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Bacterial exploration of solid/liquid interfaces: developing platforms to control the physicochemical
Mathieu Letrou1, Kennedy Chagua Encarnacion2, Rebecca Mathias1
1CNRS, LIPhy, Université Grenoble Alpes, 38000, Grenoble, France.
The European Physical Journal. E, Soft Matter
|November 29, 2025
Summary
This study introduces a new microfluidic toolbox to precisely control bacterial environments on surfaces. This allows researchers to better understand how bacteria explore and colonize surfaces, impacting biofilm formation.
Area of Science:
- Microbiology
- Biophysics
- Surface Science
Background:
- Bacterial surface contamination is a significant issue in healthcare and industry.
- Early bacterial interactions at interfaces, including adhesion and motility, dictate colony development.
- Mechanisms of bacterial signal integration and behavioral modulation at interfaces are not well understood.
Purpose of the Study:
- To develop a novel microfluidic system for precise control and monitoring of bacterial surface interactions.
- To provide a versatile toolbox for interdisciplinary research on bacterial surface exploration.
- To investigate the surface motility of *Pseudomonas aeruginosa* in controlled microenvironments.
Main Methods:
- Design and fabrication of microfluidic flow cells with tunable physical and chemical interface properties.
- In situ monitoring of bacterial behavior at solid-liquid interfaces within the microfluidic system.
- Controlled manipulation of environmental parameters to study bacterial responses.
Main Results:
- Demonstration of a microfluidic toolbox enabling precise control over interfacial conditions.
- Successful in situ observation of bacterial surface exploration and motility.
- Methodology validated through the examination of *Pseudomonas aeruginosa* surface motility.
Conclusions:
- The developed microfluidic toolbox offers a powerful platform for studying bacterial surface colonization.
- This system facilitates a deeper understanding of the interplay between environmental cues and bacterial behavior at interfaces.
- Further research using this tool can elucidate mechanisms of biofilm formation and inform strategies for contamination control.
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