Raman spectroscopy of large-area graphene by wet transfer method
Raman spectroscopy of large-area graphene by wet transfer method
复制标题
湿转移法大面积石墨烯拉曼光谱
DOI：
10.1117/12.2314929
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发表时间：
2018-02
期刊：
影响因子：
--
通讯作者：
Zhang Xue-Ao
中科院分区：
文献类型：
--
作者：
Tan Yuan;Wang Guang;Yang Hang;Yu Yayun;Zheng Xiaoming;Zhang Xue-Ao
本文采用拉曼光谱研究了转移石墨烯的变化。首先，将化学气相沉积（CVD）法生长的单层石墨烯的拉曼光谱与机械剥离法生长的单层石墨烯的拉曼光谱进行了比较，通过CVD法在铜箔上生长的单层石墨烯的二维拉曼带频率显示出高达12 cm-1的蓝移。采用湿法转移法将铜衬底上CVD生长的石墨烯转移到SiO2（300 nm）/Si上，发现与转移前相比，石墨烯的二维带红移了15 cm-1，并且在某些区域出现了缺陷。根据拉曼光谱的变化，确定了应变是最主要的原因。拉曼位移的观测有助于我们对石墨烯的转移获得更多的物理见解。
In this letter, Raman spectroscopy was used to study the variation of transfer graphene. First, the Raman spectroscopy of chemical vapor deposition (CVD)-grown monolayer graphene was compared with that of mechanical exfoliated graphene, the 2D Raman band frequency of monolayer graphene grown on copper foils by CVD showed a blue shift upto 12 cm-1. Then, the CVD-grown graphene on copper substrates was transferred to SiO2(300nm)/Si by wet transfer method, that caused a 2D-band redshift by 15cm-1compared with the graphene before transferred, besides, the defects appeared in some regions. According to the changes of Raman spectrum, the strain was confirmed as the most important reason in the letter. The observation of the Raman shifts helps us to gain more physical insights into the transfer of graphene.
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