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Tuned sensing properties of metal-modified carbon-based nanostructures layers for gas microsensors

TitleTuned sensing properties of metal-modified carbon-based nanostructures layers for gas microsensors
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2012
AuthorsRossi, R., Alvisi Marco, Cassano Gennaro, Pentassuglia Rocco, Dimaio D., Suriano Domenico, Serra Emanuele, Piscopiello E., Pfister Valerio, and Penza Michele
JournalLecture Notes in Electrical Engineering
Volume109 LNEE
ISBN Number9781461409342
KeywordsAlumina, Alumina substrates, carbon, Carbon dioxide, Carbon nanomaterials, Carbon-based nanostructures, Chemical sensors, Chemiresistors, Cocatalyst, Different thickness, Electrical conductance, Fast response, Functionalized, Gas detection, Gas detectors, Gas micro sensors, Gas sensor devices, Gases, Microsystems, Nano-sized, Nanoclusters, Nanostructured materials, Nitrogen oxides, P-type, Platinum, Range detection, Sensing property, Sensor response, Short term stability

In this work, carbon nanomaterials have been prepared by CVD technology onto alumina substrates, coated by nanosized Co-catalyst at different thickness (2.5 nm and 7.5 nm) and used for a simple gas sensor device. The surface has been functionalized with sputtered Pt-nanocluster at a tuned loading of 8, 15 and 30 nm. The response of the chemiresistors in terms of p-type electrical conductance has been investigated as a function of the thickness of the Pt-nanoclusters towards different gases (NO 2, NH 3, CO, CH 4, CO 2). Furthermore, the effect of the temperature ranging from 20°C to 250°C on the sensor response has been addressed as well. Additionally, a short-term stability of the carbon nanomaterials based sensor towards NO 2 gas detection has been investigated for a 2-month period. The gas sensors based on Pt-modified carbon nanomaterials exhibit higher sensitivity compared to unmodified material, fast response, reversibility, repeatability, moderate drift of the baseline signal, sub-ppm range detection limit. © 2012 Springer Science+Business Media, LLC.


cited By 0; Conference of 16th Conference on Italian Association of Sensors and Microsystems, AISEM 2011 ; Conference Date: 7 February 2011 Through 9 February 2011; Conference Code:88105

Citation KeyRossi2012115