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In this study, we fabricated a cathode using screen printing method with carbon nanotubes and ZnO nanotetrapods as cathode emission materials and CsI nanoparticles as coating materials. After several comparative experiments, we find that 3g CsI dispersed into an organic paste which is composed of 20ml terpineol and 1g ethyl cellulose has significant results to improve the performance of the field...
Wide band gap semiconductors are considered as the potential materials for the vacuum nanoelectronic devices, such as field emission device. ZnO micro- and nano-structures with their high aspect ratios are selected as one of candidates for the field emission.The field emission currents from ZnO would enhance with strengthened external electric field, which have been interpreted in terms of the Fowler-Nordheim...
Zinc oxide is a wide band gap semiconductor (WBGS). Its band bending, which usually favors field emission by lowering surface barrier and bringing more electrons to the bottom of conduction band, can be quite dramatic under high field. In the last few years, different kinds of ZnO nano-materials has been synthesized and applied as the cathode materials for field emission. For better application of...
In this paper, the authors report a simple method can control the CNTs distribution. The emission properties of screen-printed CNTs were improved after using with a wetting and dispersing additive simultaneously. Moreover, the screening effect of the agglomerated CNTs emitters are also numerically studied.
Carbon nanotubes (CNTs) have excellent performance in field emission [1-3]; they can be used as field emission (FE) cold cathodes. The traditional FE cold cathode is difficult to apply to the microwave electronic devices. In this paper, we used thermal chemical vapor deposition to synthesize CNTs directly on the surface of traditional thermal-cathode by self-heated. The result proved that the field...
In this paper, we use graphene as conductive layer to improve the field emission properties of CNTs. The metallic nature of graphene and its low contact resistance with metal electrode give a small voltage drop both along the graphene and at the graphene/metal interface. This means that the supply of electrons from the electrode to the emitters is sufficient.
In this paper, we investigate the influence of synthesis temperature on the field emission properties of ZnO nanostructures. The ZnO nanostructures are synthesized by thermal oxidization zinc vapor method. Experimental results illustrate that the geometric morphology of ZnO nanostructures is strongly dependent upon growth temperature.
In this paper, we have studied the contact effect on the field emission properties of ZnO nanostructure printed on various substrates to understand emission performance more exactly. Here we demonstrated the field emission properties from the tetrapodlike ZnO nanostructure screen printed on Ag, carbon nano fiber (CNF)/Ag substrate respectively. The ZnO nanostructure is produced by chemical vapor deposition...
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