Abstract
Carbon nanotubes (CNTs) have been widely applied in field emission (FE) due to their high geometric aspect ratio and low work function. More recently, researchers have introduced ruthenium dioxide (RuO 2) as a field emitter because of its excellent chemical and thermal stability due to its oxide nature. This study used the surface morphology of CNTs and the field emission (FE) stability of RuO 2 to improve FE characteristics. Since the work functions of CNTs and RuO 2 are very close, this study combined these two elements by applying a thin film of RuO 2 on the CNT surface. In the process of covering the tips of CNTs with a thin film of RuO 2 eventually obtained the best matching of these two elements. The study not only enhanced the FE performance of CNTs but also extended FE lifetime by applying a thin film of RuO 2 on the CNT tips.
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