Evolution of resonant Raman scattering spectra of ZnO crystallites upon post-growth thermal annealing

Liu, Hongfei; Chua, Soo-Jin; Hu, Guo‐Xiong; Gong, Hao

doi:10.1016/j.jcrysgro.2009.11.052

Cited by 2 publications

(2 citation statements)

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“…1(b)). The broad feature at ∼465 cm −1 , which is assigned to a surface mode of ZnO,8, 9 is suppressed by both the Ag and Ti coating (see the inset in Fig. 1(c)), confirming its sensitivity to the surface environment.…”

Section: Resultsmentioning

confidence: 68%

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Metal‐nanoparticle‐coating‐induced enhancement and weakening of resonant Raman scattering in ZnO: effect of surface electric field

Liu

Huang

Tripathy

et al. 2011

J Raman Spectroscopy

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Effects of Ag and Ti nanoparticle coatings on resonant Raman scattering in various ZnO thin films are presented. The longitudinal optical (LO) phonons, irrespective of the ZnO quality, exhibit an enhancement and a weakening by the Ag and Ti nanoparticle coatings, respectively. The enhancement (weakening) is always accompanied by a reduced (an increased) intensity ratio of the second to first-order LO phonons, which can be associated with changes in the electron-phonon coupling strength in the probed area of ZnO. Angle-resolved X-ray photoelectron spectroscopy provides evidence for the bending of the surface energy bands and their changes induced by the metal coatings. The effect of metal nanoparticle coatings on the Raman scattering of ZnO is thus attributed to the changes in the surface electric field.

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Section: Resultsmentioning

confidence: 68%

“…Such a phenomenon in ZnO has been confirmed by dielectric layer coatings (i.e. Si 3 N 4 and SiO 2 ) which partly passivate the surface states, resulting in an enhancement in the near‐band‐edge (NBE) photoluminescence (PL) emissions while weakening the LO phonon scattering of ZnO 8, 9…”

Section: Introductionmentioning

confidence: 91%