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A growing number of one-dimensional nanomaterials including nanotubes, nanorods and nanowires have been synthesized and found to give attractive field electron emission performance. Field emission from a two-dimensional (2D) regime is emerging as new hot topic, due to graphene can offer ones such opportunity, and its open surface and sharp edge may be beneficial for field emission. Two-dimensional...
The effects of field emission cycles applied on the screen printed carbon nanotube (CNT) cold cathode were studied. CNT emitters were vertically well aligned and the emission images were visibly improved after the field treatment. The mechanism of the treatment was investigated using scanning electron microscopy. The mechanism may involve the erasion of hot spot and alignment of CNT
The effect of post-deposition plasma etching on the field emission properties of screen-printed multiwalled carbon nanotube electron emitter arrays is investigated. Results prove that short time etching can effectively remove parts of the inorganic binder, aligns the carbon nanotubes and improve field emission properties
Field emission energy distribution (FEED) of an individual SWCNT shows multi-peak feature and confirms that electric field competes with temperature, resulting in no emission peak above Fermi energy. At a constant applied voltage, increasing temperature increases the intensity of all field emission peaks and shifts the peaks towards the higher energy. At a constant temperature, increasing the applied...
The field emission performance of different compositions of multi-wall carbon nanotubes (MWCN) are studied theoretically based on the quantum tunneling theory with the tight-binding approach. We found that the key characteristics of all MWCNs are almost independent of the composition and the layer number of MWCN for MWCNs with the layer number being more than three. The interlayer coupling of MWCN...
Using the quantum tunneling theory with the tight-binding approach, we study the effects of Peierls distortion and the magnetic field in the field emission of carbon nanotubes. The Peierls distortion opens an energy gap at Fermi level, which suppresses the emission current. The responses of the emission current to the magnetic field are quite different for the semiconducting and metallic tubes
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