Intrinsic sensing properties of the flower-like ZnO nanostructures

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Title:	Intrinsic sensing properties of the flower-like ZnO nanostructures
Authors:	劉炯權;Bai, Shouli;Guo, Teng;Li, Dianqing;Luo, Ruixian;Chen, Aifan;Liu, Chung Chiun
Contributors:	工學院材料科學與工程研究所
Keywords:	crystals;Flower-like ZnO nanostructures;Fourier transform infrared spectroscopy;Gas sensing;Langmuir–Hinshelwood reaction mechanism;methane;nanomaterials;Nitrogen dioxide;photoluminescence;scanning electron microscopy;solvents;surfactants;temperature;X-ray diffraction;X-ray photoelectron spectroscopy;zinc oxide
Date:	2013-04-29
Issue Date:	2026-04-23 11:37:31 (UTC+8)
Publisher:	Elsevier;Elsevier B.V
Abstract:	摘要： The flower-like ZnO nanostructures were successfully synthesized by a simple hydrothermal method without surfactant or organic solvent. The structure and morphology of the ZnO crystals were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). The sensing test results show that the ZnO based sensor exhibits high response to NO2 and high selectivity to CO and CH4, respectively, at lower operating temperature of 150°C. The intrinsic sensing characteristic results from native defects in ZnO crystals (i.e. nonstoichiometry) due to the relative content of donors is more than that of the acceptors, which have been confirmed by the X-ray photoelectron spectroscopy (XPS) and room temperature photoluminescence (PL) analysis. The transient responses for different gas concentrations were measured and modeled using Langmuir–Hinshelwood reaction mechanism. This work can give rise to interesting option for researching other metal oxides. 出版者： Elsevier B.V 出版日期： 2013-06-01 出處： Sensors and actuators. B, Chemical, 2013-06, Vol.182, p.747-754 版權： 2013 Elsevier B.V. 識別號： ISSN: 0925-4005 識別號： EISSN: 1873-3077 識別號： DOI: 10.1016/j.snb.2013.03.077
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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