Investigation of Quantum-Confinement Effect in a Single CuO Nanowire

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概要

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• Spatially well separated cupric oxide (CuO) nanowires grown using thermal oxidation method were examined to directly observe the scale structure evolution of lattice vibration modes. Scanning electron microscopy and high-resolution transmission electron microscopy studies revealed the single crystalline nature and microstructure of a single CuO nanowire. Phonon spectral evolution along the wire axis was investigated using confocal Raman spectroscopy by scanning a single nanowire. The Ag, B$_{\text{g}}^{(1)}$, and B$_{\text{g}}^{(2)}$ phonon modes of CuO that are quantum-confined in radial directions of the thin nanowire evidenced from the observed systematic red-shift, broadening of the peak profile. These results can be well explained based on the phonon confinement model.

• 2008-01-25

著者

• Cheng Chia-Liang

  Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan

• Huang Yue-Lin

  Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan

• Chou Meng

  Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan

• Wu Sheng

  Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan

• Cheng Chia-Liang

  Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Rd., Sec. 4, Taipei 106, Taiwan, R.O.C.

関連論文

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• Investigation of Quantum-Confinement Effect in a Single CuO Nanowire
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• Study of Pathway of Hydrogen Migration and Desorption on SiGe(100) Surface Using Ab Initio Calculations

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