| Title | Pt- and Pd-nanoclusters functionalized carbon nanotubes networked films for sub-ppm gas sensors |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2008 |
| Authors | Penza, Michele, Rossi R., Alvisi Marco, Cassano Gennaro, Signore M.A., Serra Emanuele, and Giorgi R. |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 135 |
| Pagination | 289-297 |
| ISSN | 09254005 |
| Keywords | carbon, Carbon films, Carbon nanotubes, Charge transfer, Chemical sensors, Chemiresistor, CNTs functionalizations, Electrical conductances, Electronic interfaces, Environmental monitoring, Functionalizations, Functionalized, Functionalized carbon nanotubes, Gas detections, Gas detectors, Gas exposures, Gas sensors, Gases, Ion exchange, Magnetron sputtering, Multiwalled carbon nanotubes (MWCN), Nanoclusters, Nanocomposites, Nanostructured materials, Nanostructures, Nanotubes, Operating temperatures, Palladium, Pd- and Pt-nanoclusters, Phase interfaces, Plasma deposition, Plasma enhanced chemical vapor deposition, Platinum, Radio frequency plasma enhanced chemical vapor depositions, Sensor electronic interface, Sensor signals, Sensors, Voltage outputs |
| Abstract | A gas chemiresistor, fabricated onto alumina using multi-walled carbon nanotubes (MWCNTs) networked films grown by radiofrequency plasma enhanced chemical vapor deposition (RF-PECVD) technology, is described for high-performance gas detection, at an operating temperature of 200 °C. Functionalizations of MWCNTs tangled bundle-films with nominally 5-nm thick Pt- and Pd-nanoclusters, prepared by magnetron sputtering, provide higher sensitivity for significantly enhanced gas detection of NO2, H2S, NH3, CO, up to a low limit of sub-ppm level. The measured electrical conductance of the functionalized MWCNTs upon gas exposures is modulated by charge transfer with p-type semiconducting characteristics. Pt- and Pd-nanoclusters functionalized MWCNTs gas sensors exhibited better performances compared to unfunctionalized MWCNTs, making them promising candidates for air-pollutants environmental monitoring. Simple electronic interface for the chemiresistor has been developed with a voltage output of the sensor signal. © 2008 Elsevier B.V. All rights reserved. |
| Notes | cited By 64 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-56049113970&doi=10.1016%2fj.snb.2008.08.024&partnerID=40&md5=b0431dc7e677e443b49e6f17232da131 |
| DOI | 10.1016/j.snb.2008.08.024 |
| Citation Key | Penza2008289 |
