Abstract
The present thesis focused on the synthesis, characterizations and applications of the one-dimensional 1-D Ga-based nanometerials, including the following topics: (1) synthesis of pure Ga2O3 nanowires, (2) synthesis and fabrication of nanodevices of gold-peapodded Ga2O3 nanowires, (3) investigation of optical and electrical properties of gold-peapodded Ga2O3 nanowires. Here, we report two different methods to synthesize gold-peapodded Ga2O3 nanowires, (a) one-step method: novel metal-insulator heterostructures made of twinned Ga2O3 nanowires with embedded discrete gold particles were achieved through a reaction between gold, gallium, and silica at 800° C. (b) two-step method: various gold-peapodded Ga2O3 nanowires were well designed via thermal annealing processes of the core-shell gold-Ga2O3 nanowires at a sufficient high temperature. Furthermore, dark-field optical microscopy was utilized to investigate the localized surface plasmon resonance (LSPR) characteristics of 1-D Ga-base nanowires. It was observed that varied scattering spectra peaks were obtained with different embedded particle sizes and shapes. Owing to the localized surface plasmon resonance effect, single gold-peapodded Ga2O3 nanowire device with highly photosensitive absorption of 532 and 658 nm visible light was designed, which may be chosen as potential building blocks for nanoscale optoelectronics.