Journal ArticleDOI
Room temperature ferromagnetism and gas sensing in ZnO nanostructures: Influence of intrinsic defects and Mn, Co, Cu doping
Gugu H. Mhlongo,Katekani Shingange,Zamaswazi P. Tshabalala,Baban P. Dhonge,F. A. Mahmoud,Bonex W. Mwakikunga,David E. Motaung +6 more
TLDR
In this paper, a combination of defect structure analysis based on photoluminescence (PL) and electron paramagnetic resonance (EPR) was employed to detect coexisting oxygen vacancies (V O ) and zinc interstitials (Zn i ) defects in undoped and transition metal doped ZnO systems.About:
This article is published in Applied Surface Science.The article was published on 2016-12-30. It has received 115 citations till now. The article focuses on the topics: High-resolution transmission electron microscopy & Transition metal.read more
Citations
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Journal ArticleDOI
Room-temperature gas sensing of ZnO-based gas sensor: A review
TL;DR: In this paper, the room-temperature gas sensing properties of ZnO-based gas sensors are comprehensively reviewed, and more attention is particularly paid to the effective strategies that create room temperature gas sensing, mainly including surface modification, additive doping and light activation.
Journal ArticleDOI
Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature
Zhijie Li,Hao Li,Zhonglin Wu,Mingkui Wang,Jingting Luo,Hamdi Torun,PingAn Hu,Chang Yang,Marius Grundmann,Xiaoteng Liu,Yong Qing Fu,Yong Qing Fu +11 more
TL;DR: In this paper, the authors highlight the designs and mechanisms of different SMONs with various patterns (e.g., nanoparticles, nanowires, nanosheets, nanorods, nanotubes, nanofilms, etc.) for gas sensors to detect various hazardous gases at room temperature.
Journal ArticleDOI
Progress on Transition Metal-Doped ZnO Nanoparticles and Its Application
TL;DR: In this article, the authors used ZnO nanoparticles as a versatile material for doping of different transition metals among other materials, such as gold, cobalt, and cobalt.
Journal ArticleDOI
Low temperature ammonia gas sensor based on Mn-doped ZnO nanoparticle decorated microspheres
R. Sankar Ganesh,R. Sankar Ganesh,E. Durgadevi,M. Navaneethan,Vithoba L. Patil,S. Ponnusamy,Chellamuthu Muthamizhchelvan,Shinji Kawasaki,Pramod S. Patil,Yasuhiro Hayakawa +9 more
TL;DR: In this article, a low-temperature ammonia gas sensor using manganese-doped ZnO sphere as sensing material was successfully developed, which showed enhanced selectivity towards ammonia compared to other gases at low temperature.
Journal ArticleDOI
Design of supersensitive and selective ZnO-nanofiber-based sensors for H2 gas sensing by electron-beam irradiation
TL;DR: In this paper, ZnO nanofibers (NFs) were synthesized by the simple electrospinning technique for gas sensing studies, and they were irradiated with a high-energy (1 MeV) electron beam (e-beam) at different doses (50, 100, and 150 kGy) to study the effect of the e-beam dose on the sensing performance of the synthesized NNOs.
References
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Journal ArticleDOI
A comprehensive review of zno materials and devices
Ümit Özgür,Ya. I. Alivov,C. Liu,A. Teke,Michael A. Reshchikov,Seydi Doğan,Vitaliy Avrutin,Sang-Jun Cho,Hadis Morkoç +8 more
TL;DR: The semiconductor ZnO has gained substantial interest in the research community in part because of its large exciton binding energy (60meV) which could lead to lasing action based on exciton recombination even above room temperature.
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ZnO - nanostructures, defects, and devices
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.
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Blue Luminescence of ZnO Nanoparticles Based on Non‐Equilibrium Processes: Defect Origins and Emission Controls
TL;DR: In this article, high concentrations of defects are introduced into nanoscale ZnO through non-equilibrium processes and resultant blue emissions are comprehensively analyzed, focusing on defect origins and broad controls.
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Blue luminescent centers and microstructural evaluation by XPS and Raman in ZnO thin films annealed in vacuum, N2 and O2
TL;DR: In this paper, the defects of ZnO thin films prepared on sapphire substrates by employing a pulsed laser deposition (PLD) have been annealed in vacuum, N 2, and O 2 ambient at annealing temperature 600 ˚ C.
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X-ray peak broadening analysis in ZnO nanoparticles
TL;DR: In this article, the individual contributions of small crystallite sizes and lattice strain to the peak broadening in as-prepared and annealed ZnO nanoparticles were studied using Williamson-Hall (W-H) analysis.