The Effect of Carbon Nanotube Dispersion on CO Gas Sensing Characteristics of Polyaniline Gas Sensor
| Autor: | Y. Wanna, Nakorn Srisukhumbowornchai, Nandh Thavarungkul, Anurat Wisitsoraat, Pisith Singjai, Adisorn Tuantranont |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Macromolecular Substances Surface Properties Transducers Molecular Conformation Biomedical Engineering chemistry.chemical_element Bioengineering Carbon nanotube Chemical vapor deposition Sensitivity and Specificity law.invention chemistry.chemical_compound law Materials Testing Polyaniline Electrochemistry Nanotechnology General Materials Science Gas detector Particle Size Composite material Conductive polymer Aniline Compounds Nanotubes Nanocomposite Argon Polyaniline nanofibers Reproducibility of Results Equipment Design General Chemistry Carbon Dioxide Condensed Matter Physics Equipment Failure Analysis chemistry Chemical engineering Gases Crystallization |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 6:3893-3896 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2006.675 |
| Popis: | Polyaniline is one of the most promising conducting polymers for gas sensing applications due to its relatively high stability and n or p type doping capability. However, the conventionally doped polyaniline still exhibits relatively high resistivity, which causes difficulty in gas sensing measurement. In this work, the effect of carbon nanotube (CNT) dispersion on CO gas sensing characteristics of polyaniline gas sensor is studied. The carbon nanotube was synthesized by Chemical Vapor Deposition (CVD) using acetylene and argon gases at 600 degrees C. The Maleic acid doped Emeradine based polyaniline was synthesized by chemical polymerization of aniline. CNT was then added and dispersed in the solution by ultrasonication and deposited on to interdigitated AI electrode by solvent casting. The sensors were tested for CO sensing at room temperature with CO concentrations in the range of 100-1000 ppm. It was found that the gas sensing characteristics of polyaniline based gas sensor were considerably improved with the inclusion of CNT in polyaniline. The sensitivity was increased and response/recovery times were reduced by more than the factor of 2. The results, therefore, suggest that the inclusion of CNT in MA-doped polyaniline is a promising method for achieving a conductive polymer gas sensor with good sensitivity, fast response, low-concentration detection and room-operating-temperature capability. |
| Databáze: | OpenAIRE |
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