Direct measurement of three-body interactions amongst charged colloids

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2004
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Brunner, Matthias
Dobnikar, Jure
von Grünberg, Hans-Hennig
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Physical Review Letters. 2004, 92(7), 078301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.92.078301
Zusammenfassung

Three-body interactions have been measured among three charged colloidal particles in deionized solvent. Two of the particles have been confined to an optical line-trap while the third one was approached by means of a focused laser beam. The experimentally determined three-body interactions are attractive and roughly of the same magnitude and range as the pair-interactions. In addition, numerical calculations have been performed, which show good agreement with the experimental results.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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ISO 690BRUNNER, Matthias, Jure DOBNIKAR, Hans-Hennig VON GRÜNBERG, Clemens BECHINGER, 2004. Direct measurement of three-body interactions amongst charged colloids. In: Physical Review Letters. 2004, 92(7), 078301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.92.078301
BibTex
@article{Brunner2004Direc-39430,
  year={2004},
  doi={10.1103/PhysRevLett.92.078301},
  title={Direct measurement of three-body interactions amongst charged colloids},
  number={7},
  volume={92},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Brunner, Matthias and Dobnikar, Jure and von Grünberg, Hans-Hennig and Bechinger, Clemens},
  note={Article Number: 078301}
}
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