Technology: general issues 29 History of engineering and technology 15 Research & information: general 14 Metals 13 CMOS integrated circuits 7 Chemistry 7 MOS devices 7 Oxide semiconductors 7 Transition metal oxides 7 Transition metals 6 Electrodes 5 Metal nanoparticles 5 Complementary metal oxide semiconductors 4 Electrochemical impedance spectroscopy 4 Metal oxide nanoparticles 4 Metal-oxide 4 Research and information: general 4 Scanning electron microscopy 4 degradation 4 Biology, life sciences 3 Chemical sensors 3 Copper oxides 3 Cyclic voltammetry 3 Electrochemical electrodes 3 Gas detectors 3 Metal oxides 3 Metallic compounds 3 Nanorods 3 Oxidation 3 Performance 3