Abstract
In this study, the hydrothermal method was employed to synthesize an oriented ZnO nanorod array on an annealed gold seed layer coated on a glass substrate from different precursor concentrations. Zinc nitrate hexahydrate and hexamethylenetetramine were used as starting materials for ZnO nanorod growth. The effect of gold seed layer roughness on the orientation of ZnO nanorods is presented. The morphology of the nanorods shows that oriented ZnO nanorods were obtained after deposition on the annealed gold seed layer. Energy dispersive x-ray spectroscopy was used to identify the elemental composition and identify the elements present in the samples. The XRD pattern shows that the nanorods have a good crystalline structure, with dominant (002) peaks for all concentrations, which reflects that the c-axis of the elongated nanorods is oriented normal to the substrate. The proposed growth mechanism for the growth of ZnO nanorods is presented.
Highlights
Well-aligned ZnO nanorods have attracted extensive attention recently due to their potential applications in photonics, electronics, optoelectronics, and electrochemical nanodevices.[1]
The hydrothermal method was employed to synthesize an oriented ZnO nanorod array on an annealed gold seed layer coated on a glass substrate from different precursor concentrations
Lattice matching between the substrate and ZnO is an important factor in scitation.org/journal/adv producing vertically aligned ZnO nanorods
Summary
Fan et al.[14] compared the vertically aligned ZnO nanowires grown on two different substrates, namely, GaN and sapphire They concluded that because GaN had a similar lattice to and the same crystal structure as ZnO, the growth of aligned ZnO nanorods was made possible. An atomic force microscope (NC 100 Park systems, USA) was used for the surface roughness measurement of the gold seed layer coated on a substrate for nanorod growth. All the chemicals such as zinc nitrate hexahydrate [(Zn(NO3)2 ⋅ 6H2O] and hexamethylenetetramine (C6H12N4) (Sigma-Aldrich) were of analytical reagent grade and used without further purification. Chromium–gold (Cr–Au) coated glass slides were used as a substrate and cleaned ultrasonically before coating
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call