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Pulsed thermionic emission from multiwalled carbon nanotube fibers has been demonstrated. From fibers with diameter of 150 μm we obtained an emission current of 16 μA at a repetition rate of 1 kHz. A comparison between our CNT fibers and a tungsten filament is also presented.
In this study, a spin-polarized electron source which can operate at room temperature is reported. <110>-oriented single crystal magnetite whiskers 30 to 200 nm in diameter were synthesized on a stainless steel plate by the combustion flame thermal oxidation process. Microscopic analyses revealed that the whiskers have some defects such as stacking faults and dislocations and also that manganese...
In 1950, E. W. Miiller reported firstly the very feature cloverleaf patterns, which were able to be observed in field emission microscope (FEM) by using many kinds of adsorbed organic small molecules on tungsten tip. Since this discovery till now days, many papers have been reported and several theories have been proposed to explain about these phenomena. Also, relatively complicated total electron...
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