The effect of morphology and particle-wall interaction on colloidal near-wall dynamics
| Autor: | Yi Liu, Markus Retsch, Chiao-Peng Hsu, Pia Ruckdeschel, Peter R. Lang, Samuel Monter, Maciej Lisicki, J. Alejandro Rivera-Morán |
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| Rok vydání: | 2021 |
| Předmět: |
Range (particle radiation)
Materials science 02 engineering and technology General Chemistry Hard spheres Surface finish 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter::Soft Condensed Matter Dynamic light scattering Chemical physics 0103 physical sciences Surface roughness Brownian dynamics DLVO theory Particle ddc:530 010306 general physics 0210 nano-technology |
| Zdroj: | Soft Matter, 17 (45) Soft matter 17(45), 10301-10311 (2021). doi:10.1039/D1SM01191J |
| ISSN: | 1744-6848 1744-683X |
| DOI: | 10.1039/D1SM01191J |
| Popis: | 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. Soft Matter, 17 (45) ISSN:1744-683X ISSN:1744-6848 |
| Databáze: | OpenAIRE |
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