A comparative study of field emission from NanoBuds, nanographite and pure or N-doped single-wall carbon nanotubesстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] A comparative study of field emission from nanobuds, nanographite and pure or n-doped single-wall carbon nanotubes / V. I. Kleshch, T. Susi, A. G. Nasibulin et al. // Physica Status Solidi (B): Basic Research. — 2010. — Vol. 247, no. 11-12. — P. 3051–3054. Field emission characteristics of multi-emitter flat cathodes prepared from Nano Buds, few-layer graphite flakes (nanographite, NO) and pure or N-doped single-wall carbon nanotubes (SWNTs) have been examined. The cathodes demonstrated a low-voltage electron emission with the threshold field values of few Volts per micron, which were ascribed to the high-aspect ratio of nanocarbons. The films of Nano Buds and NO possess excellent emission pattern homogeneity with an emission site density of more than 10(5) cm(-2). This is much higher than for cathodes made of conventional SWNT films. It was found that the achievable maximal current density depends on the type of carbon material and reaches 10 A/cm(2) for NanoBuds film, while for the NO film cathodes, it is about one order of magnitude less. Possible mechanisms responsible for the experimentally observed differences are discussed. The materials examined are of great interest due to their high emission characteristics and are promising for the development of new types of vacuum electronic devices. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. [ DOI ]

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