Synthesis, characterization and DFT studies of zinc-doped copper oxide nanocrystals for gas sensing applications
By V. Crețu, V. Postica, A. Mishra, M. Hoppe, I. Tiginyanu, Yogendra Kumar Mishra, Lee Chow, N. H. Leeuw, Rainer Adelung, Oleg Lupan. 2016
159 citations recorded by the source corpus.
Due to their unique properties, p-type copper oxide nanostructures have demonstrated promising potential for various applications, especially for the detection of ethanol vapour and other volatile organic compounds (VOCs). In this work a simple and cost-effective synthesis from chemical solutions (SCS) at low temperatures (≤80 °C) and rapid thermal annealing (RTA) process were used to grow zinc-doped copper oxide (ZnxCu1−xOy) nanostructures. The structural, morphological, vibrational, chemical, electronic and sensorial characteristics of ZnxCu1−xOy nanocrystallite layers obtained by using such an efficient approach based on both, the SCS and RTA processes, have been studied. The investigations demonstrated the possibility to tune sensitivity from VOC to H2, as well as an improved response and high selectivity with respect to hydrogen gas for ZnxCu1−xOy nano-crystalline thin films with x = 0.03. Density functional theory calculations showed that the charge transfer together with changes in the Fermi level facilitate H2 gas sensing, which is further enhanced by Zn doping. Hydrogen gas sensing with a high response and selectivity using p-type hybrid semiconductor nanostructures has been reported. An improved stability in humid air was observed by exposure of doped samples to rapid thermal annealing process for the first time. The experimental and calculation results provide an alternative to sensitive and selective detection of ethanol and hydrogen gases, which would be of particular benefit in the area of public security, industrial and environmental applications.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/d1e19a144b114f6f7ad7425c36775f4a268ee425
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Citations in the corpus
- Studies of structural, optical, and electrical properties associated with defects in sodium-doped copper oxide (CuO/Na) nanostructures (2018, result): “The Raman spectra of CuO/Na nanoparticles confirms the presence of all the three characteristic Raman active modes of CuO [43] up to 3% Na doping, beyond that change in Raman spectra is observed which are in good agreement with previous report [46].”
- Gas Sensors Based on Copper Oxide Nanomaterials: A Review (2021, methodology): “) thermal oxidation 300 1–10 × [30] CuO/Cu2O nanocrystals (Zn doped) wet chemical/annealing 100–450 10–100 X [56] urchin-like CuO particles microwave-assisted 150–400 10–500 × [14] CuO nanoparticles inkjet printing 400 40–3000 × [39] CuO hollow spheres calcination of precursor 200–400 50–1000 × [107”