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Using the tunneling effect under high electric field, field emission cold cathode could obtain an emission current which is large enough. In this paper, we reported the large field-emission from CNTs and ZnO tetrapods composited field emitters. Screen-printing method is used in our experiment and more than 15 mA field-emission current is obtained with 0.5 mm gap.
A local heating chemical vapor deposition method is used to synthesize carbon nanotubes onto a metal substrate. Compared with normal thermal chemical vapor deposition, this method can provide faster growth rate, more nodes can be formed onto the carbon nanotubes, and emission sites can be increased largely. A maximum current over 100 mA was obtained from carbon nanotubes emitter layer with emission...
A novel sealing structure is proposed to make in situ measurement of pressure for nondestructive. A small gauge, consisting of a cathode (carbon nanotubes field emitter arrays), a grid, and a collector, is sealed together with FEDs. The gauge is analogous to a conventional hot cathode ionization gauge but has a cold cathode (CNT). This gauge is calibrated in an ultra-high vacuum (UHV) system with...
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