Discriminating Bacteria With Functionalised Nanoporous Xerogels

S. Crunaire (1) , P.-R. Marcoux (2) , L.-H. Guillemot (1) , K.-Q. Ngo (1) , F. Mallard (2) , J.-P. Moy (2) , T.-H. Tran-Thi (1)

1 LFP - URA 2453 - Laboratoire Francis PERRIN
2 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

A new colorimetric and easy-to-use solid sensor for the detection of indole-producing bacteria is described. The sensor is a nanoporous matrix with tailored pores doped with a reactant, DMACA. The sensor turns rapidly from transparent to green-blue when exposed to metabolic indole coming from bacteria cultures, both in liquid and gas phases. An example of the discrimination between indole-positive (Eschericia coli) and indole-negative bacteria (Hafnia alvei), two important contaminants in food industry is given.

Mots clés: indole; bacteria detection; bacteria identification; microbial volatile organic compound; colorinetric sensor; xerogel; nanoporous materials; hybrid organic-inorganic; gas detection

Domaines: Chimie théorique et/ou physique

S. Crunaire, P.-R. Marcoux, L.-H. Guillemot, K.-Q. Ngo, F. Mallard, et al.. Discriminating Bacteria With Functionalised Nanoporous Xerogels. 2nd International Conference on Bio-Sensing Technology, Oct 2011, Amsterdam, Netherlands. pp.125-131, ⟨10.1016/j.proche.2012.10.138⟩. ⟨hal-00782216⟩