The influence of nitrogen plasma treatment on the lattice vibrational properties of hydrothermally grown ZnO nanorods

Journal Article · Mon Apr 07 04:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2905282· OSTI ID:21101977

Le, H Q; Tripathy, S; Chua, S J ^[1]

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1. Institute of Materials Research and Engineering, A-STAR - Agency for Science, Technology, and Research, 3 Research Link, 117602 Singapore (Singapore)

In this study, the authors have investigated the optical properties of hydrothermally grown ZnO nanorods subjected to the combination of thermal annealing and nitrogen plasma treatments. In particular, ultraviolet-visible micro-Raman scattering has been used to study the influence of nitrogen incorporation in ZnO nanorods grown on GaN/sapphire templates. The band-edge photoluminescence spectra show significant changes due to nitrogen plasma treatment. In addition, visible Raman spectra show intensity enhancement of the disorder-activated vibrational modes from plasma-treated ZnO nanorods. Multiple longitudinal optical (LO) phonons are observed under ultraviolet resonant Raman excitation from these nanorods. The first-order resonant LO phonon line shape fitting is correlated to the nitrogen-induced lattice disorder.

• OSTI ID: 21101977
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 92; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTAL GROWTH
EXCITATION
GALLIUM NITRIDES
NANOSTRUCTURES
NITROGEN
OPTICAL PROPERTIES
PHONONS
PHOTOLUMINESCENCE
PLASMA
RAMAN EFFECT
RAMAN SPECTRA
SAPPHIRE
SEMICONDUCTOR MATERIALS
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
ZINC OXIDES