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Field emission characteristics of CNT paste emitters were improved using the CNTs annealed at high temperatures of 1400∼2000°C in Ar. The annealing considerably enhanced the crystallinity of CNTs, as indicated by an increase of their IG/ID ratios and TGA oxidation temperatures. With such highly crystalline CNTs engaged, the turn-on electric fields and long-term emission stability of the CNT pastes...
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