Comparison of the electronic structures of Zn1-xCoxO and Zn1-xMgxO nanorods using x-ray absorption and scanning photoelectron microscopies

doi:10.1063/1.2240108

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/72705

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题名:	Comparison of the electronic structures of Zn_1-xCo_xO and Zn_1-xMg_xO nanorods using x-ray absorption and scanning photoelectron microscopies
作者:	Chiou, J. W.;Tsai, H. M.;Pao C. W.;Krishna Kumar, K. P.;Ray S. C.;Chien F. Z.;Pong W. F.;Tsai M. H.;Chen C. H.;Lin H. J.;Wu J. J.;Yang M. H.;Liu S. C.;Chiang H. H.;Chen C. W.
贡献者:	淡江大學物理學系
关键词:	Engineering main heading: Nanostructured materials
日期:	2006-07
上传时间:	2013-05-31 16:00:53 (UTC+8)
出版者:	Melville: A I P Publishing LLC
摘要:	X-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy (SPEM) measurements have been performed for Zn1-xCoxO and Zn1-xMgxO to elucidate the effects of the doping of Co and Mg, which have very different electronegativities, on the electronic structures of ZnO nanorods. The intensities of O K-edge near-edge features in the XANES spectra of Zn1-xCoxO and Zn1-xMgxO nanorods are found to be lower than those of ZnO, which suggests that both Co and Mg substitutions of the Zn ions enhance the effective charge on the O ion. The valence-band SPEM measurements show that Mg doping does not increase the density of near-Fermi-level states, which implies that Mg doping will not improve field emission of ZnO nanorods. It is surprising to find that both Co and Mg substitutions of Zn increase the numbers of O 2p dominated valence-band states, despite that Co and Mg have larger and smaller electronegativities than that of Zn. (c) 2006 American Institute of Physics.
關聯:	Applied Physics Letters 89(4), pp. 043121(3Pages)
DOI:	10.1063/1.2240108
显示于类别:	[物理學系暨研究所] 期刊論文

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