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

J. W. Chiou; H. M. Tsai; C. W. Pao; K. P. Krishna Kumar; S. C. Ray; F. Z. Chien; W. F. Pong; M. H. Tsai; C. H. Chen; H. J. Lin; J. J. Wu; M. H. Yang; S. C. Liu; H. H. Chiang; C. W. Chen

doi:10.1063/1.2240108

Comparison of the electronic structures of Zn_1-xCo_xO and Zn_1-xMg_xO nanorods using x-ray absorption and scanning photoelectron microscopies

J. W. Chiou, H. M. Tsai, C. W. Pao, K. P. Krishna Kumar, S. C. Ray, F. Z. Chien, W. F. Pong, M. H. Tsai, C. H. Chen, H. J. Lin, J. J. Wu, M. H. Yang, S. C. Liu, H. H. Chiang, C. W. Chen

Department of Chemical Engineering

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Abstract

X-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy (SPEM) measurements have been performed for Zn_1-xCo _xO and Zn_1-xMg_xO 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 Zn_1-xCo_xO and Zn _1-xMg_xO 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.

Original language	English
Article number	043121
Journal	Applied Physics Letters
Volume	89
Issue number	4
DOIs	https://doi.org/10.1063/1.2240108
Publication status	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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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. (2006). Comparison of the electronic structures of Zn_1-xCo_xO and Zn_1-xMg_xO nanorods using x-ray absorption and scanning photoelectron microscopies. Applied Physics Letters, 89(4), Article 043121. https://doi.org/10.1063/1.2240108

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

abstract = "X-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy (SPEM) measurements have been performed for Zn1-xCo xO 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 Zn 1-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.",

author = "Chiou, {J. W.} and Tsai, {H. M.} and Pao, {C. W.} and {Krishna Kumar}, {K. P.} and Ray, {S. C.} and Chien, {F. Z.} and Pong, {W. F.} and Tsai, {M. H.} and Chen, {C. H.} and Lin, {H. J.} and Wu, {J. J.} and Yang, {M. H.} and Liu, {S. C.} and Chiang, {H. H.} and Chen, {C. W.}",

year = "2006",

doi = "10.1063/1.2240108",

language = "English",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

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Chiou, JW, Tsai, HM, Pao, CW, Krishna Kumar, KP, Ray, SC, Chien, FZ, Pong, WF, Tsai, MH, Chen, CH, Lin, HJ, Wu, JJ, Yang, MH, Liu, SC, Chiang, HH & Chen, CW 2006, 'Comparison of the electronic structures of Zn_1-xCo_xO and Zn_1-xMg_xO nanorods using x-ray absorption and scanning photoelectron microscopies', Applied Physics Letters, vol. 89, no. 4, 043121. https://doi.org/10.1063/1.2240108

TY - JOUR

T1 - Comparison of the electronic structures of Zn1-xCoxO and Zn1-xMgxO nanorods using x-ray absorption and scanning photoelectron microscopies

AU - Chiou, J. W.

AU - Tsai, H. M.

AU - Pao, C. W.

AU - Krishna Kumar, K. P.

AU - Ray, S. C.

AU - Chien, F. Z.

AU - Pong, W. F.

AU - Tsai, M. H.

AU - Chen, C. H.

AU - Lin, H. J.

AU - Wu, J. J.

AU - Yang, M. H.

AU - Liu, S. C.

AU - Chiang, H. H.

AU - Chen, C. W.

PY - 2006

Y1 - 2006

N2 - X-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy (SPEM) measurements have been performed for Zn1-xCo xO 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 Zn 1-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.

AB - X-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy (SPEM) measurements have been performed for Zn1-xCo xO 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 Zn 1-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.

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ER -

Comparison of the electronic structures of Zn_1-xCo_xO and Zn_1-xMg_xO nanorods using x-ray absorption and scanning photoelectron microscopies

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