MATHELIÉ-GUINLET, Marion; COHEN-BOUHACINA, Touria; GAMMOUDI, Ibtissem; MARTIN, Axel; BEVEN, Laure; DELVILLE, Marie-Hélène; GRAUBY-HEYWANG, Christine

doi:10.1016/j.snb.2019.03.144

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MATHELIÉ-GUINLET, Marion
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

COHEN-BOUHACINA, Touria
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

GAMMOUDI, Ibtissem
Laboratoire de l'intégration, du matériau au système [IMS]

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Sensors and Actuators B: Chemical. 2019, vol. 292, p. 314-320

Elsevier

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To face the emerging issues raised by bacterial infections in biomedical, food and environmental contexts, the combination of nanotechnologies and biosensors characteristics is increasingly seen as a promising tool to develop rapid, highly sensitive and specific devices for reliable bacterial detection and quantification. We present here the design of an electrochemical immuno-biosensor, integrating non cytotoxic silica nanoparticles (NPs), in a two-step spin coating process. Unlike biosensors that integrate a unique antibody-based layer without NPs, this new tool allows, through cyclic voltammetry measurements, the continuous and non-saturated detection of E. coli bacteria in only 5 min. and can reach up to 103 CFU/mL in 30 min. It offers great promises for industrial purposes as electrode functionalization is rather simple and its architecture can be tuned on demand to target a variety of micro-organisms, and the highlighted indicators (variations of current intensity, intensity ratios and/or difference of potentials) can easily be implemented in a screen displayed packaging.< Leer menos

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Nanoparticles

Immunosensor

Cyclic voltammetry

E. coli

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Silica nanoparticles-assisted electrochemical biosensor for the rapid, sensitive and specific detection of Escherichia coli

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