Spatial pattern and surface-specificity of particle and microorganism deposition and attachment: Modeling, analytic solution and experimental test
| Autor: | Mladen Jurić, Roi Bar-On, Christopher Schmetz, Viatcheslav Freger, Maria Bass, Aleksandr Leontev |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
010304 chemical physics Parallel-plate flow chamber Flow (psychology) 02 engineering and technology Substrate (electronics) Adhesion 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Contact force Biomaterials Kinetics Colloid and Surface Chemistry Flow conditions 0103 physical sciences Particle Deposition (phase transition) 0210 nano-technology Biological system |
| Zdroj: | Journal of Colloid and Interface Science. 584:45-56 |
| ISSN: | 0021-9797 |
| Popis: | Hypothesis: Understanding microparticle and living cell deposition and attachment on surfaces from a flow is a long-standing surface-science problem, pivotal to developing antifouling strategies. Recent studies indicate a complex non-conservative and surface-specific nature of adhesion and mechanical contact forces that determine attachment kinetics. This requires new models and kinetic data, however, observed deposition rates (e.g., in parallel-plate flow chamber, PPFC) represent a superposition of attachment and bulk transport. Here, we propose to deduce attachment rates (as an appropriate rate constant) from spatial deposition profiles along PPFC and develop an analytical solution for the full problem, suitable for deposition data analysis and parameter fitting. Experiments: Analytical solution, validated by numerical simulations, reveals relation between the deposition profile along PPFC and key model parameter B, the ratio of sedimentation and attachment rates. Its use is demonstrated on experimental data obtained in a PPFC for particles and bacteria on various surfaces. Findings: Fitted B values highlight correlation with the particle/substrate nature and consistently explain the observed trends along PPFC, both decreasing and increasing. Thus derived attachment rates will serve as basis for future microscopic modelling that would relate attachment to appropriate surface and contact-mechanical characteristics of particles and substrate and flow conditions. |
| Databáze: | OpenAIRE |
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