Abstract
Copper oxide (CuO) nanoflowers were synthesized by a reproducible and inexpensive wet chemical method. The synthesized CuO nanoflowers were characterized by x-ray diffraction, Raman spectroscopy, x-ray photoelectron spectroscopy, field emission scanning electron microscopy and energy-dispersive spectroscopy. For an optimized operating temperature of 240°C, the sensor characteristics of the gas sensing device were measured using acetone as a volatile gas. The synthesized CuO nanoflower-based gas sensor responded very strongly for acetone gas concentrations in the range of 250–2250 ppm, and the recorded response for concentrations of 250 ppm and 2250 ppm was 2.7 and 7.2, respectively. The stability of the synthesized sensor was checked by repeating the measurements over a period of 1 month, and a very small change of 3.3% in the response of the sensor was observed.
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Acknowledgments
This work was supported by IIT Kharagpur, India. The XRD and SEM characterization was performed at CRF (Central Research Facility), IIT Kharagpur. XPS was measured in the DST FIST Facility of the Physics Department, IIT Kharagpur.
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Ganguly, S., Jha, R., Guha, P.K. et al. Synthesis of CuO Nanoflowers and Their Application Towards Inflammable Gas Sensing. J. Electron. Mater. 49, 5070–5076 (2020). https://doi.org/10.1007/s11664-020-08246-z
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DOI: https://doi.org/10.1007/s11664-020-08246-z