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Effect of O-2 flow rate on the morphological and optical properties of ZnO nanocrystals
Tian, H. J.; Xu, J. B.; Tian, Y. J.; Wen, H.
2012
Conference Name2nd International Conference on Chemical Engineering and Advanced Materials (CEAM 2012)
Source PublicationADVANCES IN CHEMISTRY RESEARCH II, PTS 1-3 Book Series: Advanced Materials Research
Pages70-75
Conference DateJUL 13-15, 2012
Conference PlaceGuangzhou, PEOPLES R CHINA
PublisherTrans Tech Publications Ltd
AbstractThe morphological and optical properties of ZnO nanocrystals prepared by thermal evaporation of Zn powders were studied at both upstream and downstream under different O-2 flow rates. The morphological evolution was observed by scanning electron microscopy. With O-2 flow rates changing from 0.25 sccm to 1 sccm, the caps of the ZnO nanonails become bigger and the stems gradually disappear at upstream, and the diameters at the top of ZnO nanorods become thicker and the length become longer at downstream. Room temperature PL study shows that UV emission is relatively enhanced with increasing O-2 flow rates. Computational fluid dynamics simulation was performed, which indicates that the morphological evolution of the ZnO structures results from the competition between the axial growth and the radial growth based on different O-2 and Zn vapor partial pressure.
KeywordZno Nanocrystal Chemical Vapor Deposition Morphological Evolution Computational Fluid Dynamics Vapor-deposition Controlled Growth Nanostructures Photoluminescence Arrays Nanowires Films Temperature Transport
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Indexed ByCPCI
Language英语
Document Type会议论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11221
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
Tian, H. J.,Xu, J. B.,Tian, Y. J.,et al. Effect of O-2 flow rate on the morphological and optical properties of ZnO nanocrystals[C]:Trans Tech Publications Ltd,2012:70-75.
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