Nanoparticle thin films for gas sensors prepared by matrix assisted pulsed laser evaporation.

Sensors
Anna Paola CaricatoRoberto Rella

Abstract

The matrix assisted pulsed laser evaporation (MAPLE) technique has been used for the deposition of metal dioxide (TiO(2), SnO(2)) nanoparticle thin films for gas sensor applications. For this purpose, colloidal metal dioxide nanoparticles were diluted in volatile solvents, the solution was frozen at the liquid nitrogen temperature and irradiated with a pulsed excimer laser. The dioxide nanoparticles were deposited on Si and Al(2)O(3) substrates. A rather uniform distribution of TiO(2) nanoparticles with an average size of about 10 nm and of SnO(2) nanoparticles with an average size of about 3 nm was obtained, as demonstrated by high resolution scanning electron microscopy (SEM-FEG) inspections. Gas-sensing devices based on the resistive transduction mechanism were fabricated by depositing the nanoparticle thin films onto suitable rough alumina substrates equipped with interdigitated electrical contacts and heating elements. Electrical characterization measurements were carried out in controlled environment. The results of the gas-sensing tests towards low concentrations of ethanol and acetone vapors are reported. Typical gas sensor parameters (gas responses, response/recovery time, sensitivity, and low detection limit) towards ...Continue Reading

References

Sep 16, 2004·Angewandte Chemie·Nicola PinnaMarkus Niederberger
Mar 19, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Michael B SigmanBrian A Korgel
Jun 23, 2006·Journal of Fluorescence·Paulo J G Coutinho, M Teresa C M Barbosa
Aug 19, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Eero KontturiJanne Laine

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Citations

Sep 27, 2012·Sensors·Xiao LiuHuansheng Ning
Aug 19, 2010·Angewandte Chemie·Antonio TricoliAlexandra Teleki
Jul 1, 2016·Nanoscale Research Letters·Olena M PerepelytsinaLuciano Rosario Maria Vicari
Jan 3, 2021·Clinica Chimica Acta; International Journal of Clinical Chemistry·Ting ChenQianming Chen

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Methods Mentioned

BETA
Scanning
X-ray
AFM

Software Mentioned

MAPLE

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