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.
Field Emission Pattern Image of Carbon Nanotubes has been captured by using electron beam scanning analyzer. The measurement showed that the Faraday cup scanning method can provide a high resolution field emission sites distribution measurement (the best resolution is up to 0.01mm), which is higher than that using the transparent anode method.
In this paper, we report our first experimental findings that evidence the vacuum level in the test chamber can be responsible for variation in the field emission (Fowler-Nordheim) response of an electron source. This situation is exampled using a carbon nanotube sample measured in a parallel plate configuration.
The following topics are dealt with: vacuum nanoelectronics; 3- to 0-dimensional electron gas; field emission and ion microscopy; carbon nanotubes; electron-wave interference; nanometer-scale distribution of field emission current; Fowler-Nordheim plots and Millikan-Lauritsen plots; N-type semiconductors; field emission array cathode; free electron lasers; annealing; screen-printing triode; carbon...
In this work, nanocarbon-derived vacuum electronic devices, viz., the nanodiamond lateral triodes and transistors and the CNT integrated differential amplifiers are examined. The material properties, device structure and fabrication process, and the electrical performance of these devices are presented.
Field emitter arrays (FEAs) need improved novel cold cathode materials for better and more reliable performance. The presence of negative electron affinity (NEA) on hydrogen-terminated diamond surfaces, coupled with practical chemical vapor deposition (CVD) processing of deposited diamond as a thin film on a variety of substrates, has promoted further interest in the use of diamond and diamond-like...
A novel aligned carbon nanotubes (CNTs) gas sensor based on gas discharge has been achieved. The sensor was composed of aluminum cathode electrode, insulated film and CNTs anode electrode. Due to adopting the method of anodic aluminum oxide (AAO) template to grow aligned CNTs, the electrode and CNTs were integrated, so the gas sensor simplified its structure and processing technics. As different gases...
The following topics are dealt: vacuum nanoelectronics; carbon nanotube field emitter array applications; field emission cathode; field emission display; field emission mechanism characterisation; photoemission theory; ZnO nanostructured materials; novel emitter materials; XPS characterisation; field emission triode and MEMS.
In this paper, we will focus on the application of CNT cold cathodes in low current X-ray tubes operating at 25kV to 40kV. Detailed discussion will include cathode performance requirements from a commercial product point of view, the performance and status of current cathodes, factors that affect the tube production yield, and operating life and reliability. Measurement of electron beam distribution...
In this study, arc discharge multiwall carbon nanotubes have been incorporated into PmPV polymer, a derivative of the conjugated polymer PPV. Electron field emission characterisation was made as a function of nanotube mass fraction using large area phosphor coated anode. It is concluded that emission occurs at front surface under the action of applied field. As the mass fraction of nanotubes is increased,...
This paper proposed a new way to optimize the cathode pattern, which improves the emission performance easily and efficiently. The edge effect was firstly analyzed by numerical simulation and verified by light spot measurement experiments. Then several emission current density profiles along the surface of cathode with different cathode patterns were presented. Both qualitative and quantitative comparisons...
Summary form only given. The ubiquitous CRT is finally being overtaken in terms of volume production by flat panel technologies, predominantly based on liquid crystals. It has taken over 30 years for the first LCD based displays to be established, and, at present, to dominate the market. Field emission (FE) based displays are currently at a turning point in establishing a toehold in the hugely competitive...
Summary form only given. Recently, the carbon nanotube field emission display has drawn more and more concern. With its excellent image display quality and low fabrication expense, the printable CNT-FED will take the place of cathode ray tube as the major consumer-priced and mass-market display. A normal CNT-FED device is composed of the CNT cathode, the gate electrode, the anode and dielectric insulator...
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.