title: Formation of ZnO nanostructures grown on Si and SiO2 substrates.
abstract: ZnO nanorods are grown on Si-based substrate by chemical bath deposition method in aqueous solution using zinc nitrate hexahydrate. Various substrates having different surface morphology are used to evaluate their effect on growing ZnO nanorods, such as flat Si(100) wafer, small and large textured-Si wafer, porous silicon, flat SiO2 wafer, small and large textured-SiO2 wafer. The length, diameter, geometry, and coverage density of ZnO nanorods are investigated by field-emission scanning electron microscopy and summarized. SiO2 is a preferred substrate for the growth of ZnO nanorods to Si if the surface morphology of substrate is same, and the textured surface has much higher coverage density (> 95%) than the flat surface. Each nanorod is vertically grown along the c-axis on the top of each pyramid face for textured substrate, and forms the 3D sea sponge-like ZnO structure. The characteristics of ZnO nanorods grown on various substrates are analyzed by grazing-angle X-ray diffraction (XRD) and photoluminescence (PL) measurements.
authors.affiliation: Department of Chemistry and Research Institute for Natural Science, Hanyang University, Seoul, 133-070, Korea.
authors.forename: Seungjin
authors.initials: S
authors.lastname: Lee
authors.forename: Eunkyung
authors.initials: E
authors.lastname: Park
authors.forename: Jongtack
authors.initials: J
authors.lastname: Lee
authors.forename: Taehee
authors.initials: T
authors.lastname: Park
authors.forename: Sang-Hwa
authors.initials: SH
authors.lastname: Lee
authors.forename: Jae-Yong
authors.initials: JY
authors.lastname: Kim
authors.forename: Whikun
authors.initials: W
authors.lastname: Yi