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Enhanced field emission from a nest array of multi-walled carbon nanotubes grown on a silicon nanoporous pillar array

机译:硅纳米多孔柱阵列上生长的多壁碳纳米管巢式阵列增强的场发射

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A large scale nest array of multi-walled carbon nanotubes (NACNT) was grown on a silicon nanoporous pillar array (Si-NPA) by thermal chemical vapour deposition. Field emission measurements showed that a current density of 6.8 mA cm(-2) was obtained at an electric field of 3.1 V mu m(-1), with a turn-on field of 0.56 V mu m(-1). The enhancement factor calculated according to the Fowler - Nordheim theory was similar to 25 000. This excellent field emission performance was attributed to the unique structure and morphology of NACNT/Si-NPA, especially the formation of NACNT, and the presence of numerous iron particles encapsulated in the CNTs. These results indicated that NACNT/Si-NPA might be an ideal candidate cathode for potential applications in flat panel displays.
机译:通过热化学气相沉积,在硅纳米多孔柱阵列(Si-NPA)上生长了大规模的多壁碳纳米管嵌套阵列(NACNT)。场发射测量表明,在3.1 Vμm(-1)的电场下,接通电场为0.56 Vμm(-1),可获得6.8 mA cm(-2)的电流密度。根据Fowler-Nordheim理论计算出的增强因子类似于25000。这种出色的场发射性能归因于NACNT / Si-NPA的独特结构和形态,尤其是NACNT的形成以及大量铁颗粒的存在封装在CNT中。这些结果表明,NACNT / Si-NPA可能是平板显示器潜在应用的理想候选阴极。

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