The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this work, we report on the fabrication of flexible field emission (FE) devices based on BaO nanostructures synthesized by a chemical bath deposition method. The morphology and composition of BaO nanowires were characterized by FE scanning electron microscopy, high resolution transmission electron microscopy, selected area electron diffraction, X-ray diffraction, and energy dispersive X-ray spectrometer...
Field emission of Graphene is limited by the surface morphology because the existing deposition methods lead to Graphene flakes that lay flat on the substrate. To overcome this problem, we grow vertically aligned Graphene flakes on Cu particles using chemical vapor deposition method. The Graphene flakes are oriented at some angles with respect to the substrate, leading to good field emission performance...
Graphene has a huge variety of unique optoelectronic properties. Its recent rapid emergence and demonstrable richness in electron transport has been unprecedented. This atomically thin, ordered structure has exceptionally high attainable aspect ratios - potentially higher even than that of carbon nanotubes - whilst defective edge terminations rich in dangling bonds render it superior to metallic nanowires;...
Zinc oxide was directly grown on the graphene layer by the hydrothermal synthesis method, and the field emission property of this hybrid structure was tested by a diode structure device. Compared with the Zinc oxide directly grown on the silicon substrates, the hybrid emitter shows better performance in the field emission properties, including low turn-on field, threshold field and high emission current...
Zinc oxide nanowires (ZNWs) are grown on vertically-aligned carbon nanotubes (CNTs) by vapor phase transport method. Field emission properties of these nanowires have been studied and then compared with similar nanowires fabricated on flat silica substrates. This composed nanostructure has minimized the field-screening effects provoked by the proximity of neighbour tubes. This work demonstrates that...
In order to fulfill the requirements of large current field emission, a kind of stratified carbon film has been synthesized by local heating chemical vapor deposition method. In this stratified structure, carbon fibers with the diameter of more than 500nm have been formed and intertwined with each other as conductive net; carbon nanotubes with the diameter about less than 30nm can be synthesized around...
Carbon nanotubes (CNTs) have excellent performance in field emission; they can be used as field emission (FE) cold cathode. In this paper, we used thermal chemical vapor deposition to synthesize CNTs directly on the surface of traditional thermal-cathode; we changed the sputtering time of catalyst and found that it had a major impact on the emission properties, some discussion were also give.
Carbon nanotubes (CNTs) have attracted considerable attention due to their unique structure, remarkable properties, and their potential for a variety of applications, since their discovery by Iijima in 1991.The nanotube's high field enhancement, high aspect ratios, small tip radii of curvature and high current density make it a nearly ideal electron source for field emission. This paper discusses...
A local heating chemical vapor deposition method is used to synthesize carbon nanotubes onto a metal substrate. Compared with normal thermal chemical vapor deposition, this method can provide faster growth rate, more nodes can be formed onto the carbon nanotubes, and emission sites can be increased largely. A maximum current over 100 mA was obtained from carbon nanotubes emitter layer with emission...
In this paper, we have reported the formation of ZnO Nano tetrarods on the well-polished metallic (copper) substrate and the p-silicon substrate by using catalytic vapor phase transport. The substrates were placed into one traditional tube furnace with a quartz tube. Grains of cobalt oxides were spread on the surface of the substrates. They were placed at the downstream end. Zn powder (~ 99.9%) was...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.