6533b853fe1ef96bd12ac142
RESEARCH PRODUCT
RFID passive gas sensor integrating carbon nanotubes
Cecilia OcchiuzziAmin RidaGaetano MarroccoManos M. Tentzerissubject
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)businessdescription
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 circuits, and articulated experimentations within a true RFID link, providing the proof of concept and some guidelines for tag design.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-01 |