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A method of screen printing carbon nanotubes (CNTs) in a dielectric binder to produce low-cost, large area field emission electron sources is presented. Imaging under the scanning electron microscope (SEM) shows the nanotubes forming dense clusters on the substrate surface with protruding CNTs in random orientations. The printed device gives an emission current of 45 mAcm−2 at an applied field of...
This paper present the preliminary experimental results of carbon nanotube(CNT) cold cathode arrays using thermal chemical vapor deposition (TCVD). The results of the field emission test show that the current density of carbon nanotube arrays can achieve 2.2A/cm2 with a total emission current of 17.2mA.
This paper proposes a high reaction area (HRA) electrode with finely dispersed electrocatalysts supported on carbon nanotubes (CNTs) for high performance micro direct methanol fuel cell (μDMFC). Ionomer Nafion® loading by spin-coating on the catalysts was in-detail investigated for performance enhancement in anodic half-cell. In terms of electrochemical surface area (ESA) and charge transfer resistance...
This paper proposes a high surface area of reaction and three-phase zone electrode for micro direct methanol fuel cell (μDMFC) with nano structured carbon nanotubes (CNTs) and Nafion® for the utilization of catalysts. Dense and uniform growth of CNTs on the surface of Si plate can increase the reaction area by 2 orders of magnitude than plain Si plate. Pt nanoparticles deposited on CNTs by chemical...
In this study, a simple process has been proposed for vertically aligned CNT growth on metal foil and then the applied CNT emitter as electron source for X-ray generation.The CNTs were grown using a triode dc-PECVD (plasma enhanced chemical vapor deposition). The growth temperature was maintained at 700 degC. To confirm the electron emission of the vertically aligned CNTs on metal foil, emission current...
Numerous studies have been conducted to date on field emission from carbon nanotubes (CNTs). For CNT film, there were two main methods: direct growth of CNTs onto a substrate, post-treatment to make CNTs adhered onto substrate. In this work, the adhesive taping method was adopted to improve the stability and reproducibility.
In these days, a study on the new luminous source using CNT (carbon nanotube) is in the limelight of mass communication. The core of this study is the principle of field emission in the CNT where electrons are discharged when electric field is applied to the tip of sharp emitters in vacuum and how to drive the pulse generator system for CNT field emission. In this paper, to drive CNT Lamp, various...
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