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Comparison of performances of flexible sensors on foil and paper for efficient bacterial concentration measurement

Tijana Kojic (Department for Power, Electronics and Telecommunication, University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia)
Milan Radovanovic (Department for Power, Electronics and Telecommunication, University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia)
Goran M. Stojanovic (Department for Power, Electronics and Telecommunication, University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia)
Bojana Pivas (Faculty of Medicine, University of Novi, Novi Sad, Serbia)
Deana Medic (Faculty of Medicine, University of Novi Sad, Institute of Public Health of Vojvodina, Novi Sad, Serbia)
Hani Al-Salami (Biotechnology and Drug Development Research Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, Australia)

Sensor Review

ISSN: 0260-2288

Article publication date: 10 February 2020

Issue publication date: 20 January 2020

171

Abstract

Purpose

The purpose of this study was to develop flexible sensors for detection of different concentrations of bacteria, such as Pseudomonas aeruginosa and Staphylococcus aureus, in saline.

Design/methodology/approach

The sensors were fabricated using ink-jet printing technology and they consist of a pair of silver interdigitated electrodes printed on mechanically flexible substrates – foil and paper. In house measurement setup for testing and characterization of sensors has been developed. Structural, electrical and mechanical properties of flexible sensors have been determined and compared.

Findings

The characteristics of sensor – the resonant frequency as a function of different concentrations of each bacteria – are presented. The obtained results demonstrate different resonant frequencies for each dilution of Pseudomonas aeruginosa and Staphylococcus aureus in physiological saline.

Research limitations/implications

Both sensors showed accurate measurements of bacterial count, which can be achieved with detection of resonant frequency, and this is reflective of the number of bacterial cells within a sample.

Practical implications

The findings suggest that the newly developed method based on measuring resonant frequency corresponds well with bacterial cell count, thus establishing a new proof-of-concept that such method can have significant applications in bacterial cell counting that are economic and easily maintained.

Social implications

Fast, cost-effective, accurate and non-invasive method for detection of different bacteria from saline was developed.

Originality/value

For the first time, comparison between performances of flexible sensors on foil and paper for bacteria detection is demonstrated. Almost linear dependence between shift of resonant frequency of developed sensors and concentration of bacteria has been obtained.

Keywords

Acknowledgements

This study received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 690876 as well as partly by the projects TR32016 and 114-451-2506/2017.

Citation

Kojic, T., Radovanovic, M., Stojanovic, G.M., Pivas, B., Medic, D. and Al-Salami, H. (2020), "Comparison of performances of flexible sensors on foil and paper for efficient bacterial concentration measurement", Sensor Review, Vol. 40 No. 1, pp. 1-7. https://doi.org/10.1108/SR-04-2018-0082

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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