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Chemosensors 2014, 2(2), 171-181; doi:10.3390/chemosensors2020171

Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels

1
CEA, DSM/IRAMIS/NIMBE /Laboratoire Francis Perrin, URA 2453, bât. 522, Gif-sur-Yvette F-91191, France
2
Department of Technology for Biology and Health, CEA-LETI-MINATEC, 17 avenue des Martyrs, Grenoble F-38054, France
3
SA, 5 rue des Berges, Grenoble F-38000, France
4
CNRS, DSM/IRAMIS/NIMBE, Laboratoire Francis Perrin, URA 2453, bât. 522, Gif-sur-Yvette F-91191, France
Current affiliation: École des Mines de DOUAI, Département Sciences de l’Atmosphère et Génie de l’Environnement, 941 Rue Charles BOURSEUL, CS 10838, Douai F-59508, France
*
Author to whom correspondence should be addressed.
Received: 13 December 2013 / Revised: 12 May 2014 / Accepted: 22 May 2014 / Published: 11 June 2014
(This article belongs to the Special Issue Photonic Sensors for Biological and Chemical Measurements)
View Full-Text   |   Download PDF [808 KB, 25 June 2014; original version 11 June 2014]   |  

Abstract

An innovative and low-cost method is proposed for the detection and discrimination of indole-positive pathogen bacteria. The method allows the non-invasive detection of gaseous indole, released by bacteria, with nanoporous colorimetric sensors. The innovation comes from the use of nanoporous matrices doped with 4-(dimethylamino)-cinnamaldehyde, which act as sponges to trap and concentrate the targeted analyte and turn from transparent to dark green, long before the colonies get visible with naked eyes. With such sensors, it was possible to discriminate E. coli from H. alvei, two indole-positive and negative bacteria after seven hours of incubation. View Full-Text
Keywords: Hybrid Materials; Silica; Nanoporous Materials; Biomedical Applications; Gas sensing; Direct Optical Transduction; Absorption spectroscopy Hybrid Materials; Silica; Nanoporous Materials; Biomedical Applications; Gas sensing; Direct Optical Transduction; Absorption spectroscopy
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MDPI and ACS Style

Crunaire, S.; Marcoux, P.R.; Ngo, K.-Q.; Moy, J.-P.; Mallard, F.; Tran-Thi, T.-H. Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels. Chemosensors 2014, 2, 171-181.

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