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Controlled Attachment of Pseudomonas aeruginosa with Binary Colloidal Crystal-Based Topographies
Hitesh Pingle1, Peng-Yuan Wang1,2, Helmut Thissen3
1Department of Chemistry and Biotechnology, Swinburne University of Technology, Hawthorn, 3122, Australia.
Small (Weinheim an Der Bergstrasse, Germany)
|February 28, 2018
Summary
Surface topography, not just chemistry, significantly impacts bacterial attachment. Binary colloidal crystal patterns reduce Pseudomonas aeruginosa attachment, offering a strategy to delay biofilm formation.
Area of Science:
- Materials Science
- Surface Chemistry
- Microbiology
Background:
- Surface topography and chemistry influence bacterial adhesion.
- The combined effects of surface chemistry and topography on bacterial attachment are not fully understood.
Purpose of the Study:
- To investigate the interplay between surface chemistry and topography in bacterial attachment.
- To evaluate the efficacy of binary colloidal crystal (BCC) patterns in controlling Pseudomonas aeruginosa attachment.
Main Methods:
- Fabrication of BCC topographical patterns using silica and poly(methyl methacrylate) (PMMA) particles.
- Surface modification with allylamine plasma polymer (AAMpp) to isolate topography effects.
- Characterization of bacterial attachment using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and fluorescence microscopy.
Main Results:
- Bacteria attachment was delayed on both uncoated and AAMpp-coated BCCs compared to flat films.
- Pseudomonas aeruginosa preferentially attached to smaller particle regions within the BCC patterns.
- BCC patterns significantly reduced overall bacterial attachment levels.
Conclusions:
- A trade-off exists between surface chemistry and topography in modulating bacterial attachment.
- Exploiting topographical patterns can delay the onset of P. aeruginosa biofilm formation.
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