Bending stress induced improved chemiresistive gas sensing characteristics of flexible cobalt-phthalocyanine thin films
- 1 April 2013
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 102 (13) , 132107
Abstract
We report chemiresistive gas sensing characteristics of cobalt phthalocyanine films deposited on flexible bi-axially oriented polyethylene terephthalate substrates. Charge carrier mobility in these films systematically decreases upon bending, which implies that bending reduces π-π interactions among molecules. At room temperature, these films exhibited a reversible change in resistance on exposure to ammonia (5–50 ppm) along with high sensitivity and selectivity as well as fast response and recovery. The chemiresistive sensing properties were found to improve significantly under bend conditions owing to creation of more numbers of interaction sites.Keywords
This publication has 24 references indexed in Scilit:
- Ultrathin and lightweight organic solar cells with high flexibilityNature Communications, 2012
- Enhanced ammonia sensing performances of Pd-sensitized flowerlike ZnO nanostructureSensors and Actuators B: Chemical, 2011
- Flexible room-temperature NO2 gas sensors based on carbon nanotubes/reduced graphene hybrid filmsApplied Physics Letters, 2010
- Flexible chemiresistor sensors: thin film assemblies of nanoparticles on a polyethylene terephthalate substrateJournal of Materials Chemistry, 2009
- Flexible thick-film electrochemical sensors: Impact of mechanical bending and stress on the electrochemical behaviorSensors and Actuators B: Chemical, 2009
- Ammonia sensors and their applications—a reviewSensors and Actuators B: Chemical, 2005
- The path to ubiquitous and low-cost organic electronic appliances on plasticNature, 2004
- Fabrication and Characterization of Thin Films of Single-Walled Carbon Nanotube Bundles on Flexible Plastic SubstratesJournal of the American Chemical Society, 2004
- Flexible active-matrix displays and shift registers based on solution-processed organic transistorsNature Materials, 2004
- Influence of atmospheric pollutants on the conductance of phthalocyanine filmsSensors and Actuators B: Chemical, 1999