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Synthesis, Characterisation of WO3 Nanofibers and their Application in Chemical Gas Sensing

Published online by Cambridge University Press:  01 February 2011

Silvia Piperno ,
Maurizio Passacantando ,
Luca Lozzi ,
Carlo Cantalini ,
Ratna A. Phani  and
Sandro Santucci
Silvia Piperno
Affiliation:
[email protected] of L'AquilaDepartment of PhysicsVia VetoioCoppito (AQ) ITALY I-67010Italy
Maurizio Passacantando
Affiliation:
[email protected], University of L'Aquila, Department of Physics, Via Vetoio, Coppito (AQ), ITALY, I-67010, Italy
Luca Lozzi
Affiliation:
[email protected], University of L'Aquila, Department of Physics, Via Vetoio, Coppito (AQ), ITALY, I-67010, Italy
Carlo Cantalini
Affiliation:
[email protected], University of L'Aquila, Department of Chemistry and Materials, Monteluco di Roio, L'Aquila, ITALY, I-67040, Italy
Ratna A. Phani
Affiliation:
[email protected], University of L'Aquila, Department of Physics, Via Vetoio, Coppito (AQ), ITALY, I-67010, Italy
Sandro Santucci
Affiliation:
[email protected], University of L'Aquila, Department of Physics, Via Vetoio, Coppito (AQ), ITALY, I-67010, Italy
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Abstract

WO3 nanofibers have been produced by a simple method as electrospinnig. This is a process by which polymer nanofibers (with submicron scale diameters) can be formed when a droplet of viscoelastic polymer solution is subjected to high voltage electrostatic field. Polymer PMMA and WCl6 solution mixtures were used as precursors. The nanofiber were characterized morphologically and chemically by XPS, SEM, and XRD measurements and it was found the formation of mixed WOx/PMMA nanowires at room temperature that evolve after annealing at 300°C towards pure WO3 nanofibers as evidenced by XPS measurements. After the characterization the nanofibers have been deposited on the sensor devices to check their gas sensing properties. They show a semiconductor-like behaviour when they are heated and wide variation of the electrical resistance when they are exposure to NO2 gas.

Keywords

nanoscalesensorx-ray photoelectron spectroscopy (XPS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 915: Symposium R – Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications , 2006 , 0915-R04-03
Copyright
Copyright © Materials Research Society 2006

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