Journal article
Colloidal deposition on remotely controlled charged micropatterned surfaces in a parallel-plate flow chamber
Langmuir, v 24(17), pp 9381-9385
02 Sep 2008
PMID: 18656970
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This article describes a method to influence colloid deposition by varying the zeta potential at microelectrodes with remotely applied electric potentials. Deposition experiments were conducted in a parallel-plate flow chamber for bulk substrates of glass, indium tin oxide (ITO), and ITO-coated glass microelectrodes in 10 and 60 mM potassium chloride solutions. Colloid deposition was found to be a function of solution chemistry and the small locally delivered electric surface potentials. Electric fields and physical surface heterogeneity can be ruled out as cause of the observed deposition. Results are reported using experimentally determined Sherwood numbers and compared to the predictions of a previously developed patch model. Minor deviations between predicted and experimental Sherwood numbers imply that physical and chemical interactions occur. Specifically, we propose that colloidal particles respond to local variations in surface potential through electrostatic interactions, altering particle streamlines flowing along the surface and ultimately the extent of deposition.
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Details
- Title
- Colloidal deposition on remotely controlled charged micropatterned surfaces in a parallel-plate flow chamber
- Creators
- Timothy R Kline - Azusa Pacific UniversityGexin Chen - Azusa Pacific UniversitySharon L Walker - Azusa Pacific University
- Publication Details
- Langmuir, v 24(17), pp 9381-9385
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000258722100036
- Scopus ID
- 2-s2.0-51449088949
- Other Identifier
- 991021230008504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary