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    題名: Anomalous blueshift in emission spectra of ZnO nanorods with sizes beyond quantum confinement regime
    作者: Chen, Chun-Wei;Chen, Kuei-Hsien;Ganguly, Abhijit;Chen, Li-Chyong;Wu, Jih-jen;Wen, Hui-I;Pong, Way-Faung
    貢獻者: 淡江大學物理學系
    日期: 2006-06
    上傳時間: 2009-12-31 10:32:39 (UTC+8)
    出版者: College Park: American Institute of Physics
    摘要: Cathodoluminescence (CL) spectroscopy has been employed to study the electronic and optical properties of well-aligned ZnO nanorods with diameters ranging from 50 to 180 nm. Single-nanorod CL studies reveal that the emission peak moves toward higher energy as the diameter of the ZnO nanorod decreases, despite that their sizes are far beyond the quantum confinement regime. Blueshift of several tens of meV in the CL peak of these nanorods has been observed. Moreover, this anomalous energy shift shows a linear relation with the inverse of the rod diameter. Possible existence of a surface resonance band is suggested and an empirical formula for this surface effect is proposed to explain the size dependence of the CL data.
    關聯: Applied Physics Letters 88(24), 241905(3pages)
    DOI: 10.1063/1.2211047
    顯示於類別:[物理學系暨研究所] 期刊論文

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