Density-dependent pair interactions in 2D colloidal suspensions

Brunner, Matthias; Bechinger, Clemens; Strepp, Wolfram; Lobaskin, Vladimir; von Grünberg, Hans Hennig

Density-dependent pair interactions in 2D colloidal suspensions

Dateien

Brunner_0-413108.pdfGröße: 356.18 KBDownloads: 280

Datum

2002

Autor:innen

Brunner, Matthias

Bechinger, Clemens

Strepp, Wolfram

Lobaskin, Vladimir

von Grünberg, Hans Hennig

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Europhysics Letters (EPL). 2002, 58(6), pp. 926-965. ISSN 0295-5075. eISSN 1286-4854. Available under: doi: 10.1209/epl/i2002-00105-4

Zusammenfassung

We experimentally determine effective interparticle potentials in a two-dimensional (2D) colloidal system of charge-stabilized polystyrene particles at different particle densities ρ. Density variation is achieved by means of a scanned optical laser tweezer which serves to create a boundary box for the system. By changing the size of this boundary box, ρ can be systematically varied without having to prepare a new system. From the measured radial distribution functions we can then obtain the effective pair potentials of the particles. While for low particle densities perfect agreement with Yukawa-like potentials is observed, considerable deviations from this form are found at higher densities. We interpret this result as a many-body effect produced by macroion screening which is expected to become more pronounced as the density is increased.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BRUNNER, Matthias, Clemens BECHINGER, Wolfram STREPP, Vladimir LOBASKIN, Hans Hennig VON GRÜNBERG, 2002. Density-dependent pair interactions in 2D colloidal suspensions. In: Europhysics Letters (EPL). 2002, 58(6), pp. 926-965. ISSN 0295-5075. eISSN 1286-4854. Available under: doi: 10.1209/epl/i2002-00105-4

BibTex

@article{Brunner2002Densi-39436,
  year={2002},
  doi={10.1209/epl/i2002-00105-4},
  title={Density-dependent pair interactions in 2D colloidal suspensions},
  number={6},
  volume={58},
  issn={0295-5075},
  journal={Europhysics Letters (EPL)},
  pages={926--965},
  author={Brunner, Matthias and Bechinger, Clemens and Strepp, Wolfram and Lobaskin, Vladimir and von Grünberg, Hans Hennig}
}

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