NO2 sensing properties of 3D flower-like ZnO nanostructure decorated with thin porous petals synthesized using a simple sol–gel drop-casting method

A three-dimensional flower-like ZnO nanostructured film decorated with the thin porous ‘petals’ is synthesized using an inexpensive sol–gel drop-casting method, and the NO 2 detection characteristics of the nanostructured film are studied. The gas-sensing study shows higher sensitivity with selectiv...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2021, Vol.127 (1), Article 13
Main Authors: Mane, Sagar M., Nimbalkar, Amol R., Go, Ji Seong, Patil, Nilam B., Dhasade, Shankar S., Thombare, Jagannath V., Burungale, Arvind S., Shin, Jae Cheol
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Chemical synthesis
Condensed Matter Physics
Decoration
Gas sensors
Machines
Manufacturing
Materials science
Morphology
Nanostructure
Nanotechnology
Nitrogen dioxide
Operating temperature
Optical and Electronic Materials
Petals
Physics
Physics and Astronomy
Processes
Reproducibility
Selectivity
Sol-gel processes
Surfaces and Interfaces
Thin Films
Three dimensional flow
Zinc oxide
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Summary:A three-dimensional flower-like ZnO nanostructured film decorated with the thin porous ‘petals’ is synthesized using an inexpensive sol–gel drop-casting method, and the NO 2 detection characteristics of the nanostructured film are studied. The gas-sensing study shows higher sensitivity with selectivity toward NO 2 gas, exhibiting good reproducibility and stability. The as-synthesized nanostructured 3D flower-like ZnO film shows excellent NO 2 sensing performance, with a maximum gas response of 23.3 for 100 ppm NO 2 gas at an operating temperature of 180 °C. A detailed gas-sensing study reveals that the enormous porous petals with various inter-connected pores fused on the flower-like ZnO nanostructure improve the adsorption of gas molecules; consequently, the synthesized ZnO nanostructure exhibits a superior level of NO 2 gas-sensing activity. This study provides a promising path towards the development of a highly sensitive NO 2 gas sensor and an easy way to fabricate the 3D morphology decorated with exceedingly porous ‘petals’.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-020-04152-7