title: Wurtzite ZnSe nanowires: growth, photoluminescence, and single-wire Raman properties.
abstract: Wurtzite ZnSe nanowires were prepared on GaAs substrates in a metal-organic chemical vapour deposition system. Electron microscopy shows that they are smooth and uniform in size. Both transmission electron microscopy and x-ray diffraction reveal the wurtzite structure of the nanowires, which grows along the [Formula: see text] direction. Raman scattering studies on individual nanowires were performed in the back-scattering geometry at room temperature. Besides the commonly observed longitudinal and transverse optical phonon modes, a possible surface mode located at 233 cm(-1) is also observed in the Raman spectrum. A peak located at 2.841 eV was clearly observed in the photoluminescence spectra of the nanowires, which can be assigned to near band edge emissions of wurtzite ZnSe.
authors: C X
authors: CX
authors: Shan
authors: Z
authors: Z
authors: Liu
authors: X T
authors: XT
authors: Zhang
authors: C C
authors: CC
authors: Wong
authors: S K
authors: SK
authors: Hark