Tunable conjugated polymers for bacterial differentiation
2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 222, 839-848 p.Article in journal (Refereed) Published
A novel rapid method for bacterial differentiation is explored based on the specific adhesion pattern of bacterial strains to tunable polymer surfaces. Different types of counter ions were used to electrochemically fabricate dissimilar polypyrrole (PPy) films with diverse physicochemical properties such as hydrophobicity, thickness and roughness. These were then modulated into three different oxidation states in each case. The dissimilar sets of conducting polymers were exposed to five different bacterial strains, Deinococcus proteolyticus, Serratia marcescens, Pseudomonas fluorescens, Alcaligenes faecalis and Staphylococcus epidermidis. By analysis of the fluorescent microscope images, the number of bacterial cells adhered to each surface were evaluated. Generally, the number of cells of a particular bacterial strain that adhered varied when exposed to dissimilar polymer surfaces, due to the effects of the surface properties of the polymer on bacterial attachment. Similarly, the number of cells that adhered varied with different bacterial strains exposed to the same surface, reflecting the different surface properties of the bacteria. Principal component analysis showed that each strain of bacteria had its own specific adhesion pattern. Hence, they could be discriminated by this simple, label-free method based on tunable polymer arrays combined with pattern recognition. (C) 2015 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2016. Vol. 222, 839-848 p.
Conducting polymer; Polypyrrole; Rapid microbial detection; Bacterial adhesion; Pattern recognition; Principal component analysis (PCA)
Polymer Chemistry Textile, Rubber and Polymeric Materials
IdentifiersURN: urn:nbn:se:liu:diva-122780DOI: 10.1016/j.snb.2015.09.033ISI: 000363815800109OAI: oai:DiVA.org:liu-122780DiVA: diva2:873332
Funding Agencies|Iranian Ministry of Science, Research and Technology; Linkoping University; Swedish Research Council [VR-2014-3079]2015-11-232015-11-232015-12-16