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Tuned Sensing Properties of Metal-Modified Carbon-Based Nanostructures Layers for Gas Microsensors

  • R. Rossi
  • M. Alvisi
  • G. Cassano
  • R. Pentassuglia
  • D. Dimaio
  • D. Suriano
  • E. Serra
  • E. Piscopiello
  • V. Pfister
  • M. Penza
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 109)

Abstract

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 (NO2, NH3, CO, CH4, CO2). 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 NO2 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.

Keywords

Alumina Substrate Network Film Unmodified Material Moderate Drift Charge Transfer Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • R. Rossi
    • 1
  • M. Alvisi
    • 1
  • G. Cassano
    • 1
  • R. Pentassuglia
    • 1
  • D. Dimaio
    • 1
  • D. Suriano
    • 1
  • E. Serra
    • 1
  • E. Piscopiello
    • 1
  • V. Pfister
    • 1
  • M. Penza
    • 1
  1. 1.ENEA, Brindisi Technical Unit for Technologies of MaterialsBrindisiItaly

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