Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods

An Jen Cheng; Yonhua Tzeng; Hui Xu; Siddharth Alur; Yaqi Wang; Minseo Park; Tsung Hsueh Wu; Curtis Shannon; Dong Joo Kim; Dake Wang

doi:10.1063/1.3093877

Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods

An Jen Cheng, Yonhua Tzeng, Hui Xu, Siddharth Alur, Yaqi Wang, Minseo Park, Tsung Hsueh Wu, Curtis Shannon, Dong Joo Kim, Dake Wang

Institute of Microelectronics

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

60 Citations (Scopus)

Abstract

The electronic properties of vertically aligned ZnO nanorods have been investigated using micro-Raman spectroscopy. The concentration and mobility of the charge carriers were determined via Raman line shape analysis using longitudinal-optical-phonon-plasmon coupled mode. The local laser heating and the stress effects have been considered when analyzing the Raman spectra. The mobility and carrier concentration of the aligned ZnO nanorods are 84.8 cm2 V s and 3.8× 1017 cm-3, respectively. As a comparison, the mobility and carrier concentration of the undoped bulk ZnO were also obtained from the Raman line shape analysis. The mobility of the aligned ZnO nanorods is about 20% lower than that of the undoped bulk ZnO, which can be attributed to enhanced surface scattering due to the reduction in dimension.

Original language	English
Article number	073104
Journal	Journal of Applied Physics
Volume	105
Issue number	7
DOIs	https://doi.org/10.1063/1.3093877
Publication status	Published - 2009

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.3093877

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@article{7280c1172ac64d1c9b45e131f5dca02e,

title = "Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods",

abstract = "The electronic properties of vertically aligned ZnO nanorods have been investigated using micro-Raman spectroscopy. The concentration and mobility of the charge carriers were determined via Raman line shape analysis using longitudinal-optical-phonon-plasmon coupled mode. The local laser heating and the stress effects have been considered when analyzing the Raman spectra. The mobility and carrier concentration of the aligned ZnO nanorods are 84.8 cm2 V s and 3.8× 1017 cm-3, respectively. As a comparison, the mobility and carrier concentration of the undoped bulk ZnO were also obtained from the Raman line shape analysis. The mobility of the aligned ZnO nanorods is about 20% lower than that of the undoped bulk ZnO, which can be attributed to enhanced surface scattering due to the reduction in dimension.",

author = "Cheng, {An Jen} and Yonhua Tzeng and Hui Xu and Siddharth Alur and Yaqi Wang and Minseo Park and Wu, {Tsung Hsueh} and Curtis Shannon and Kim, {Dong Joo} and Dake Wang",

note = "Funding Information: The authors would like to thank Dr. Lynnette D. Madsen at National Science Foundation (NSF) for funding this project. The project was supported by NSF under Contract No. DMR-0605270. The authors would also like to thank Dr. Bryan Chin. This research was partially supported by the USDA-CSREES under Grant No. 2006-34394-16953.",

year = "2009",

doi = "10.1063/1.3093877",

language = "English",

volume = "105",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "7",

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TY - JOUR

T1 - Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods

AU - Cheng, An Jen

AU - Tzeng, Yonhua

AU - Xu, Hui

AU - Alur, Siddharth

AU - Wang, Yaqi

AU - Park, Minseo

AU - Wu, Tsung Hsueh

AU - Shannon, Curtis

AU - Kim, Dong Joo

AU - Wang, Dake

N1 - Funding Information: The authors would like to thank Dr. Lynnette D. Madsen at National Science Foundation (NSF) for funding this project. The project was supported by NSF under Contract No. DMR-0605270. The authors would also like to thank Dr. Bryan Chin. This research was partially supported by the USDA-CSREES under Grant No. 2006-34394-16953.

PY - 2009

Y1 - 2009

N2 - The electronic properties of vertically aligned ZnO nanorods have been investigated using micro-Raman spectroscopy. The concentration and mobility of the charge carriers were determined via Raman line shape analysis using longitudinal-optical-phonon-plasmon coupled mode. The local laser heating and the stress effects have been considered when analyzing the Raman spectra. The mobility and carrier concentration of the aligned ZnO nanorods are 84.8 cm2 V s and 3.8× 1017 cm-3, respectively. As a comparison, the mobility and carrier concentration of the undoped bulk ZnO were also obtained from the Raman line shape analysis. The mobility of the aligned ZnO nanorods is about 20% lower than that of the undoped bulk ZnO, which can be attributed to enhanced surface scattering due to the reduction in dimension.

AB - The electronic properties of vertically aligned ZnO nanorods have been investigated using micro-Raman spectroscopy. The concentration and mobility of the charge carriers were determined via Raman line shape analysis using longitudinal-optical-phonon-plasmon coupled mode. The local laser heating and the stress effects have been considered when analyzing the Raman spectra. The mobility and carrier concentration of the aligned ZnO nanorods are 84.8 cm2 V s and 3.8× 1017 cm-3, respectively. As a comparison, the mobility and carrier concentration of the undoped bulk ZnO were also obtained from the Raman line shape analysis. The mobility of the aligned ZnO nanorods is about 20% lower than that of the undoped bulk ZnO, which can be attributed to enhanced surface scattering due to the reduction in dimension.

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JF - Journal of Applied Physics

IS - 7

M1 - 073104

ER -

Raman analysis of longitudinal optical phonon-plasmon coupled modes of aligned ZnO nanorods

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