Search results for "Buckypaper"

showing 3 items of 3 documents

Multi-residue determination of organic micro-pollutants in river sediment by stir-disc solid phase extraction based on oxidized buckypaper

2020

This paper describes a procedure for the isolation of 20 organic micro-pollutants among pesticides, drugs, recreational drugs, flame retardants from river sediments. After a solid-liquid extraction with a methanol:water (50:50, v/v) solution, the supernatant was diluted with water and cleaned up by stir-disc solid-phase extraction (SPE). The disc was made of buckypaper, a self-supporting entangled assembly of carbon nanotubes, which was used as a highly porous, two-sided, sorbent membrane. In the preliminary activation step, the membrane was oxidised for 2-hours with nitric acid to extend its extraction capability also to more polar compounds. All extracts were analysed by ultra-high-perfor…

Chromatography Gasdisc-SPESorbentIllicit drugsCarbon nanotubesBuckypaper010402 general chemistryMass spectrometry01 natural sciencesBiochemistrysample preparation disc-SPE organic micro-pollutantsAnalytical Chemistrychemistry.chemical_compoundRiversNitric acidSolid phase extractionOrganic ChemicalsPesticidesSolid phase extractionorganic micro-pollutantsChromatographysample preparationNanotubes CarbonChemistry010401 analytical chemistryOrganic ChemistryExtraction (chemistry)Reproducibility of ResultsSedimentGeneral Medicine0104 chemical sciencesOrganic micro-pollutantsSpainSedimentMethanolOxidation-ReductionWater Pollutants Chemical
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CNT-based RFID passive gas sensor

2011

Summary form only given, as follows. Single-wall carbon nanotube (CNT) is examined for the design of a passive and maintenance-free wireless RFID sensor. CNT buckypaper is characterized from a dielectric and a sensitivity point of view, using an indirect way, by using antenna measurement and simulations in a controlled medium. A CNT-based prototype RFID tag is then described as the featured maintenance free sensor and experimentally verified for its applicability and sensitivity towards NH3.

Materials sciencebusiness.industryrfid sensorAntenna measurementSettore ING-INF/02 - Campi ElettromagneticiBuckypaperHardware_PERFORMANCEANDRELIABILITYDielectricCarbon nanotubelaw.inventionNanosensorlawHardware_INTEGRATEDCIRCUITSElectronic engineeringWirelessSensitivity (control systems)businessWireless sensor networkHardware_LOGICDESIGN2011 IEEE MTT-S International Microwave Symposium
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RFID passive gas sensor integrating carbon nanotubes

2011

Carbon nanotube (CNT) composites are sensitive to the presence of gases due to their high surface-to-volume ratio and hollow structure that are well suited for gas molecule absorption and storage. Such sensing capability is here integrated with UHF RF identification (RFID) technology to achieve passive and low-cost sensors, remotely readable. CNT film (buckypaper) is used as a localized variable resistive load integrated into a tag antenna, which becomes able to transduce the presence of hazardous gas in the environment, ammonia in this case, into a change of its electromagnetic features. The dynamic range and the hysteresis of the radio sensor are investigated by simulations, equivalent ci…

RadiationMaterials scienceDynamic rangebusiness.industryElectrical engineeringBuckypaperSettore ING-INF/02 - Campi ElettromagneticiCarbon nanotubeCondensed Matter Physicslaw.inventionUltra high frequencylawProof of conceptRFID sensor antennaEquivalent circuitElectrical and Electronic EngineeringAntenna (radio)Absorption (electromagnetic radiation)business
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