Scanning electron microscopy 17 Field emission scanning electron microscopes 15 Technology: general issues 7 History of engineering and technology 5 Fourier transform infrared spectroscopy 4 Morphology 4 Scanning electron microscope 4 Carbon dioxide 3 Electron microscopy 3 Energy gap 3 Oxide minerals 3 Semiconductor materials 3 X ray diffraction 3 Zinc oxide 3 scanning electron microscope 3 scanning electron microscopy 3 Amorphous carbon 2 Chemical compositions 2 Combustion method 2 Copper 2 Corrosive effects 2 Cost effectiveness 2 Crystallite size 2 Electron microscopes 2 Ethylene 2 Growth inhibition 2 Humans 2 Microorganisms 2 Microstructure 2 Morphological study 2