Orientation of irreversible adhesion of spherical particles on prolate spheroidal collectors
| Autor: | Darrell Velegol, Matthew Flamm, Joseph F. Jones, Dale J. Waters |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Quantitative Biology::Tissues and Organs Spheroid Rotational diffusion Adhesion Quantitative Biology::Cell Behavior Surfaces Coatings and Films Electronic Optical and Magnetic Materials Quantitative Biology::Subcellular Processes Biomaterials Colloid and Surface Chemistry Classical mechanics Orientation (geometry) Brownian dynamics Particle SPHERES Brownian motion |
| Zdroj: | Journal of Colloid and Interface Science. 299:696-702 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2006.02.052 |
| Popis: | When one sphere adheres to a second sphere, the location or orientation of the adhesion on the second sphere is seldom considered. However, when a sphere adheres to a prolate spheroid, the orientation of the adhesion is sometimes critical. We have performed Brownian dynamics simulations to predict the orientation of adhesion of a sphere on a prolate spheroid. When the spheroid has a high rotational diffusion coefficient, simulations show that the spherical particle adheres near the end of the spheroid. We tested our model experimentally for two systems: (1) oppositely-charged spherical and spheroidal colloids and (2) like-charged colloidal spheres and E. coli K-12 D21 bacteria. For the latter case, the spheres have previously been shown to adhere only to one end of the bacterium. Experiments in case (1) support the results of the simulations, while data from case (2) do not agree with predictions. Case (2) data reveal that the end-on adhesion of the spheres on the bacteria is not a purely Brownian phenomenon. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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