Thin polyaniline and polyaniline/carbon nanocomposite films for gas sensing

We have studied the gas sensing properties of five polyaniline-based materials—thick and thin PANI films, nanocomposite PANI/MWNT and PANI/SWNT films, and PANI nanogranules embedded in a polyvinylpyrrolidone matrix. The films (except for the latter) were deposited within the induction period of the...

Full description

Saved in:
Bibliographic Details
Published in:Thin solid films 2011-04, Vol.519 (12), p.4123-4127
Main Authors: Lobotka, P., Kunzo, P., Kovacova, E., Vavra, I., Krizanova, Z., Smatko, V., Stejskal, J., Konyushenko, E.N., Omastova, M., Spitalsky, Z., Micusik, M., Krupa, I.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotube
Cross-disciplinary physics: materials science
rheology
Ethyl alcohol
Exact sciences and technology
Gas sensor
Gas sensors
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Materials science
Multi wall carbon nanotubes
Nanocomposite
Nanocomposites
Nanocrystalline materials
Nanomaterials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotubes
Organic polymers
Physicochemistry of polymers
Physics
Polyaniline thin film
Polyanilines
Properties and characterization
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied the gas sensing properties of five polyaniline-based materials—thick and thin PANI films, nanocomposite PANI/MWNT and PANI/SWNT films, and PANI nanogranules embedded in a polyvinylpyrrolidone matrix. The films (except for the latter) were deposited within the induction period of the polymerization process on gold interdigitated micro electrodes. Their sensitivity to NH 3, H 2, ethanol, methanol, and acetone was measured. The thin PANI film (~ 100 nm thick) prepared by a lift-off process had the sensitivity to ammonia below 0.5 ppm, which was higher than that of nanocomposite films. Two materials—thick PANI film and nanocomposite PANI/MWNT film—exhibited a shallow minimum in the temperature dependence of resistance (at 313 K and 319 K), which is a feature exploitable in practical applications, since the gas sensors should be insensitive to small temperature fluctuations at these temperatures.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2011.01.177