Enhancement of the gas sensing performance of carbon nanotube networked films based on their electrophoretic functionalization with gold nanoparticles

E. Dilonardo, M. Penza, M. Alvisi, C. Di Franco, D. Suriano, R. Rossi, F. Palmisano, L. Torsi, N. Cioffi

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Controlled amounts of colloidal Au nanoparticles (NPs), electrochemically presynthesized, were directly deposited on MWCNTs sensor devices by electrophoresis. Pristine and Au-functionalized MWCNT networked films were tested as active layers in resistive gas sensors for detection of pollutant gases. Au-modified CNT-chemiresistor demonstrated higher sensitivity to NO2 detecting up to sub-ppm level compared to pristine one. The investigation of the cross-sensitivity towards other pollutant gases revealed the decrease of the sensitivity to NO2 with the increase of Au content, and, on the other side, the increase of that to H2S; therefore the fine tune of the metal loading on CNTs has allowed to control not only the gas sensitivity but also the selectivity towards a specific gaseous analyte. Finally, the sensing properties of Audecorated CNT sensor seem to be promising in environmental and automotive gas sensing applications, based on low power consumption and moderate operating temperature.
Original languageEnglish
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event2015 MRS Spring Meeting - San Francisco, United States
Duration: 1 Jan 2015 → …

Conference

Conference2015 MRS Spring Meeting
CountryUnited States
CitySan Francisco
Period1/1/15 → …

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Dilonardo, E., Penza, M., Alvisi, M., Di Franco, C., Suriano, D., Rossi, R., ... Cioffi, N. (2015). Enhancement of the gas sensing performance of carbon nanotube networked films based on their electrophoretic functionalization with gold nanoparticles. Paper presented at 2015 MRS Spring Meeting, San Francisco, United States. https://doi.org/10.1S57/opl.2015.776