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Enhanced Bio-inspired Microsensor Based On Microfluidic / Bacteria / Love Wave Hybrid Structure For Continuous Control Of Heavy Metals Toxicity In Liquid Medium

hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
hal.structure.identifierLaboratoire de Biophysique [Monastir]
hal.structure.identifierInstitut National de Recherche et d'Analyse Physico-Chimique [INRAP]
dc.contributor.authorGAMMOUDI, Ibtissem
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorRAIMBAULT, Vincent
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorTARBAGUE, Hakim
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorMOROTÉ, Fabien
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorGRAUBY-HEYWANG, Christine
hal.structure.identifierLaboratoire de Biophysique [Monastir]
dc.contributor.authorOTHMANE, Ali
hal.structure.identifierInstitut National de Recherche et d'Analyse Physico-Chimique [INRAP]
dc.contributor.authorKALFAT, Rafik
hal.structure.identifierParasitologie/Médicaments [PPF]
dc.contributor.authorMOYNET, Daniel
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorREBIÈRE, Dominique
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorDEJOUS, Corinne
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorCOHEN-BOUHACINA, Touria
dc.date.created2013-10
dc.date.issued2014-07-31
dc.identifier.issn0925-4005
dc.description.abstractEnEnvironmental pollution by toxic heavy metals (HM) presents a real threat for aquatic medium and human health. Therefore aquatic ecosystem management requires early warning systems for on line monitoring. Microtechnologies can give rise to innovative bio-inspired hybrid microsensors, likely to meet this need and providing cost reductions by reducing reagents consumption and manufacturing cost.This work deals with a bacteria-based Love wave sensor, with enhanced properties provided by integration of a polydimethylsiloxane (PDMS) microfluidic network for a better control of the sample flow, and devoted to in situ monitoring of Cd(II) and Hg(II). Whole Escherichia coli (E. coli) bacteria are used as bioreceptor, mimicking in vivo enzymatic activity. They were immobilized on polyelectrolyte multilayer (PEM) films realized using layer by layer technique (LbL) with alternatively adsorption of positive and negative chains. The acoustic delay line was inserted into an electronic oscillation loop for real time monitoring.Compared to previous work, this paper deepens the results obtained with two types of microfluidic chips (measurements in static and dynamic modes), including analysis in terms of reproducibility. These results are analyzed and interpreted thoroughly leading to assumptions about the phenomena involved in the detection mechanisms. These hypotheses are validated through a pioneering study with atomic force microscopy (AFM), performed to characterize bacteria adhesion and to establish the relationship between bacteria morphological evolution and mechanical properties. AFM was chosen for its ability to maintain the bacteria alive during the experience without inducing irreversible damage.The resulting microsystem led to efficient HM detection, characterized by a reduced response-time (less than 60 s) and a detection limit inferior to 10−12 M. AFM measurements have demonstrated a high bacterial attachment and the stressing effect of toxic HM on bacterial morphological state. These results are consistent with those obtained from Love wave measurements.
dc.description.sponsorshipImmunocapteur à ondes de Love ultra-sensible pour la détection rapide de micro-organismes dans l'eau, visant la réalisation d'un dispositif d'alerte
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-nd/
dc.subject.enLayer by layer
dc.subject.enBacteria-biosensor
dc.subject.enMicrofluidics
dc.subject.enLove wave
dc.subject.enAFM
dc.subject.enHeavy metals
dc.title.enEnhanced Bio-inspired Microsensor Based On Microfluidic / Bacteria / Love Wave Hybrid Structure For Continuous Control Of Heavy Metals Toxicity In Liquid Medium
dc.typeArticle de revue
dc.identifier.doi10.1016/j.snb.2014.01.104
dc.subject.halSciences de l'ingénieur [physics]/Micro et nanotechnologies/Microélectronique
bordeaux.journalSensors and Actuators B: Chemical
bordeaux.page278-284
bordeaux.volume198
bordeaux.peerReviewedoui
hal.identifierhal-00937963
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00937963v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Sensors%20and%20Actuators%20B:%20Chemical&rft.date=2014-07-31&rft.volume=198&rft.spage=278-284&rft.epage=278-284&rft.eissn=0925-4005&rft.issn=0925-4005&rft.au=GAMMOUDI,%20Ibtissem&RAIMBAULT,%20Vincent&TARBAGUE,%20Hakim&MOROT%C3%89,%20Fabien&GRAUBY-HEYWANG,%20Christine&rft.genre=article


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