Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy

J. W. Chiou; K. P.Krishna Kumar; J. C. Jan; H. M. Tsai; C. W. Bao; W. F. Pong; F. Z. Chien; M. H. Tsai; I. H. Hong; R. Klauser; J. F. Lee; J. J. Wu; S. C. Liu

doi:10.1063/1.1802373

Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy

J. W. Chiou, K. P.Krishna Kumar, J. C. Jan, H. M. Tsai, C. W. Bao, W. F. Pong, F. Z. Chien, M. H. Tsai, I. H. Hong, R. Klauser, J. F. Lee, J. J. Wu, S. C. Liu

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

111 Citations (Scopus)

Abstract

O K-, Zn L₃, and K-edges x-ray absorption near-edge structure (XANES) spectra and scanning photoelectron microscopy (SPEM) spectra were obtained for ZnO nanorods with various diameters. The analysis of the XANES spectra revealed increased numbers of O 2p and Zn 4p unoccupied states with the downsizing of the nanorods, which reflects the enhancement of surface states when the diameter is decreased. Valence-band photoemission spectra show a significant narrowing of the valence band for the 45 nm diameter nanorod. The Zn 3d intensities in the Zn 3d SPEM spectra are drastically diminished for all nanorods as compared to the ZnO reference film, which can be interpreted as a reduction in density of itinerant final states or in transition probability.

Original language	English
Pages (from-to)	3220-3222
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	15
DOIs	https://doi.org/10.1063/1.1802373
Publication status	Published - 2004 Oct 11

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1802373

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Chiou, J. W., Kumar, K. P. K., Jan, J. C., Tsai, H. M., Bao, C. W., Pong, W. F., Chien, F. Z., Tsai, M. H., Hong, I. H., Klauser, R., Lee, J. F., Wu, J. J., & Liu, S. C. (2004). Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy. Applied Physics Letters, 85(15), 3220-3222. https://doi.org/10.1063/1.1802373

@article{b48c2e267900435c84dccd2f271d5bc8,

title = "Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy",

abstract = "O K-, Zn L3, and K-edges x-ray absorption near-edge structure (XANES) spectra and scanning photoelectron microscopy (SPEM) spectra were obtained for ZnO nanorods with various diameters. The analysis of the XANES spectra revealed increased numbers of O 2p and Zn 4p unoccupied states with the downsizing of the nanorods, which reflects the enhancement of surface states when the diameter is decreased. Valence-band photoemission spectra show a significant narrowing of the valence band for the 45 nm diameter nanorod. The Zn 3d intensities in the Zn 3d SPEM spectra are drastically diminished for all nanorods as compared to the ZnO reference film, which can be interpreted as a reduction in density of itinerant final states or in transition probability.",

author = "Chiou, {J. W.} and Kumar, {K. P.Krishna} and Jan, {J. C.} and Tsai, {H. M.} and Bao, {C. W.} and Pong, {W. F.} and Chien, {F. Z.} and Tsai, {M. H.} and Hong, {I. H.} and R. Klauser and Lee, {J. F.} and Wu, {J. J.} and Liu, {S. C.}",

note = "Funding Information: One of the authors (W.F.P.) would like to thank the National Science Council (NSC) of the Republic of China for financially supporting this research under Contract No. NSC 92-2112-M032-025. ",

year = "2004",

month = oct,

day = "11",

doi = "10.1063/1.1802373",

language = "English",

volume = "85",

pages = "3220--3222",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "15",

}

Chiou, JW, Kumar, KPK, Jan, JC, Tsai, HM, Bao, CW, Pong, WF, Chien, FZ, Tsai, MH, Hong, IH, Klauser, R, Lee, JF, Wu, JJ & Liu, SC 2004, 'Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy', Applied Physics Letters, vol. 85, no. 15, pp. 3220-3222. https://doi.org/10.1063/1.1802373

TY - JOUR

T1 - Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy

AU - Chiou, J. W.

AU - Kumar, K. P.Krishna

AU - Jan, J. C.

AU - Tsai, H. M.

AU - Bao, C. W.

AU - Pong, W. F.

AU - Chien, F. Z.

AU - Tsai, M. H.

AU - Hong, I. H.

AU - Klauser, R.

AU - Lee, J. F.

AU - Wu, J. J.

AU - Liu, S. C.

N1 - Funding Information: One of the authors (W.F.P.) would like to thank the National Science Council (NSC) of the Republic of China for financially supporting this research under Contract No. NSC 92-2112-M032-025.

PY - 2004/10/11

Y1 - 2004/10/11

N2 - O K-, Zn L3, and K-edges x-ray absorption near-edge structure (XANES) spectra and scanning photoelectron microscopy (SPEM) spectra were obtained for ZnO nanorods with various diameters. The analysis of the XANES spectra revealed increased numbers of O 2p and Zn 4p unoccupied states with the downsizing of the nanorods, which reflects the enhancement of surface states when the diameter is decreased. Valence-band photoemission spectra show a significant narrowing of the valence band for the 45 nm diameter nanorod. The Zn 3d intensities in the Zn 3d SPEM spectra are drastically diminished for all nanorods as compared to the ZnO reference film, which can be interpreted as a reduction in density of itinerant final states or in transition probability.

AB - O K-, Zn L3, and K-edges x-ray absorption near-edge structure (XANES) spectra and scanning photoelectron microscopy (SPEM) spectra were obtained for ZnO nanorods with various diameters. The analysis of the XANES spectra revealed increased numbers of O 2p and Zn 4p unoccupied states with the downsizing of the nanorods, which reflects the enhancement of surface states when the diameter is decreased. Valence-band photoemission spectra show a significant narrowing of the valence band for the 45 nm diameter nanorod. The Zn 3d intensities in the Zn 3d SPEM spectra are drastically diminished for all nanorods as compared to the ZnO reference film, which can be interpreted as a reduction in density of itinerant final states or in transition probability.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

ER -

Diameter dependence of the electronic structure of ZnO nanorods determined by x-ray absorption spectroscopy and scanning photoelectron microscopy

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