Mohamed Zuki, Fathiah and Edyvean, Robert G.J. and Pourzolfaghar, Hamed and Kasim, Norherdawati (2021) Modeling of the van der Waals forces during the adhesion of capsule-shaped bacteria to flat surfaces. Biomimetics, 6 (1). p. 5. ISSN 2313-7673, DOI https://doi.org/10.3390/biomimetics6010005.
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Abstract
A novel model is developed to evaluate the van der Waals (vdW) interactions between a capsule shaped bacterium (P. putida) and flat minerals plates in different approach profiles: Vertically and horizontally. A comparison of the approaches to the well-developed spherical particle to mineral surface (semi-infinite wall and spherical) approach has been made in this investigation. The van der Waals (vdW) interaction potentials for a capsule-shaped bacterium are found using Hamaker’s microscopic approach of sphere to plate and cylinder to plate either vertically or horizontally to the flat surface. The numerical results show that a horizontal orientated capsule shaped bacterium to mineral surface interaction was more attractive compared to a capsule shaped bacterium approaching vertically. The orientation of the bacterial approaching a surface as well as the type and topology of the mineral influence the adhesion of a bacteria to that surface. Furthermore, the density difference among each type of bacteria shape (capsule, cylinder, and sphere) require different amounts of energy to adhere to hematite and quartz surfaces. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya, Faculty Research Grant, under grant No. (GPF 028A-2019), No. (RF 006A-2018), and No. (PV047-2019) |
| Uncontrolled Keywords: | bacterial adhesion; capsule-shaped bacteria; pseudomonas putida; surface energy; van der Waals forces |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 21 Apr 2021 02:14 |
| Last Modified: | 21 Apr 2021 02:14 |
| URI: | http://eprints.um.edu.my/id/eprint/25876 |
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