Publikation:

Shear modulus of two-dimensional colloidal crystals

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Wille_Shear Modulus.pdf
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Datum

2002

Autor:innen

Wille, Axel
Valmont, Franck
Zahn, Klaus

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URI (zitierfähiger Link)
http://nbn-resolving.de/urn:nbn:de:bsz:352-173563
DOI (zitierfähiger Link)
https://doi.org/10.1209/epl/i2002-00564-y
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Open Access-Veröffentlichung
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Physik: Publikationen
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Published

Erschienen in

Europhysics Letters (EPL). 2002, 57(2), pp. 219-225. ISSN 0295-5075. Available under: doi: 10.1209/epl/i2002-00564-y

Zusammenfassung

A new method for the determination of elastic constants of colloidal systems is described. We study super-paramagnetic microspheres confined by gravity to a two-dimensional layer at a water-air interface. Under an external vertical magnetic field the particles arrange in a crystalline triangular phase because of the repulsive dipole-dipole interaction. By use of an optical tweezer, one triangle formed by three spheres is rotated from its equilibrium position and the relaxation time measured using video-microscopy. We demonstrate that this time is directly related to the shear modulus μ of the crystal and study μ as a function of the magnetic particle interaction strength.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Elasticity, elastic constants, Colloids

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ISO 690WILLE, Axel, Franck VALMONT, Klaus ZAHN, Georg MARET, 2002. Shear modulus of two-dimensional colloidal crystals. In: Europhysics Letters (EPL). 2002, 57(2), pp. 219-225. ISSN 0295-5075. Available under: doi: 10.1209/epl/i2002-00564-y
BibTex
@article{Wille2002Shear-17356,
  year={2002},
  doi={10.1209/epl/i2002-00564-y},
  title={Shear modulus of two-dimensional colloidal crystals},
  number={2},
  volume={57},
  issn={0295-5075},
  journal={Europhysics Letters (EPL)},
  pages={219--225},
  author={Wille, Axel and Valmont, Franck and Zahn, Klaus and Maret, Georg}
}
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