Highly oriented cupric oxide nanoknife arrays on flexible carbon fabric as high performing cold cathode emitter
Highly oriented cupric oxide nanoknife arrays on flexible carbon fabric as high performing cold cathode emitter
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DOI：
10.1039/c3tc31972e
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发表时间：
2014-01
影响因子：
6.4
通讯作者：
Swati Das;S. Saha;Dipayan Sen;U. Ghorai;D. Banerjee;K. Chattopadhyay
中科院分区：
文献类型：
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作者：
Swati Das;S. Saha;Dipayan Sen;U. Ghorai;D. Banerjee;K. Chattopadhyay
在非离子表面活性剂PEG-6000的辅助下，通过一种简单的化学方法在柔性碳纤维表面直接生长了具有锋利刀口的氧化铜（CuO）纳米结构。碳织物基底即使在整个纳米结构生长之后也保持其高柔性。此外，它可以在很大程度上卷起和扭曲，而不会影响电气特性。相纯度和结晶度的开发的纳米结构系统地支持由X射线衍射，X射线光电子能谱，场发射扫描电子显微镜和高分辨率透射电子显微镜。一个建议的生长机制已提供通过彻底分析场发射扫描电子显微镜图像的纳米结构生长在不同浓度的PEG。在所生长的纳米结构中，氧化铜纳米颗粒表现出显著的场发射特性和高稳定性，在室温下具有0.9 V μm−1（10 μA cm−2）的较低开启场，这足以用于基于电子发射的器件，如场发射显示器和真空纳米电子器件。
Sharp knife edged copper oxide (CuO) nano architectures were directly grown on the surface of flexible carbon fabric by a facile chemical route with the assistance of nonionic surfactant PEG-6000. The carbon fabric substrate preserves its high flexibility even after the growth of the entire nanostructure. Moreover, it can be rolled-up and twisted to a large degree without affecting the electrical characteristics. The phase purity and degree of crystallinity of the developed nanostructures were systemically supported by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy and high-resolution transmission electron microscopy. A proposed growth mechanism has been offered by thoroughly analyzing the field emission scanning electron microscopic images of the nanostructures grown at different concentrations of PEG. Among the as grown nanostructures, copper oxide nanoknives have exhibited remarkable field emission properties and high stability with a lower turn-on field of 0.9 V μm−1 (10 μA cm−2) at room temperature, which is sufficient for electron emission based devices like field emission displays and vacuum nano-electronic devices.