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Gas microsensors with metalloporphyrin-functionalized carbon nanotube networked layers

TitoloGas microsensors with metalloporphyrin-functionalized carbon nanotube networked layers
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2011
AutoriPenza, Michele, Rossi R., Alvisi Marco, Valerini D., Cassano Gennaro, Serra Emanuele, Paolesse R., Martinelli E., Di Natale C., and D'Amico A.
RivistaLecture Notes in Electrical Engineering
Volume91 LNEE
Paginazione105-111
ISBN Number9789400713239
ISSN18761100
Parole chiaveAlumina substrates, Carbon films, Carbon nanotubes, Catalytic effects, Central metals, Charge transfer, Chemical detection, Chemical vapor deposition, cobalt, Electric conductivity, electrical conductivity, Enhanced sensitivity, Fast response, Functionalized, Gas detectors, Gas micro sensors, Gas sensing applications, Gas sensing properties, Gas sensitivity, High sensitivity, Ion exchange, Manganese, Metalloporphyrins, Microsystems, Nitrogen oxides, P-type, Porphyrins, Range detection, Sensors, Spray coating, Tetraphenyl porphyrins, Zinc, Zinc coatings
Abstract

Networked carbon nanotubes (CNTs) films have been grown by chemical vapor deposition (CVD) technology onto miniaturized Co-coated alumina substrates for NO2 and NH3 gas sensing applications, at a sensor temperature of 150°C. The sidewalls of the CNTs films have been modified by spray-coating with two different metalloporphyrins (MPPs) consisting of a TetraPhenylPorphyrin coordinated by a central metal of zinc (Zn-TPP) and manganese (Mn-TPP) for enhanced sensitivity and tailored specificity. It was demonstrated that the gas sensitivity of the MPPs-modified CNTs-sensors significantly improved by a factor up to four-times through a catalytic effect of the MPPs. The gas sensing properties of CNTs-sensors, including MPPs-modified CNTs, are characterized by a change of the electrical conductivity in a model of charge transfer with a semiconducting p-type character. A response of the CNTs-sensor functionalized with 2 spray-layers of Mn-TPP has been measured as 0.43% to 0.5 ppm NO2, and as 0.09% to 10 ppm NH3, at 150°C. The MPPs-functionalized CNTs-sensors exhibit high sensitivity, fast response, reversibility, good repeatability, sub-ppm range detection limit. © 2011 Springer Science+Business Media B.V.

Note

cited By 0; Conference of 15th Italian Conference on Sensors and Microsystems, AISEM 2010 ; Conference Date: 8 February 2010 Through 10 February 2010; Conference Code:86311

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-80052351056&doi=10.1007%2f978-94-007-1324-6_15&partnerID=40&md5=09f2a03b46a8f8584b0008e019981616
DOI10.1007/978-94-007-1324-6_15
Citation KeyPenza2011105