2008
DOI: 10.1088/0957-4484/19/47/475702
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Raman scattering in Me-doped ZnO nanorods (Me = Mn, Co, Cu and Ni) prepared by thermal diffusion

Abstract: We have investigated normal and resonant Raman scattering in Me-doped ZnO nanorods (Me = Mn, Co, Cu and Ni) prepared by thermal diffusion. Experimental results show that the normal Raman spectra consist of the conventional modes associated with wurtzite ZnO and impurity-related additional modes. Under resonant conditions, only longitudinal optical (LO) phonon scattering and its overtones are observed. The number of LO phonon lines and their relative intensity depend on the doping element and level. For the nan… Show more

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Cited by 86 publications
(66 citation statements)
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“…The G band originates from in-plane vibration of sp 2 carbon atoms is a doubly degenerate (TO and LO) phonon mode (E 2g symmetry) at the Brillouin zone center (Phan et al, 2008). The 2D band originates from a two phonon double resonance Raman process (Djurisic and Leung, 2006).…”
Section: Structural and Optical Resultsmentioning
confidence: 99%
“…The G band originates from in-plane vibration of sp 2 carbon atoms is a doubly degenerate (TO and LO) phonon mode (E 2g symmetry) at the Brillouin zone center (Phan et al, 2008). The 2D band originates from a two phonon double resonance Raman process (Djurisic and Leung, 2006).…”
Section: Structural and Optical Resultsmentioning
confidence: 99%
“…In the undoped ZnO sample, the peaks at 331, 384, and 584 cm −1 correspond to the second-order acoustic (2-E 2 (M)) mode, A 1 transverse optical (A 1 (TO)) mode, and E 1 longitudinal optical (E 1 (LO)) mode, respectively [30]. The sharp and strong peak at around 437 cm −1 can be attributed to the high-frequency branch of the E 2 (E 2 (high)) mode of ZnO, which is the strongest, and typical Raman-active branch of the wurtzite crystal structure [31]. In the Zn 1− x Cu x O nanostructures, the presence of the E 2 (high) mode confirms that they all have a typical hexagonal wurtzite structure, which is consistent with the above HRTEM and XRD observations.…”
Section: Resultsmentioning
confidence: 99%
“…From Figure 4 one observes the effects of Cu-doping on the E 2 (high) mode of ZnO since its intensity decreases. The Raman spectrum indicates a shift in signal at ∼ 437 cm −1 for Cu-doped ZnO, which was observed in ZnO:Cu grown by other techniques [6,[14][15][16].…”
Section: Experimental Details On Hydrothermal Growth Of Doped Zno Nanmentioning
confidence: 56%