Critical Casimir interactions of colloids in micellar critical solutions

Helden, Laurent; Knippenberg, Timo; Tian, Li; Archambault, Aubin; Ginot, Félix; Bechinger, Clemens

Critical Casimir interactions of colloids in micellar critical solutions

Dateien

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Datum

2021

Autor:innen

Helden, Laurent

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Soft Matter. Royal Society of Chemistry (RSC). 2021, 17(10), pp. 2737-2741. ISSN 1744-683X. eISSN 1744-6848. Available under: doi: 10.1039/d0sm02021d

Zusammenfassung

We study the temperature-dependence of critical Casimir interactions in a critical micellar solution of the nonionic surfactant C₁₂E₅ dissolved in water. Experimentally, this is achieved with total internal reflection microscopy (TIRM) which measures the interaction between a single particle and a flat wall. For comparison, we also studied the pair interactions of a two dimensional layer of colloidal particles in the identical micellar system which yields good agreement with the TIRM results. Although, at the surfactant concentration considered here, the fluid forms a dynamical network of wormlike micelles whose structure is considerably more complex than that of simple critical molecular fluids, the temperature-dependence of the measured interactions is - for surface-to-surface distances above 160 nm - in excellent quantitative agreement with theory. Below 160 nm, deviations arise which we attribute to the adsorption of micelles to the interacting surfaces.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

HELDEN, Laurent, Timo KNIPPENBERG, Li TIAN, Aubin ARCHAMBAULT, Félix GINOT, Clemens BECHINGER, 2021. Critical Casimir interactions of colloids in micellar critical solutions. In: Soft Matter. Royal Society of Chemistry (RSC). 2021, 17(10), pp. 2737-2741. ISSN 1744-683X. eISSN 1744-6848. Available under: doi: 10.1039/d0sm02021d

BibTex

@article{Helden2021-03-18Criti-52787,
  year={2021},
  doi={10.1039/d0sm02021d},
  title={Critical Casimir interactions of colloids in micellar critical solutions},
  number={10},
  volume={17},
  issn={1744-683X},
  journal={Soft Matter},
  pages={2737--2741},
  author={Helden, Laurent and Knippenberg, Timo and Tian, Li and Archambault, Aubin and Ginot, Félix and Bechinger, Clemens}
}

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