title: Orientation-enhanced growth and optical properties of ZnO nanowires grown on porous silicon substrates.
abstract: ZnO nanowires have been synthesized on porous silicon substrates with different porosities via the vapour-liquid-solid method. The texture coefficient analysed from the XRD spectra indicates that the nanowires are more highly orientated on the appropriate porosity of porous silicon substrate than on the smooth surface of silicon. The Raman spectrum reveals the high quality of the ZnO nanowires. From the temperature-dependent photoluminescence spectra, we deduced the activation energies of free and bound excitons.
authors: Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Tahsueh Road, Hsinchu 30050, Taiwan.
authors: Hsu-Cheng
authors: HC
authors: Hsu
authors: Ching-Sheng
authors: CS
authors: Cheng
authors: Chia-Chieh
authors: CC
authors: Chang
authors: Song
authors: S
authors: Yang
authors: Chen-Shiung
authors: CS
authors: Chang
authors: Wen-Feng
authors: WF
authors: Hsieh