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Sensors 2016, 16(4), 466; doi:10.3390/s16040466

Identification of a Large Pool of Microorganisms with an Array of Porphyrin Based Gas Sensors

Department of Radiation Oncology, University of Pennsylvania, 3400 Civic Center Blvd, Philadelphia, PA 19104, USA
Faculty of Medicine, University of Botswana, Private Bag, Gaborone 0022, Botswana
Botswana-University of Pennsylvania Partnership, P.O. Box AC 157 ACH, Gaborone 0022, Botswana
Department of Environmental Science, University of Botswana, Private Bag, Gaborone 0022, Botswana
Department of Electronic Engineering, University of Rome Tor Vergata, Via Politecnico 1, Roma 00133, Italy
Centro di Ricerca, Ospedale San Pietro Fatebenefratelli, Via Cassia 600, Roma 00189, Italy
Department of Chemical Science and Technology, University of Rome Tor Vergata, Via della Ricerca Scientifica, Roma 00133, Italy
Author to whom correspondence should be addressed.
Academic Editor: Carmen Horrillo Güemes
Received: 29 January 2016 / Revised: 18 March 2016 / Accepted: 28 March 2016 / Published: 1 April 2016
(This article belongs to the Special Issue E-noses: Sensors and Applications)
View Full-Text   |   Download PDF [306 KB, uploaded 7 April 2016]   |  


The association between volatile compounds (VCs) and microorganisms, as demonstrated by several studies, may offer the ground for a rapid identification of pathogens. To this regard, chemical sensors are a key enabling technology for the exploitation of this opportunity. In this study, we investigated the performance of an array of porphyrin-coated quartz microbalance gas sensors in the identification of a panel of 12 bacteria and fungi. The porphyrins were metal complexes and the free base of a functionalized tetraphenylporphyrin. Our results show that the sensor array distinguishes the VC patterns produced by microorganisms in vitro. Besides being individually identified, bacteria are also sorted into Gram-positive and Gram-negative. View Full-Text
Keywords: microorganisms; volatile compounds; porphyrins; quartz microbalance microorganisms; volatile compounds; porphyrins; quartz microbalance

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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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Zetola, N.M.; Modongo, C.; Matlhagela, K.; Sepako, E.; Matsiri, O.; Tamuhla, T.; Mbongwe, B.; Martinelli, E.; Sirugo, G.; Paolesse, R.; Di Natale, C. Identification of a Large Pool of Microorganisms with an Array of Porphyrin Based Gas Sensors. Sensors 2016, 16, 466.

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