Edge chirality determination of graphene by Raman spectroscopy
Edge chirality determination of graphene by Raman spectroscopy
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DOI：
10.1063/1.3005599
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发表时间：
2008-10
影响因子：
4
通讯作者：
Y. You;Zhenhua Ni;T. Yu;Zexiang Shen
中科院分区：
文献类型：
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作者：
Y. You;Zhenhua Ni;T. Yu;Zexiang Shen
对单层微机械解理石墨烯进行了拉曼成像。无序诱导拉曼特征的强度(∼1350 cm−1处的D带)与边缘手性有关：扶手椅边缘较强，锯齿形边缘较弱。这表明拉曼光谱是识别石墨烯边缘手性从而确定晶体取向的一种可靠而实用的方法。石墨烯手性的测定对于石墨烯的基础研究以及石墨烯器件的应用都是至关重要的。
Raman imaging of single layer micromechanical cleavage graphene was carried out. The intensity of disorder-induced Raman feature (D band at ∼1350cm−1) was found to be correlated to the edge chirality: it is stronger at the armchair edge and weaker at the zigzag edge. This shows that Raman spectroscopy is a reliable and practical method to identify the chirality of graphene edge and hence the crystal orientation. The determination of graphene chirality is critically important for fundamental study of graphene as well as applications of graphene-based devices.