Abstract
The thesis are divided into two research subjects. They are the controlling growth density and patterning of single crystalline silicon nanowires and the growth of silica nanorings or nanowires for their cathodoluminescence property investigations. In the single crystalline Si nanowires (NWs) part, this study examines the use of monodisperse Au nanoparticles (NPs) as a catalyst for one-dimensional growth of single crystalline Si NWs through the vapor-liquid-solid (VLS) mechanism. The study reports the fabrication of monolayer Au NPs through the self-assembly of Au NPs on a 3-aminopropyltrimethoxysilane (APTMS)-modified silicon substrate. Results reveal that the spin coating time of Au NPs plays a crucial role in determining the density of Au NPs on the surface of the silicon substrate and the later catalysis growth of Si NWs. Also, this study employed optical lithography to pattern Au NPs and treating them as a catalyst for patterning growth of Si NWs. It is believed that this approach may be useful for further studies on single crystalline Si NW-based nanodevices and their properties. In the silica nanorings and nanowires part, this study also examines the use of monodisperse Au nanoparticles (NPs) as a catalyst for the growth of silica nanorings and nanowires. Also, the spin coating time of Au NPs plays a crucial role in determining the density of Au NPs on the surface of the silicon substrate and the later growth of silica nanorings. This study employed optical lithography to pattern Au NPs and treating them as a catalyst for patterning growth of silica NWs. The materials are found to have blue-light emitting from CL analysis. The enhancement in optical properties shall be advantageous in applications for further nanoscale light-emitting devices.