Abstract Amalgamation of excellent properties of semiconductor nanostructure and carbon nanotubes (CNT) creates advanced material with superior properties which are otherwise unachievable. Here we report cupric oxide (CuO) nanostructure decorated amorphous carbon nanotubes (aCNT) with improved field emission properties. Sharp wedge shaped CuO nanostructure attached aCNT is prepared by a simple cost effective large scale synthesis procedure. Pristine aCNT and CuO-aCNT hetero structure are characterised by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. Field emission properties of CuO-aCNT hybrid structure is compared with bare aCNT sample. The turn-on field of CuO-aCNT in comparison with pristine aCNT is downshifted from 8.07 V/μm to 3.73 V/μm. Density functional theory calculation of aCNT and CuO-aCNT hybrid model has been employed to calculate the work function and hence to estimate the field enhancement factor. This theoretical study has supported our experimental result. Furthermore, the origin of local field enhancement of the hybrid nanostructure is examined by finite element modelling method.

中文翻译：

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定制的 CuO 纳米结构装饰无定形碳纳米管混合体，用于有效场发射器并具有理论验证

摘要 半导体纳米结构和碳纳米管 (CNT) 的优异性能的结合创造了具有其他方式无法实现的优异性能的先进材料。在这里，我们报告了具有改进的场发射特性的氧化铜 (CuO) 纳米结构装饰的无定形碳纳米管 (aCNT)。连接 aCNT 的尖锐楔形 CuO 纳米结构是通过简单的成本有效的大规模合成程序制备的。原始的 aCNT 和 CuO-aCNT 异质结构的特征在于 X 射线衍射、场发射扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱和拉曼光谱。将 CuO-aCNT 混合结构的场发射特性与裸 aCNT 样品进行比较。与原始 aCNT 相比，CuO-aCNT 的开启场从 8.07 V/μm 降低到 3。73 伏/微米。aCNT和CuO-aCNT混合模型的密度泛函理论计算已被用于计算功函数，从而估计场增强因子。这项理论研究支持了我们的实验结果。此外，通过有限元建模方法检查了混合纳米结构的局部场增强的起源。