Improvement of acetone gas sensing performance of ZnO nanoparticles

Bian, Haiqin; Ma, Shenglin; Sun, Aimin; Xu, Xiaoli; Yang, Guijin; Yan, Shaohui; Gao, Jun; Zhang, Zhengmei; Zhu, Hongzheng

doi:10.1016/j.jallcom.2015.09.217

Cited by 60 publications

(20 citation statements)

References 33 publications

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“…Recently, nanosize ZnO materials have attracted a great deal of attentions due to their potential applications in optoelectronic devices, such as solar cells [1], gas sensors [2], light emitters [3] and photodetectors [4], and so on. These attractive applications have led to extensive studies of basic properties of ZnO nanostructures, especially understanding the roles of native defects which dominate the performance of ZnO [5].…”

Section: Introductionmentioning

confidence: 99%

Correlation between native defects and morphological, structural and optical properties of ZnO nanostructures

Lin

Liu

et al. 2017

Journal of Alloys and Compounds

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ZnO nanostructures are synthesized using chemical vapor deposition method. Well-distributed ZnO nanowires, nanogrenades and nanoislands are obtained by altering the temperature of joining the reactant gas O 2 from 550 to 570 and 600 ℃, respectively. The structural properties are derived from the X-ray diffraction patterns and Raman spectra. It is indicated that all the samples are c-oriented wurtzite ZnO. Photoluminescence spectra also indicate that ZnO nanogrenades present fewer native defects because of their lower relative intensities of visible to ultraviolet emissions (1.1) than that of ZnO nanowires (3.1) and nanoislands (1.9). The visible emission of photoluminescence spectrum is divided into green and yellow luminescence which are attributed to defects of oxygen vacancy and surface disorder, respectively. And it is found different proportions of oxygen vacancy and surface disorder of variform ZnO nanostructures.

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Section: Introductionmentioning

confidence: 99%

Correlation between native defects and morphological, structural and optical properties of ZnO nanostructures

Lin

Liu

et al. 2017

Journal of Alloys and Compounds

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“…Transfer of electrons from the conduction band reduces the free carrier density and causes the generation of the electron depletion region at the surface of the film, which in turn increases the resistance of the ZnO film [15]. After that, the ZnO thin film (an n-type metal oxide semiconductor) is exposed to VOC vapors (reducing vapors), the adsorbed vapor reacts with the chemisorbed oxygen anions on the film surface, and then oxygen ions release the trapped electrons back to the conduction band, which result in the decrease of sensor resistance.…”

Section: Omentioning

confidence: 99%

“…Details of published works on acetone gas sensitivity of the ZnO thin films prepared by various methods [3,8,15,[18][19][20][21] and the results of this research are given in Table 3. A comparison of the results shows many Fig.…”

Section: Omentioning

confidence: 99%

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

2017

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This research addresses a detailed study on the sensitivity and selectivity of ZnO thin film to volatile organic compound (VOC) vapors that can be used for the development of VOC sensors. The ZnO thin film of 100 nm thickness was prepared by post-annealing of e-beam evaporated Zn thin film. The sample was structurally, morphologically, and chemically characterized by X-ray diffraction and field emission scanning electron microscopy analyses. The sensitivity, selectivity, and detection limit of the sample were tested with respect to a wide range of common VOC vapors, including acetone, formaldehyde, acetic acid, formic acid, acetylene, toluene, benzene, ethanol, methanol, and isopropanol in the temperature range of 200-400°C. The results show that the best sensitivity and detection limit of the sample are related to acetone vapor in the studied temperature range. The ZnO thin film-based acetone sensor also shows a good reproducibility and stability at the operating temperature of 280°C.

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“…However, high operating temperatures are usually required in order to obtain highly sensitive ZnO sensors. In an effort to improve the sensing characteristics of the material, porous [10,11] or doped [12,13,14] ZnO, as well as ZnO microflowers [15], nanorods [16,17], nanoparticles [18,19], and quantum dots [20] have been employed recently as acetone sensors, among others.…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser deposition of ZnO thin films decorated with Au and Pd nanoparticles with enhanced acetone sensing performance

et al. 2017

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Improvement of acetone gas sensing performance of ZnO nanoparticles

Cited by 60 publications

References 33 publications

Correlation between native defects and morphological, structural and optical properties of ZnO nanostructures

Correlation between native defects and morphological, structural and optical properties of ZnO nanostructures

Investigation of sensitivity and selectivity of ZnO thin film to volatile organic compounds

Pulsed laser deposition of ZnO thin films decorated with Au and Pd nanoparticles with enhanced acetone sensing performance

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