Sensing performances of ZnO nanostructures grown under different oxygen pressures to hydrogen

Journal Article · Sat Dec 15 04:00:00 EST 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.09.037· OSTI ID:22215691

Chu, Jin; Peng, Xiaoyan ^[1]; Wang, Zhenbo ^[2]; Feng, Peter ^[1]

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1. Department of Physics, University of Puerto Rico Rio Piedras, San Juan, 00936-8377 PR (United States)
2. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001 (China)

Graphical abstract: Display Omitted Highlights: ► Surface morphology depends on the oxygen pressure. ► Structural degradation was observed for the ZnO samples when oxygen pressure was overhigh. ► The sensitivity of the ZnO-based sensors increase with grown oxygen pressure. -- Abstract: For extensive use in an industrialized process of individual ZnO nanostructures applied in gas sensors, a simple, inexpensive, and safe synthesis process is required. Here, nanostructured ZnO films were grown by a pulsed laser deposition technique under different oxygen pressures. Scanning electron microscopy images show nanopores, nanotips, and nanoparticles are obtained and energy dispersive X-ray spectroscopy data indicate oxygen concentration of the synthesized samples increases monotonously with oxygen pressure. The sensor based on ZnO with high oxygen concentration has high sensitivity, rapid response (9 s) and recovery (80 s) behavior to 500 ppm hydrogen below 150 °C. Experimental data indicate that high oxygen concentration effectively improves the sensing properties of nanostructured ZnO.

• OSTI ID: 22215691
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ENERGY BEAM DEPOSITION
FILMS
HYDROGEN
LASER RADIATION
NANOSTRUCTURES
OXYGEN
PULSED IRRADIATION
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SENSITIVITY
SENSORS
SURFACES
SYNTHESIS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ZINC OXIDES