منابع مشابه
Review Article: Rare-earth monosulfides as durable and efficient cold cathodes
In their rocksalt structure, rare-earth monosulfides offer a more stable alternative to alkali metals to attain low or negative electron affinity when deposited on various III-V and II-VI semiconductor surfaces. In this article, the authors first describe the successful deposition of lanthanum monosulfide via pulsed laser deposition on Si and MgO substrates. These thin films have been character...
متن کاملMiniature X-ray Tubes Utilizing Carbon-nanotube-based Cold Cathodes
The electron field-emission properties of carbon nanotubes enable the fabrication of cold cathodes for a variety of vacuum device applications. The utilization of these cathodes is an attractive alternative for the replacement of thermionic or hot cathodes for generating X-rays. Miniature X-ray tubes have been fabricated using triode-style carbon nanotubebased cathodes. In this paper we report ...
متن کاملCeramic Disks as Efficient and Robust Cathodes
Electron emission from ceramic disks depends strongly on the shape of the front electrode. The common interconnected grid is not good for a stable emission. An electrode consisting of an ensemble of metal point-like islands within a metal ring leads to quite a stable emission. In the first case the sandwich of the continuous electrode (on one surface) and the grating (on the front surface) cons...
متن کاملCharacterization of Composites with Aligned Carbon Nanotubes (CNTs) as Reinforcement
3 of 201 Characterization of Composites with Aligned Carbon Nanotubes (CNTs) as Reinforcement by Enrique J. García Submitted to the Department of Aeronautics and Astronautics in partial fulfillment of the requirements for the degree of Master of Science in Aeronautics and Astronautics Abstract Carbon nanotubes’ (CNTs) superlative combination of electrical, thermal, and especially mechanical pro...
متن کاملLocating carbon nanotubes (CNTs) at the surface of polymer microspheres using poly(vinyl alcohol) grafted CNTs as dispersion co-stabilizers.
In this communication, we prepared carbon nanotubes (CNTs) modified by poly(vinyl alcohol) that are used as co-stabilizers for the dispersion polymerization of methyl methacrylate. Poly(methyl methacrylate) microspheres with CNTs selectively located at their surface are formed. This specific localization is a way to enhance the electrical conductivity of the nanocomposite.
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ژورنال
عنوان ژورنال: Materials Today
سال: 2005
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(05)71201-3