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- Title
Evaluation of IDE-based flexible thin film ZnO sensor for VOC sensing in a custom designed gas chamber at room temperature.
- Authors
Bhat, Pratima; Naveen Kumar, S. K.
- Abstract
We report the fabrication of Interdigitated Electrode-based thin film Zinc oxide sensor to study volatile organic compounds (VOCs) like 1-butanol, ethanol, acetone, xylene and toluene. The VOC sensing studies were carried out at 50 ppm level and results showed the highest relative response of 28.6% towards 1-butanol at RT (27 °C). Surface characterization of the ZnO structure using XRD, FESEM, EDAX and AFM is discussed which showed uniform hexagonal disc-like structure of ZnO, in hexagonal wurtzite phase of highly crystalline nature. UV–visible spectra showed a maximum absorbance at 360 nm and band gap energy of 3.03 eV (Tauc's plot). ZnO sensor showed good sensitivity for 1-butanol VOC and hence the sensor is tested towards 1-butanol in a custom designed, portable gas chamber with cost-effective instrumentation circuit. It is observed that the sensing results in gas chamber closely matched with that obtained through Keithley instrument. A cost-effective, portable, VOC sensing system can be realized.
- Subjects
GAS chambers; THIN films; ZINC oxide thin films; ZINC oxide films; ACETONE; CUSTOM design; SURFACE analysis
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 3, p1529
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-07664-x