TY  - JOUR
AU  - Rivera-Morán, J. Alejandro
AU  - Liu, Yi
AU  - Monter, Samuel
AU  - Hsu, Chiao-Peng
AU  - Ruckdeschel, Pia
AU  - Retsch, Markus
AU  - Lisicki, Maciej
AU  - Lang, Peter R.
TI  - The effect of morphology and particle–wall interaction on colloidal near-wall dynamics
JO  - Soft matter
VL  - 17
IS  - 45
SN  - 1744-6848
CY  - London
PB  - Royal Soc. of Chemistry
M1  - FZJ-2021-04055
SP  - 10301-10311
PY  - 2021
AB  - We investigated the near-wall Brownian dynamics of different types of colloidal particles with a typical size in the 100 nm range using evanescent wave dynamic light scattering (EWDLS). In detail we studied dilute suspensions of silica spheres and shells with a smooth surface and silica particles with controlled surface roughness. While the near wall dynamics of the particle with a smooth surface differ only slightly from the theoretical prediction for hard sphere colloids, the rough particles diffuse significantly slower. We analysed the experimental data by comparison with model calculations and suggest that the deviating dynamics of the rough particles are not due to increased hydrodynamic interaction with the wall. Rather, the particle roughness significantly changes their DLVO interaction with the wall, which in turn affects their diffusion.
LB  - PUB:(DE-HGF)16
C6  - pmid:34642726
UR  - <Go to ISI:>//WOS:000706650500001
DO  - DOI:10.1039/D1SM01191J
UR  - https://juser.fz-juelich.de/record/902125
ER  -