WebOct 29, 2012 · In contrast to the main-stream strategy of growing convex nanostructures upward from the substrates and using them as cold electron sources, it is illustrated in this article that growing concave nanostructures downward into substrates also results in configurations suitable for field emission. Well-ordered TiO2 nanotube arrays were … WebJan 26, 2008 · Hydrated vanadium pentoxide (V2O5·nH2O) nanorod arrays with diameters of ∼200 nm and lengths of more than 5 μm have been synthesized via template-based physical wetting of V2O5 sols. The V2O5·nH2O nanorod arrays were characterized by scanning electron microscopy, X-ray diffraction, and high-resolution transmission …
Arrays of Bundles of Carbon Nanotubes as Field Emitters - NASA
WebOct 11, 2024 · To design efficient and powerful field emission cathodes, the screening effect is of great importance and should be traded off between screening and emitter … WebFeb 29, 2024 · In the first decade of our century, carbon nanotubes (CNTs) became a wonderful emitting material for field-emission (FE) of electrons. The carbon nanotube field-emission (CNT-FE) cathodes showed the possibility of low threshold voltage, therefore low power operation, together with a long lifetime, high brightness, and coherent beams of … craft money
High Current Field Emission from Large-Area Indium Doped ZnO …
WebField emission sources come in a variety of geometries (e.g., conical [Spindt-type] and wedge [knife-edge], to planar thin films and mats of carbon nano-tubes) and materials … WebOct 1, 2015 · The field emission characteristics were measured by the field emission measurement system. Download : Download full-size image Fig. 3. Process diagram of two types of diamond nano-tip array. (a) Obtained in nano-conical holes (b) obtained on top of the barrier layer. 3. Result and discussion 3.1. AAO A field emitter array (FEA) is a particular form of large-area field electron source. FEAs are prepared on a silicon substrate by lithographic techniques similar to those used in the fabrication of integrated circuits. Their structure consists of a very large number of individual, similar, small field electron emitters, usually … See more The original field emitter array was the Spindt array, in which the individual field emitters are small sharp molybdenum cones. Each is deposited inside a cylindrical void in an oxide film, with a counterelectrode … See more Nano-Spindt arrays represent an evolution of the traditional Spindt-type emitter. Each individual tip is several orders of magnitude smaller; as a result, gate voltages can be … See more Essentially very small electron beam generators, FEAs have been applied in many different domains. FEAs have been used to create flat panel displays (where they are known as field emission displays (or "nano-emissive displays"). They may also be used in … See more An alternative form of FEA is fabricated by creating voids in an oxide film (as for a Spindt array) and then using standard methods to grow one or more carbon nanotubes (CNTs) in each void. It is also possible to grow "free-standing" CNT arrays. See more • Field emission display • Field electron emission • Vacuum tubes using field electron emitters • Cold cathode See more craft modular homes