Electric Field Assisted-Assembly of Perpendicular Oriented ZnO Nanorods on Si Substrate

Abstract

In this work, we report a new electric-field assisted assembly technique used to vertically-align ZnO nanorods on the Si substrate during their growth. In the assembly process, the forces that induce the alignment are a result of the polarization of the electric field. The synthesis was carried out at near-room temperature (90° C). Novel measurements on these structures show encouraging characteristics for future applications. The phase purity, composition and morphology of the synthesized products by the assembly method were examined by XRD, TEM, and SEM. Room-temperature micro-Raman spectroscopy was performed to examine the properties of the self-assembly ZnO nanorods on Si substrate structures. Such highly oriented and ordered ZnO nanorods could be beneficial for field emission, solar cells, LEDs and spintronic applications.