UV-activated room temperature single-sheet ZnO gas sensor
- Author(s): Fanli Meng 1 ; Hanxiong Zheng 2 ; Yufeng Sun 2 ; Minqiang Li 3 ; Jinhuai Liu 3
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View affiliations
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Affiliations:
1:
College of Information Science and Engineering , Northeastern University , Shenyang 110819 , People's Republic of China ;
2: Department of Mechanical and Automotive Engineering , Anhui Polytechnic University , Wuhu 241000 , People's Republic of China ;
3: Nanomaterials and Environment Detection Laboratory , Institute of Intelligent Machines, Chinese Academy of Sciences , Hefei 230026 , People's Republic of China
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Affiliations:
1:
College of Information Science and Engineering , Northeastern University , Shenyang 110819 , People's Republic of China ;
- Source:
Volume 12, Issue 10,
October
2017,
p.
813 – 817
DOI: 10.1049/mnl.2017.0148 , Online ISSN 1750-0443
Room temperature sensor is a research hot for metal–oxide gas sensors. However, electron activation is a bottleneck to improve sensitivity for room temperature sensors. Here, an ultraviolet (UV)-activated gas sensor based on a single-sheet porous single-crystalline (PSC) zinc oxide (ZnO) sheet has been fabricated instead of heating activation, which works at room temperature. The PSC ZnO nanosheets were first prepared by a one-pot wet-chemical method. Then, the precursors were annealed for 2 h in air to obtain the PSC ZnO nanosheets. They were characterised by scanning electron microscopy, high-resolution transmission electron microscopy and UV–visible spectrum. Finally, the single-sheet ZnO gas sensors were fabricated by focused ion beam technology, which exhibited good responses to 1–300 ppm of ethanol. The single-sheet ZnO UV-activated sensing mechanism was also put forward to explain the excellent sensing property.
Inspec keywords: organic compounds; scanning electron microscopy; semiconductor growth; porous semiconductors; II-VI semiconductors; transmission electron microscopy; visible spectra; nanoporous materials; wide band gap semiconductors; zinc compounds; nanosensors; gas sensors; annealing; nanofabrication; ultraviolet spectra; focused ion beam technology
Other keywords: annealing; one-pot wet-chemical method; temperature 293 K to 298 K; focused ion beam technology; nanosheets; high-resolution transmission electron microscopy; UV-activated room temperature single-sheet ZnO gas sensor; ZnO; ethanol; single-sheet porous single-crystalline zinc oxide sheet; time 2 h; scanning electron microscopy; UV-visible spectrum
Subjects: Nanofabrication using crystal growth techniques; Powders and porous materials (engineering materials science); Nanometre-scale semiconductor fabrication technology; Low-dimensional structures: growth, structure and nonelectronic properties; Optical properties of II-VI and III-V semiconductors (thin films, low-dimensional and nanoscale structures); II-VI and III-V semiconductors; Annealing processes; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Chemical sensors; Microsensors and nanosensors; Visible and ultraviolet spectra of II-VI and III-V semiconductors; Structure of powders and porous materials; Annealing processes in semiconductor technology; Chemical sensors
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