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Graphene-Anchored p-Type CuBO2 Nanocrystals for a Transparent Cold Cathode
Langmuir ( IF 3.7 ) Pub Date : 2017-09-13 00:00:00 , DOI: 10.1021/acs.langmuir.7b01650
S. Santra 1 , N. S. Das 1 , N. Besra 1 , D. Banerjee 1 , K. K. Chattopadhyay 1
Affiliation  

CuBO2 nanostructures were synthesized by employing a low-cost hydrothermal technique to combine into the CuBO2-RGO nanocomposite for the first time using chemically prepared graphene sheets. The nanohybrid samples were characterized for structural information using X-ray diffraction (XRD) that revealed the proper crystalline phase formation of CuBO2 unaltered by composite formation with graphene. Raman spectroscopic studies were employed to confirm the presence of graphene. A morphological study with field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) suggested the proper wrapping of RGO sheets over CuBO2 nanocubes. Moreover, the close proximity of lattice planes of CuBO2 and RGO to each other was observed in high-resolution TEM studies that were correlated with the Raman spectroscopic studies. Finally, the samples were characterized to study the field emission (FE) properties of the same using a laboratory-made high-vacuum field-emission setup. Finite-element-based theoretical simulation studies were carried out to explain and compare the field emission properties with the experimental results. The FE properties of the composite samples were found to be tuned by the nature of wrapping the RGO sheets over the CuBO2 nanocubes, which was typically dependent upon the spiky morphology of the nanocubes.

中文翻译:

石墨烯固定的p型CuBO 2纳米晶体用于透明冷阴极。

通过使用低成本水热技术合成CuBO 2纳米结构,使用化学制备的石墨烯片首次将其结合到CuBO 2 -RGO纳米复合材料中。使用X射线衍射(XRD)对纳米杂化样品的结构信息进行了表征,该X射线衍射揭示了适当的CuBO 2结晶相形成,而该形成没有因与石墨烯的复合形成而改变。拉曼光谱研究用于确认石墨烯的存在。通过场发射扫描电子显微镜(FESEM)和透射电子显微镜(TEM)进行的形态学研究表明,RGO片材可以正确包裹在CuBO 2纳米立方体上。而且,CuBO 2的晶格面非常接近在高分辨率TEM研究中观察到RGO和RGO彼此之间的关系,这些研究与拉曼光谱研究相关。最后,使用实验室制造的高真空场发射装置对样品进行表征,以研究其场发射(FE)特性。进行了基于有限元的理论模拟研究,以解释和比较场发射特性与实验结果。发现通过将RGO薄片包裹在CuBO 2纳米立方体上的性质可以调节复合样品的FE特性,这通常取决于纳米立方体的尖峰形貌。
更新日期:2017-09-13
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