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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Carbon nanotubes and nanofibers synthesized by CVD on nickel coatings deposited with a vacuum arc
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Carbon nanotubes and nanofibers synthesized by CVD on nickel coatings deposited with a vacuum arc

机译：在真空电弧沉积的镍涂层上通过CVD法合成的碳纳米管和纳米纤维

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摘要

Nanotubes and nanofibers were grown on Ni coatings deposited by plasma generated with a pulsed vacuum arc on silicon wafers using three different bias conditions: at floating potential (approximately +30 V respect to the grounded cathode); at ground potential; and at –60 V. An atomic force microscopy study showed that the Ni film morphology was affected by the bias condition of the substrate. The morphology of carbonaceous species depended on Ni-films characteristics. FE-SEM and TEM analyses have shown that nanofibers growth was favoured on Ni coatings deposited at –60 V whereas nanotubes grew mainly on Ni coatings obtained at floating and ground potentials. Hence, this new method to produce the precursor can be optimized to obtain nanotubes or nanofibers varying the substrate bias for the Ni deposition.
机译：纳米管和纳米纤维生长在Ni涂层上，该Ni涂层是通过使用三种不同的偏压条件在硅片上通过脉冲真空电弧产生的等离子体沉积而成的：在浮置电位下（相对于接地的阴极约为30 V）;处于地电位原子力显微镜研究表明，Ni膜的形貌受衬底偏压条件的影响。碳质物质的形态取决于镍膜的特性。 FE-SEM和TEM分析表明，在–60 V沉积的Ni涂层上纳米纤维的生长受到促进，而在浮置和接地电势下获得的Ni涂层上纳米管主要生长。因此，可以优化这种生产前体的新方法，以获得改变Ni沉积衬底偏压的纳米管或纳米纤维。

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