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Dynamic Adhesion Behavior of Micrometer-scale Particles Flowing Over Patchy Surfaces with Nanoscale Electrostatic Heterogeneity by Ranojoy D. Duffadar; Jeffrey M. Davis is a Chemistry article available to read on EtoBox.
What is Dynamic Adhesion Behavior of Micrometer-scale Particles Flowing Over Patchy Surfaces with Nanoscale Electrostatic Heterogeneity about?
The dynamic adhesion behavior of micrometer-scale silica particles is investigated numerically for a low Reynolds number shear flow over a planar collecting wall with randomly distributed electrostatic heterogeneity at the 10-nanometer scale. The hydrodynamic forces and torques on a particle are coupled to spatially varying colloidal interactions between the particle and wall. Contact and frictional forces are included in the force and torque balances to capture particle skipping, rolling, and arrest. These dynamic adhesion signatures are consistent with experimental results and are reminiscent of motion signatures observed in cell adhesion under flowing conditions, although for the synthetic system the particle-wall interactions are controlled by colloidal forces rather than physical bonds between cells and a functionalized surface. As the fraction of the surface (Theta) covered by the cationic patches is increased from zero, particle behavior sequentially transitions from no contact with the surface to skipping, rolling, and arrest, with the threshold patch density for adhesion (Theta(crit)) always greater than zero and in quantitative agreement with experimental results. The ion
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It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Ranojoy D. Duffadar; Jeffrey M. Davis
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)
- Published
- 2008
- Language
- EN
- Field
- Chemistry (Physical Sciences)