Search results for "Conductometric sensor"

showing 3 items of 3 documents

Electrochemical deposition of aniline derivatives for conductometric gas sensors

2019

International audience; Polymer film of poly(2,3,5,6-tetrafluoroaniline) (PTFA) were electroplated on ITO substrate from acidic medium by chronoamperometry. Electrochemical and morphological characterizations were performed and compared to polyaniline properties similarly coated. It seemed that PTFA film had an irreversible redox response with poor conductivity due to the absence of acid-base doping. This film were then incorporated in a patented device called MSDI heterojunction to perform ammonia sensing in humid atmosphere.

010302 applied physicschemistry.chemical_classificationMaterials scienceheterojunctionHeterojunction02 engineering and technologyPolymerConductivityChronoamperometry021001 nanoscience & nanotechnologyElectrochemistryammonia01 natural sciencespolyanilineconductometric sensorschemistry.chemical_compound[CHIM.POLY]Chemical Sciences/PolymersAnilineMonomerchemistryChemical engineering0103 physical sciencesPolyaniline[CHIM.OTHE]Chemical Sciences/Other0210 nano-technologyMaterials Today: Proceedings
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Bias and humidity effects on the ammonia sensing of perylene derivative/lutetium bisphthalocyanine MSDI heterojunctions

2016

International audience; In this paper, we prepared and studied sensors based on Molecular Semiconductor-Doped Insulator (MSDI) heterojunctions. These original devices are built with two stacked layers of molecular materials and exhibit very specific electrical and sensing properties. We studied the properties of a MSDI composed of the perylenetetracarboxylic dianhydride, PTCDA, or the fluorinated perylenebisimine derivative, C4F7-PTCDI, as n-type molecular material sublayers, and LuPc2 as a p-type semiconductor top layer. Their response to ammonia was compared to that of a resistor formed of only the top layer of the MSDI (LuPc2). Ammonia increases the current in the MSDIs whereas it causes…

MSDIAir quality monitoringAbsorption spectroscopyInorganic chemistryAnalytical chemistryConductometric sensor02 engineering and technology010402 general chemistrysensors[ CHIM ] Chemical Sciences01 natural sciencesLangmuir–Blodgett filmchemistry.chemical_compoundAmmoniaMaterials Chemistry[CHIM]Chemical SciencesRelative humiditygas sensitivitymolecular semiconductorsElectrical and Electronic EngineeringThin filmPerylenetetracarboxylic dianhydrideInstrumentationelectrical-propertiesabsorption-spectracomplexesbusiness.industryfield-effect transistorsMetals and AlloysHeterojunctionRelative humidity021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsphthalocyanineSemiconductorchemistryOrganic heterojunctionthin-filmslangmuir-blodgett0210 nano-technologybusinessPerylene
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From the solution processing of hydrophilic molecules to polymer-phthalocyanine hybrid materials for ammonia sensing in high humidity atmospheres.

2014

We have prepared different hybrid polymer-phthalocyanine materials by solution processing, starting from two sulfonated phthalocyanines, s-CoPc and CuTsPc, and polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), poly(acrylic acid-co-acrylamide) (PAA-AM), poly(diallyldimethylammonium chloride) (PDDA) and polyaniline (PANI) as polymers. We also studied the response to ammonia (NH3) of resistors prepared from these sensing materials. The solvent casted films, prepared from s-CoPc and PVP, PEG and PAA-AM, were highly insulating and very sensitive to the relative humidity (RH) variation. The incorporation of s-CoPc in PDDA by means of layer-by-layer (LBL) technique allowed to stabilize the fi…

Materials scienceIndolesPolymersEnvironmental Science and Managementlayer-by-layerInorganic chemistryPolyethylene glycolIsoindoleslcsh:Chemical technologyrelative humidityBiochemistryammoniaArticlepolyanilineAnalytical Chemistrychemistry.chemical_compoundsolution processing; polyaniline; phthalocyanine; hybrid material; layer-by-layer; ammonia; relative humidity; conductometric sensorPolyanilinemedicine[CHIM]Chemical Scienceslcsh:TP1-1185conductometric sensorElectrical and Electronic EngineeringInstrumentationchemistry.chemical_classificationAqueous solutionAniline CompoundsPolyvinylpyrrolidoneEcologyAtmosphereLayer by layerhybrid materialHumidityPolymerAtomic and Molecular Physics and OpticsSolutionsphthalocyaninechemistryPhthalocyaninesolution processingHybrid materialDistributed ComputingHydrophobic and Hydrophilic Interactionsmedicine.drug
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