利用有效的光學共振器激發表面電漿
-研究製備含金奈米顆粒的氧化鋅奈米線及其發光性質

Zinc oxide is a unique material with semiconducting and piezoelectric properties. The most attractive characteristic of Zinc oxide is the optical properties which will open up a lot of applications in optoelectronics. Zinc oxide is a semiconductor material with a large direct bandgap (3.37ev)which is believed to have more light emission efficiency and can realize in UV nanolaser.
Surface-enhanced Raman scattering (SERS), a spectroscopic technique combining novel laser with the galvanizing optical properties of metallic nanostructures, emerges as a crucial methodology for the study of single molecular detection which becomes a compelling topic currently in various disciplines such as nanostructured materials, medicines, biophysics/biochemistry, molecular biology, pharmacology, and environmental science. The ultrasensitive SERS signals stem from the extraordinary enhancement of localized electromagnetic field by attaching molecules on nanoscale metal surface to enable the excitation of surface plasma.
In this thesis, ZnO nanowires were grown on sapphire substrates in a horizontal furnace via VLS process. Optimum process parameters of fabricating ZnO nanowires with gold tips were proposed including growth temperature, chamber pressure, and growth time duration. Characterization and analysis of ZnO nanowires were discussed with many analytic techniques. Photoluminescence spectra (PL) were obtained to show UV emission and green emission of ZnO nanowires and the intensity of green emission largely depends on the length of ZnO nanowire.

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