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- W1999972042 abstract "Carbon Nanotubes (CNTs) are promising candidates for cold cathodes because of their high aspect ratio and robustness. However, the major hindrance in cold cathode based applications is the screening effect, which reduces the effective field at the tip and thereby the current density. The emission current can be improved by minimising the screening effect. The adverse effect of screening can be addressed by either controlling the growth density or by optimising the patterns of CNT cathodes. Here, novel patterns have been used to increase edge length per unit area in planar vertically aligned CNT bundles. Our motive was to increase the number of effective emitters, since the CNT at the edges are less screened by the proximal CNTs. By varying geometry and spacing of solid CNT dot patterns and by introducing the square ring structures; we could successfully enhance the effective emitters at the edges. It has been observed that an enhancement of edge length from 0.032 per micron to 0.2 per micron increases the..." @default.
- W1999972042 created "2016-06-24" @default.
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- W1999972042 date "2013-05-29" @default.
- W1999972042 modified "2023-10-03" @default.
- W1999972042 title "Novel ring structure for minimisation of screening effect in carbon nanotube based field emitters" @default.
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- W1999972042 doi "https://doi.org/10.1080/17458080.2013.788227" @default.
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