Metalloporphyrins-modified carbon nanotubes networked films-based chemical sensors for enhanced gas sensitivity

M. Penza, R. Rossi, M. Alvisi, M.A. Signore, E. Serra, R. Paolesse, A. D'Amico, C. Di Natale

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Abstract

In this paper the effect of the surface functionalization of the carbon nanotubes (CNT) networked films with a metalloporphyrins layer is investigated for gas sensing. Modified film exhibits an increased sensitivity of the electrical resistance towards the concentrations of common volatile compounds (alcohols, amines, aromatic and ketones), at room temperature. Furthermore, a part of the adsorption properties of the functional units is transferred to the sensor signal and, as a consequence, the selectivity of the sensor is also modified. Principal Component Analysis (PCA) demonstrates that the functionalization provides enough selectivity change to turn a triplicate of the same CNT film into an effective sensor array capable of the compounds recognition. These findings are then promising for the development of arrays of CNT-based gas nanosensors with broad selectivities for fingerprinting analysis of complex samples. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)387 - 394
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume144
Issue number2
DOIs
Publication statusPublished - 17 Feb 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Penza, M., Rossi, R., Alvisi, M., Signore, M. A., Serra, E., Paolesse, R., D'Amico, A., & Di Natale, C. (2010). Metalloporphyrins-modified carbon nanotubes networked films-based chemical sensors for enhanced gas sensitivity. Sensors and Actuators, B: Chemical, 144(2), 387 - 394. https://doi.org/10.1016/j.snb.2008.12.060