阳极电化学剥离法制备石墨烯的拉曼指纹图谱
Raman Fingerprints of Graphene Produced by Anodic Electrochemical Exfoliation
摘要：
电化学剥离是规模化生产石墨烯的最有前途的方法之一。然而，对石墨烯拉曼光谱的了解有限以及缺乏测量标准严重限制了其工业应用。在这项工作中，我们展示了电化学剥离的石墨烯的拉曼光谱的系统研究，使用不同的电解质和不同类型的溶剂以不同的量产生。我们证明，不能从2D峰的形状提取关于厚度的信息，因为这种类型的石墨烯是有缺陷的。此外，缺陷的数量和样品的均匀性强烈依赖于实验条件，包括后处理。在特定的条件下，形成短的导电反式聚乙炔链已被观察到。我们的拉曼分析通过使拉曼光谱成为一种强大的计量工具，为社区提供了关于如何获取来自电解质、温度和其他实验条件的缺陷信息的指导。
英文摘要：
Electrochemical exfoliation is one of the most promising methods for scalable production of graphene. However, limited understanding of its Raman spectrum as well as lack of measurement standards for graphene strongly limit its industrial applications. In this work we show a systematic study of the Raman spectrum of electrochemically exfoliated graphene, produced using different electrolytes and different types of solvents in varying amounts. We demonstrate that no information on the thickness can be extracted from the shape of the 2D peak as this type of graphene is defective. Furthermore, the number of defects and the uniformity of the samples strongly depend on the experimental conditions, including post-processing. Under specific conditions, formation of short conductive trans-polyacetylene chains has been observed. Our Raman analysis provides guidance for the community on how to get information on defects coming from electrolyte, temperature and other experimental conditions, by making Raman spectroscopy a powerful metrology tool.
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