Zinc Oxide Nanostructure Thick Films as H<sub>2</sub>S Gas Sensors at Room Temperature

Abstract

The ZnO nanostructures have been synthesized and studied as the sensing element for the detection of H 2 S. The ZnO nanostructures were synthesized by hydrothermal method followed by sonication for different interval of time i.e. 30, 60, 90 and 120 min. By using screen printing method, thick films of synthesized ZnO nanostructure were deposited on glass substrate. Gas sensing properties of ZnO nanostructure thick films were studied for low concentration H 2 S gas at room temperature. The effects of morphology of synthesized ZnO nanostructure on gas sensing properties were studied and discussed. ZnO nanostructure synthesized by this method can be used as a promising material for semiconductor gas sensor to detect poisonous gas like H 2 S at room temperature with high sensitivity and selectivity.

Effect of the Microstructure of ZnO Thin Films Prepared by PLD on Their Performance as Toxic Gas Sensors

“…for MQ136. In the literature, studies on ZnO films exposed to H 2 S generally display response time values ranging from 50 s to 5 min [28][29][30]. These results indicate that our ZnO sensors have similar response times or better in the case of ZnO-C42, and therefore confirm the great potential of our ZnO thin film-based gas sensors.…”

Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films

“…All the samples exhibit hexagonal wurtzite structure of ZnO showing preferred orientations along (100), (002), and (101) [1,15,[21][22][23]. The peak along -axis, that is, (002) plane, occurs at 2 = 34.50, 34.54 ∘ , and 34.47 ∘ for samples Z1, Z1C1, and Z1C2, respectively.…”

Selective detection of diethanolamine utilizing an LMR/LSPR-based optical fiber sensor

“…27,28 SPR- and LSPR technique-based sensors that utilize both angular interrogation (prism) and spectral interrogation (optical fiber) are growing popular. 29–37…”

“…27,28 SPR-and LSPR technique-based sensors that utilize both angular interrogation ( prism) and spectral interrogation (optical fiber) are growing popular. [29][30][31][32][33][34][35][36][37] Nowadays, LMR-based optical fiber sensors are gaining acceptance due to their compact size, capability to deal with electromagnetic interference, low cost, and abundant scope for application in remote sensing and real-time monitoring. 38 In this technique, the waveguide mode is coupled with the coating modes to approach the resonance condition and excite the lossy modes in the core of the optical fiber probe.…”