Coated glass substrates 2 Interplanar spacings Nickel oxide 2 Substrates 2 Transmittance spectra 2 Cross sectional image 1 Crystallite size 1 Dislocation densities 1 Earthquake engineering 1 Electrical characteristic 1 Engineering geology 1 Face-centred cubic 1 Field emission scanning 1 Flower-like structures 1 Geophysics 1 Hall effect measurement 1 Hall mobility 1 Hole concentration 1 Hole mobility 1 Humidity sensors 1 Nanosheets 1 Nanostructures 1 Nickel oxides (NiO) 1 Optical lattices 1 Optical properties 1 Oxide nanostructures 1 Semiconductor doping 1 Sol-gels 1 Synthesis techniques 1 Temperature 1