Résultats de la recherche

Monitoring spatially heterogeneous dynamics in a drying colloidal thin film

Zakharov, Pavel ; Scheffold, Frank

In: Soft Materials, 2010, vol. 8, no. 2, p. 102-113

We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the superficial volume of a strongly scattering medium. By periodic modulation of an incident speckle beam we obtain pixel-wise ensemble averages of the...

OPEN IN
SONAR

Density dependent interactions and structure of charged colloidal dispersions in the weak screening regime

Rojas-Ochoa, Luis Fernando ; Castañeda-Priego, R. ; Lobaskin, V. ; Stradner, Anna ; Scheffold, Frank ; Schurtenberger, Peter

In: Physical Review Letters, 2008, vol. 100, p. 178304

We determine the structure of charge-stabilized colloidal suspensions at low ionic strength over an extended range of particle volume fractions using a combination of light and small angle neutron scattering experiments. The variation of the structure factor with concentration is analyzed within a one-component model of a colloidal suspension. We show that the observed structural behavior...

Affiner les résultats

Type de document

Institution

Collection spécifique

Langue

Auteur