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Polymers 2016, 8(10), 345; doi:10.3390/polym8100345

Influence of Polyelectrolyte Multilayer Properties on Bacterial Adhesion Capacity

1
Department of Chemistry, Faculty of Science, University of Zagreb, Zagreb 10000, Croatia
2
Faculty of Health Sciences, Ljubljana 1000, Slovenia
3
Jožef Stefan Institute, Ljubljana 1000, Slovenia
4
National Institute of Chemistry, Ljubljana 1000, Slovenia
5
Jožef Stefan International Postgraduate School, Ljubljana 1000, Slovenia
*
Author to whom correspondence should be addressed.
Academic Editor: Christine Wandrey
Received: 16 August 2016 / Revised: 11 September 2016 / Accepted: 14 September 2016 / Published: 26 September 2016
(This article belongs to the Collection Polyelectrolytes)
View Full-Text   |   Download PDF [8966 KB, uploaded 26 September 2016]   |  

Abstract

Bacterial adhesion can be controlled by different material surface properties, such as surface charge, on which we concentrate in our study. We use a silica surface on which poly(allylamine hydrochloride)/sodium poly(4-styrenesulfonate) (PAH/PSS) polyelectrolyte multilayers were formed. The corresponding surface roughness and hydrophobicity were determined by atomic force microscopy and tensiometry. The surface charge was examined by the zeta potential measurements of silica particles covered with polyelectrolyte multilayers, whereby ionic strength and polyelectrolyte concentrations significantly influenced the build-up process. For adhesion experiments, we used the bacterium Pseudomonas aeruginosa. The extent of adhered bacteria on the surface was determined by scanning electron microscopy. The results showed that the extent of adhered bacteria mostly depends on the type of terminating polyelectrolyte layer, since relatively low differences in surface roughness and hydrophobicity were obtained. In the case of polyelectrolyte multilayers terminating with a positively charged layer, bacterial adhesion was more pronounced than in the case when the polyelectrolyte layer was negatively charged. View Full-Text
Keywords: bacterial adhesion; Pseudomonas aeruginosa; polyelectrolyte multilayers; poly(allylamine hydrochloride); poly(4-styrenesulfonate); scanning electron microscopy; zeta potential bacterial adhesion; Pseudomonas aeruginosa; polyelectrolyte multilayers; poly(allylamine hydrochloride); poly(4-styrenesulfonate); scanning electron microscopy; zeta potential
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kovačević, D.; Pratnekar, R.; Godič Torkar, K.; Salopek, J.; Dražić, G.; Abram, A.; Bohinc, K. Influence of Polyelectrolyte Multilayer Properties on Bacterial Adhesion Capacity. Polymers 2016, 8, 345.

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