Metalloporphyrins-functionalized carbon nanotube networked films for room-temperature VOCs sensing applications

Michele Penza, Riccardo Rossi, Marco Alvisi, Daniele Valerini, Emanuele Serra, Roberto Paolesse, Eugenio Martinelli, Arnaldo D'Amico, Corrado Di Natale

Research output: Contribution to conferencePaper

15 Citations (Scopus)

Abstract

Networked films of carbon nanotubes (CNTs) have been grown by Chemical Vapor Deposition (CVD) technology onto cost-effective alumina substrate, coated by Cobalt nanocatalyst for growing the CNTs. The sidewalls of the CNTs films have been functionalized by spray-coating with two different metalloporphyrins (MPP), consisting of a Tetraphenylporphyrin coordinated by a central metal of zinc (Zn-TPP) and manganese (Mn-TPP). The surface-modification of the CNTs with layers of Zn-TPP and Mn-TPP provides enhanced sensitivity and broad selectivity to volatile organic compounds (VOCs). The chemical interactions of these MPP-modified CNTs films with different tested VOCs (alcohols, esters, aromatics, ketones) have been investigated using the miniaturized two-pole chemiresistors technique. The sensor response in terms of p-type electrical conductance in the MPP-modified CNTs-chemiresistors exhibits a good sensing performance, at room temperature. The findings show a VOC adsorption occuring by sensing characteristics of response-concentration relationships as a combined Langmuir-Henry behaviour. © 2009.
Original languageEnglish
DOIs
Publication statusPublished - Sep 2009
Externally publishedYes
EventEurosensors 23rd Conference - , Switzerland
Duration: 1 Sep 2009 → …

Conference

ConferenceEurosensors 23rd Conference
CountrySwitzerland
Period1/9/09 → …

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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