Acetic acid sensing of Mg-doped ZnO thin films fabricated by the sol–gel method
16 Jul 2018-Journal of Materials Science: Materials in Electronics (Springer US)-Vol. 29, Iss: 17, pp 14679-14688
TL;DR: In this article, a dip coated Mg-doped ZnO thin films were performed in temperature range of 150-400°C at different acetic acid vapor concentrations.
Abstract: Acetic acid vapor thin film gas sensor was developed by synthesizing Mg-doped ZnO nanoparticles using a low cost and facile sol–gel route and were characterized using field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and photoluminescence analysis. Morphological characterizations showed the formation of well-defined and highly crystalline ZnO nanoparticles on Si(100)/SiO2 substrate. Gas sensing characterization of dip coated Mg-doped ZnO thin films were performed in temperature range of 150–400 °C at different acetic acid vapor concentrations. At 300 °C, the sensitivity for pure ZnO, Zn0.98Mg0.02O and Zn0.94Mg0.06O samples at concentration of 200 ppm of acetic acid were 124, 78 and 67%, respectively. The highest sensitivity for Zn0.96Mg0.04O sample was 136% at the same vapor concentration and temperature. It showed a fast response time and recovery time (145 and 110 s, respectively).
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Cites background or methods from "Acetic acid sensing of Mg-doped ZnO..."
...Besides, Mg doping was widely investigated thanks to its controllable band gap, less lattice mismatch with ZnO and good crystallinity [30,31]....
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...Then they used it as active layer to detect Acetic acid vapor and it shows high sensitivity and fast response/recovery time [31]....
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...Based on previous studies, the improvement response of M3ZO sensor towards ethanol gas can be attributed to some factors like smallsized particle, higher surface roughness, stacking defects, amount of oxygen vacancies as well as band gap values [31,67]....
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References
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Journal Article•
28,685 citations
TL;DR: ZnO has received much attention over the past few years because it has a wide range of properties that depend on doping, including a range of conductivity from metallic to insulating (including n-type and p-type conductivity), high transparency, piezoelectricity, widebandgap semiconductivity, room-temperature ferromagnetism, and huge magneto-optic and chemical-sensing effects.
1,828 citations
Book•
01 Jan 2006
TL;DR: In this article, the basic properties and applications of ZnO (V.A. Coleman and C.C. Jagadish) were discussed. But the authors did not consider the application of ZNO in the medical field.
Abstract: Foreword 1. Basic Properties and Applications of ZnO (V.A. Coleman and C. Jagadish) 2. Doping and Defects in ZnO (D.C. Look) 3. Synthesis and Characterization of Nitrogen-Doped ZnO Films Grown by MOCVD (T.J. Coutts, Xiaonan Li, T. Barnes, B. Keyes, C.L. Perkins, S.E. Asher, Shengbai Zhang, Su-Huai Wei and S. Limpijumnong) 4. Pulsed Laser Deposition of ZnO (V. Gupta and K. Sreenivas) 5. Optical Properties of ZnO and Related Alloys (U. Ozgur and H. Morkoc) 6. Minority Carrier Transport in ZnO and Related Materials (O. Lopatiuk, A. Osinsky and L. Chernyak) 7. Contacts to ZnO (Jae-Hong Lim and Seong-Ju Park) 8. Ion Implantation into ZnO (S.O. Kucheyev and C. Jagadish) 9. Advances in Processing of ZnO (K. Ip, S.J. Pearton, D.P. Norton and F. Ren) 10. Novel Nanostructures and Nanodevices of ZnO (Zhong Lin Wang) 11. ZnO/ZnMgO heterojunction FETs (M. Yano, K. Koike, S. Sasa and M. Inoue) 12.ZnO Thin Film Transistors (R. Hoffman) 13. ZnO Piezoelectric Devices (Yicheng Lu, N. Emanetoglu and Ying Chen) 14. Gas, Chemical and Biological Sensing with ZnO (Young-Woo Heo, F. Ren and D.P. Norton) 15. ZnO-Based Light Emitters (A. Osinsky and S. Karpov) 16. Ferromagnetism in ZnO Doped With Transition Metal Ions (D.P. Norton, S.J. Pearton, J.M. Zavada, W.M. Chen and I.A. Bouyanova)
852 citations
TL;DR: In this article, the mean grain size and lattice distortion of ZnO gas sensors were calculated with the Cauchy-Cauchy and Debye-Scherrer methods, respectively.
Abstract: Nanometer ZnO gas sensing material with different particle size were made by chemical precipitation, emulsion and microemulsion, respectively. Crystal structure and ceramic microstructure of powders were determined by XRD and TEM. The mean grain size and lattice distortion of the materials were calculated with the Cauchy–Cauchy and Debye–Scherrer methods, respectively. Gas sensitivity of ZnO to H2, SF6, C4H10, gasoline, C2H5OH was measured. It can be shown from experimental results that grain size of ZnO gas-sensitive materials can be controlled by means of different processes or surfactants. The gas sensitivity of ZnO gas sensor depends upon its grain size.
694 citations
TL;DR: Various factors such as NO2 concentrations, annealing temperature, ZnO morphologies and particle sizes, relative humidity, operating temperatures which are affecting the NO2 gas sensing properties are discussed in this review.
Abstract: Because of the interesting and multifunctional properties, recently, ZnO nanostructures are considered as excellent material for fabrication of highly sensitive and selective gas sensors. Thus, ZnO nanomaterials are widely used to fabricate efficient gas sensors for the detection of various hazardous and toxic gases. The presented review article is focusing on the recent developments of NO2 gas sensors based on ZnO nanomaterials. The review presents the general introduction of some metal oxide nanomaterials for gas sensing application and finally focusing on the structure of ZnO and its gas sensing mechanisms. Basic gas sensing characteristics such as gas response, response time, recovery time, selectivity, detection limit, stability and recyclability, etc are also discussed in this article. Further, the utilization of various ZnO nanomaterials such as nanorods, nanowires, nano-micro flowers, quantum dots, thin films and nanosheets, etc for the fabrication of NO2 gas sensors are also presented. Moreover, various factors such as NO2 concentrations, annealing temperature, ZnO morphologies and particle sizes, relative humidity, operating temperatures which are affecting the NO2 gas sensing properties are discussed in this review. Finally, the review article is concluded and future directions are presented.
607 citations