Chapter 8
Porous Silicon and Cold Cathodes
Ghenadii Korotcenkov and Beongki Cho
8.1 Cold Cathodes and Their Application
Emission of electrons into vacuum by the surface of metals and semiconductors is considered to be a promising way of building cold cathodes of electronic components for special applications such as fine-resolution electron microscopy, atomic-resolution electron holography, ultrafast processing of signals, sensors, microwave power amplifiers, high-temperature applications or work in hazardous and radioactive environments, and so on (Nation et al. 1999; Temple 1999; Fursey 2003). In the case of gas sensor applications, field emission devices are used as ionization sources. However, the greatest interest to the cold cathodes appeared ...
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