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Chemical vapor deposition preparation of nanostructured ZnO particles and their gas-sensing properties
Zhang, Dangwen1,2; Wu, Xiaofeng1; Han, Ning3; Chen, Yunfa1
2013-04-01
Source PublicationJOURNAL OF NANOPARTICLE RESEARCH
Volume15Issue:4Pages:1580
AbstractNanostructured ZnO materials including Zn@ ZnO core-shell structure (CS), ZnO hollow sphere (HS), and hierarchically structured ZnO hollow microsphere with nanorods (HSNR) grown on the outer surface were prepared by a simple and versatile chemical vapor deposition process. Scanning electron microscopy, X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy, and room temperature photoluminescence spectroscopy were used to characterize the morphology and crystalline structure of the samples. It was found that the gas-sensing property of the three structured ZnO had different responses in resistive mode using formaldehyde gas as the probe. In contrast with CS and HS samples, the HSNR exhibits better sensing property because it has more oxygen vacancies and more surface sites, which produce a higher resistance. However, the higher work function of Zn core than that of the ZnO sheath forms the ohmic contact, producing negative charge accumulating layers within ZnO side of Zn-ZnO junction, thus contributing a lower sensing response of CS model when exposed to the targeted formaldehyde gas.
KeywordZinc Oxide Chemical Vapor Deposition (Cvd) Hierarchical-structure Sensors
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
Language英语
WOS KeywordOPTICAL-PROPERTIES ; WORK FUNCTION ; ZINC-OXIDE ; HIERARCHICAL STRUCTURES ; RAMAN-SCATTERING ; SINGLE-CRYSTAL ; DOPED ZNO ; PHOTOLUMINESCENCE ; GROWTH ; NANOWIRES
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000318554400078
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13411
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Dangwen,Wu, Xiaofeng,Han, Ning,et al. Chemical vapor deposition preparation of nanostructured ZnO particles and their gas-sensing properties[J]. JOURNAL OF NANOPARTICLE RESEARCH,2013,15(4):1580.
APA Zhang, Dangwen,Wu, Xiaofeng,Han, Ning,&Chen, Yunfa.(2013).Chemical vapor deposition preparation of nanostructured ZnO particles and their gas-sensing properties.JOURNAL OF NANOPARTICLE RESEARCH,15(4),1580.
MLA Zhang, Dangwen,et al."Chemical vapor deposition preparation of nanostructured ZnO particles and their gas-sensing properties".JOURNAL OF NANOPARTICLE RESEARCH 15.4(2013):1580.
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