, 078301 – Published 19 February 2004

Abstract

Three-body interactions amongst three charged colloidal particles are measured in a deionized aqueous solution. Two of the particles are confined to an optical line trap while the third one is approached by means of a focused laser beam. From the observed particle configurations we extract the three-body potential which is found to be attractive and roughly of the same magnitude and range as the pair interactions. In addition, numerical calculations are performed which show qualitative agreement with the experimental results.

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  • Received 7 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.078301

©2004 American Physical Society

Authors & Affiliations

Matthias Brunner, Jure Dobnikar, and Hans-Hennig von Grünberg

  • Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany

Clemens Bechinger

  • 2. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany

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Issue

Vol. 92, Iss. 7 — 20 February 2004

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