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

Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels

1,†
, 2
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 and 1,4,*
Received: 13 December 2013; in revised form: 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)
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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.
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
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.

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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.

AMA Style

Crunaire S, Marcoux PR, 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(2):171-181.

Chicago/Turabian Style

Crunaire, Sabine; Marcoux, Pierre R.; Ngo, Khanh-Quyen; Moy, Jean-Pierre; Mallard, Frédéric; Tran-Thi, Thu-Hoa. 2014. "Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels." Chemosensors 2, no. 2: 171-181.

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