Direct and seedless growth of Nickel Oxide nanosheet architectures on ITO using a novel solution immersion method

Nickel Oxide (NiO) nanosheet architecture films were synthesized using solution immersion method on indium tin oxide (ITO)-coated glass at different growth times. The X-ray diffraction patterns and Raman spectra reveal that crystalline NiO films were grown on ITO glass. The microscopy images exhibit the presence of 10 nm-width nanosheet architectures. The thickness of NiO nanosheet array films increases from 0.78 mu m to 2.50 mu m, when the growth time increases from 1 h to 3 h. The estimated energy bandgap for the prepared NiO nansosheets ranges from 3.55 to 3.62 eV. The prepared NiO nanosheet architecture films has good optical transmittance in the visible region. In this work, the synthesized NiO nanosheet arrays have high potential application for liquid ethanol sensor based on a good sensing response at room temperature. (C) 2018 Elsevier B.V. All rights reserved.