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首页> 外文期刊>Nanotechnology >Optimize the field emission character of a vertical few-layer graphene sheet by manipulating the morphology
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Optimize the field emission character of a vertical few-layer graphene sheet by manipulating the morphology

机译：通过控制形态优化垂直几层石墨烯片的场发射特性

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摘要

Vertical few-layer graphene (FLG) sheets have been fabricated by using microwave-plasma-enhanced chemical vapour deposition. Their shape was manipulated through adjusting the growth time and hydrocarbon gas ratio. The growth mechanism during different growth stages is discussed. The field emission characteristics for different FLG shapes were tested and found to be strongly influenced by the tip shape, the height and the amorphous carbon content. The optimal shape of vertical FLG for field emission had fewer layers, sharp corners, large height and was free of amorphous carbon. The best field emission properties with the optimal shape were observed with a turn-on field of 1.8Vμm ~(-1) and maximum current density of 7mAcm ~(-2).
机译：垂直的多层石墨烯（FLG）薄板已通过使用微波等离子体增强化学气相沉积法制成。通过调节生长时间和烃气比例来控制它们的形状。讨论了不同生长阶段的生长机理。测试了不同FLG形状的场发射特性，发现它们受尖端形状，高度和无定形碳含量的强烈影响。用于场发射的垂直FLG的最佳形状具有较少的层，尖角，高的高度，并且不含无定形碳。在1.8Vμm〜（-1）的开启场和7mAcm〜（-2）的最大电流密度下，观察到具有最佳形状的最佳场发射特性。

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