Journal ArticleDOI
Competitive influence of grain size and crystallinity on gas sensing performances of ZnO nanofibers
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TLDR
In this article, the effect of grain size and crystallinity on the gas sensing performance of ZnO nanofibers was investigated in terms of detection of CO. The results strongly suggest that simultaneous optimization of the size and the crystallinity of the grains is essential to maximize the sensing abilities of oxide nanofiber.Abstract:
In the present study, we investigated the effect of grain size and crystallinity on the gas sensing performances of ZnO nanofibers. The grain sizes in electrospun ZnO nanofibers ranged from 20 to 80 nm in diameter for different calcination temperatures. The sensing abilities of ZnO nanofibers with different grain sizes were investigated in terms of detection of CO. In addition to the size, the crystallinity of the grains in each nanofiber influenced its sensing performances synergistically. Two domains of influence, i.e., (1) the crystallinity dominant domain and (2) the grain size dominant domain, existed. In the crystallinity-dominant domain, in which lower calcination temperatures were used, the enhancement of crystallinity overcame the adverse effect of grain growth. In contrast, at higher calcination temperatures, the adverse effect of grain growth was intensified because the enhancement of crystallinity stagnated in the grain size-dominant domain. These results strongly suggest that the simultaneous optimization of the size and crystallinity of the grains is essential to maximize the sensing abilities of oxide nanofibers.read more
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Laser Irradiation of Metal Oxide Films and Nanostructures: Applications and Advances.
Haribabu Palneedi,Jung-Hwan Park,Deepam Maurya,Mahesh Peddigari,Geon-Tae Hwang,Venkateswarlu Annapureddy,Jong-Woo Kim,Jong Jin Choi,Byung Dong Hahn,Shashank Priya,Keon Jae Lee,Jungho Ryu +11 more
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Ordered porous metal oxide semiconductors for gas sensing
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Optimization and gas sensing mechanism of n-SnO2-p-Co3O4 composite nanofibers
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Excellent gas detection of ZnO nanofibers by loading with reduced graphene oxide nanosheets
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Excellent acetone sensor of La-doped ZnO nanofibers with unique bead-like structures
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References
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Journal ArticleDOI
Fabrication of Titania Nanofibers by Electrospinning
Dan Li,Younan Xia +1 more
TL;DR: In this paper, the authors describe a procedure based on electrospinning for generating nanofibers of anatase with controllable diameters and porous structures, which can be converted into anatase without changing their morphology via calcination in air at 500 °C.
Journal ArticleDOI
Chemical sensors based on nanostructured materials
Xing-Jiu Huang,Yang-Kyu Choi +1 more
TL;DR: A comprehensive review of current research activities that concentrate on chemical sensors based on nanotubes, nanorods, nanobelts, and nanowires can be found in this paper.
Journal ArticleDOI
Ultrasensitive chemiresistors based on electrospun TiO2 nanofibers.
TL;DR: TiO2 nanofiber sensors tested for NO2, in dry air, exhibited exceptional sensitivity showing with, for example, a 833% increase in sensor resistance when exposed to 500 ppb NO2 at 300 degrees C, consistent with a detection limit estimated to be well below 1 ppb.
Journal ArticleDOI
Functional nanofibers for environmental applications
TL;DR: In this paper, the opportunities and challenges of using functional nanofibers for several representative environmental applications are reviewed, including particulate separation and liquid filtration, in the context of multiple-jet electrospinning and electroblowing.
Journal ArticleDOI
Ultrasensitive and Highly Selective Gas Sensors Based on Electrospun SnO2 Nanofibers Modified by Pd Loading
TL;DR: In this article, a new route to suppress grain growth and tune the sensitivity and selectivity of nanocrystalline SnO2 fibers was presented, where the Pd-loaded sensors have 4 orders of magnitude higher resistivity and exhibit significantly enhanced sensitivity to H2 and lower sensitivity to NO2 compared to their unloaded counterparts.
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