Scanning electron microscopy 46 Field emission microscopes 44 Field emission scanning electron microscopy 40 X ray diffraction 21 Zinc oxide 21 Fourier transform infrared spectroscopy 15 Field emission scanning electron microscopes 14 Thin films 14 Substrates 13 Article 12 Sol-gels 12 Malaysia 11 Optical properties 10 Optimization 10 Sustainable development 10 Energy gap 9 Manufacture 9 Morphology 9 Nanostructured materials 9 Thermoelectric equipment 9 Titanium dioxide 9 Carbon 8 Chemical vapor deposition 8 Electronic equipment 8 Graphene 8 Greenhouse gases 8 II-VI semiconductors 8 Palm oil 8 field emission scanning electron microscopy 8 Carbon nanotubes 7