Synthesis of flower shaped ZnO thin films for resistive sensing of NO2 gas

A soft chemical synthetic method is used to obtain highly crystalline ZnO flower thin films. Hexagonal wurtzite ZnO structure is observed from X-ray diffraction studies. A large-area jasmine flower-shaped morphology of ZnO is uniformly maintained at all deposition temperatures. The films were charac...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2017-07, Vol.184 (7), p.2455-2463
Main Authors: Rane, Y. N., Shende, D. A., Raghuwanshi, M. G., Ghule, A. V., Patil, V. L., Patil, P. S., Gosavi, S. R., Deshpande, N. G.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Crystal structure
Deposition
Detection
Dispersion
Electrical resistivity
Electron microscopy
Emission analysis
Energy dispersive X ray spectroscopy
Field emission microscopy
Gas sensors
Jasmine
Lattice vacancies
Microengineering
Morphology
Nanochemistry
Nanotechnology
Nitrogen dioxide
Original Paper
Oxygen
Raman spectroscopy
Recovery time
Scanning electron microscopy
Spectroscopic analysis
Spectrum analysis
Thin films
Wurtzite
X-ray diffraction
X-ray spectroscopy
Zinc oxide
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Summary:A soft chemical synthetic method is used to obtain highly crystalline ZnO flower thin films. Hexagonal wurtzite ZnO structure is observed from X-ray diffraction studies. A large-area jasmine flower-shaped morphology of ZnO is uniformly maintained at all deposition temperatures. The films were characterized by energy dispersive X-ray spectroscopy, Raman spectroscopy and field emission scanning electron microscopy. Elemental analysis showed the presence of Zn and O elements without any other impurity. Raman spectroscopy spectroscopy in combination with elemental and resistivity analysis indicated wurtzite ZnO structure and the presence of oxygen vacancies. The films deposited at 338 K were studied with respect to their gas sensing capability at operating temperatures of 473 K. They show a fast response (65 s) and recovery time (54 s) for NO 2 gas at a concentration as low as 10 ppm. Graphical abstract Large area jasmine flower-shaped morphology of ZnO is uniformly maintained for all deposition temperatures using soft chemical synthesis. The maintained flower shaped ZnO thin films at all deposition temperatures is highly sensitive to NO 2 gas.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-017-2271-7