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首页> 外文期刊>Physica, B. Condensed Matter >Field emission from combined structures of carbon nanotubes and carbon nanofibers
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Field emission from combined structures of carbon nanotubes and carbon nanofibers

机译：碳纳米管和碳纳米纤维结合结构的场发射

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A convenient and inexpensive approach to producing carbonaceous field emitters has been developed. Combined structures of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) were grown on graphitic substrates with an improved chemical vapor deposition (CVD) method. The fabrication featured a high reaction temperature and a rapid temperature rising. In each combined structure, a CNT with good crystallinity was surrounded by a cone-shaped CNF. The CNTs and the bases of the CNFs were less than 0.1 and 10 mu m in diameter, respectively. These combined CNT/CNF structures, several ten microns in length, had an upward orientation from the substrate and an appropriate separation between each other, which are believed to be two favorable factors to the field emission. Electron current was readily extracted from them. Current densities of 10 mu A/cm(2) and 1 mA/cm(2) were obtained when the average fields between the anode and the cathode were 2.3 and 3.9 V/mu m, respectively. (C) 2010 Elsevier B.V. All rights reserved.
机译：已经开发了一种方便且廉价的生产碳质场发射体的方法。碳纳米管（CNTs）和碳纳米纤维（CNFs）的组合结构通过改进的化学气相沉积（CVD）方法在石墨基板上生长。该制造具有高反应温度和快​​速升温的特征。在每个组合结构中，具有良好结晶度的CNT被锥形CNF包围。 CNT和CNF的底部直径分别小于0.1和10μm。这些组合的长度为几十微米的CNT / CNF结构具有从基板向上的方向以及彼此之间适当的间隔，这被认为是场发射的两个有利因素。电子电流很容易从它们中提取出来。当阳极和阴极之间的平均电场分别为2.3 V /μm和3.9 V /μm时，电流密度分别为10μA/ cm（2）和1 mA / cm（2）。 （C）2010 Elsevier B.V.保留所有权利。

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