Shear Thinning and Local Melting of Colloidal Crystals

Dullens, Roel P. A.; Bechinger, Clemens

Shear Thinning and Local Melting of Colloidal Crystals

Dateien

Dullens_0-411559.pdfGröße: 390.63 KBDownloads: 286

Datum

2011

Autor:innen

Dullens, Roel P. A.

Bechinger, Clemens

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2011, 107(13), 138301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.107.138301

Zusammenfassung

Phenomena such as shear thinning and thickening, occurring when complex materials are exposed to external forces, are generally believed to be closely connected to changes in the microstructure. Here, we establish a direct and quantitative relation between shear thinning in a colloidal crystal and the surface area of the locally melted region by dragging a probe particle through the crystal using optical tweezing. We show that shear thinning originates from the nonlinear dependence of the locally melted surface area on the drag velocity. Our observations provide unprecedented quantitative evidence for the intimate relation between mechanical properties and underlying changes in microscopic structure.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

DULLENS, Roel P. A., Clemens BECHINGER, 2011. Shear Thinning and Local Melting of Colloidal Crystals. In: Physical Review Letters. 2011, 107(13), 138301. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.107.138301

BibTex

@article{Dullens2011-09-19Shear-39303,
  year={2011},
  doi={10.1103/PhysRevLett.107.138301},
  title={Shear Thinning and Local Melting of Colloidal Crystals},
  number={13},
  volume={107},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Dullens, Roel P. A. and Bechinger, Clemens},
  note={Article Number: 138301}
}

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