Abstract
The hybrid thin film comprising ZnO and TiO2 nanoparticles deposited on single-walled carbon nanotube (SWCNT) was prepared by sol-gel process on aluminum-coated silicon wafer. The spin-coated films were further processed by heat treatment followed by hydrothermal process. The synthesized materials were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and photoluminescence spectroscopy for band-gap determination. The coated ZnO formed the nanodisk morphology on the surface of carbon nanotubes with TiO2 nanoparticles incorporated on Al/Si wafer. The FE-SEM analysis before and after hydrothermal treatment with ZnO-TiO2-SWCNT/Al/Si was conducted. The surface properties of the prepared thin films were analyzed for Zn2p, Ti2p, C1s, and O1s of individual spectra by X-ray photoelectron spectroscopy (XPS) analysis. Good reproducibility and quick response time were obtained for ultraviolet (UV) light-sensing activity with ZnO/SWCNT and ZnO-TiO2/SWCNT nanocomposites exhibiting good hydrogen gas sensing activity.