Raman enhancement by graphene-Ga2O3 2D bilayer film.
2D β-Ga2O3 flakes on a continuous 2D graphene film were prepared by a one-step chemical vapor deposition on liquid gallium surface. The composite was characterized by optical microscopy, scanning electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy (XPS). The experimental results indicate that Ga2O3 flakes grew on the surface of graphene film during the cooling process. In particular, tenfold enhancement of graphene Raman scattering signal was detected on Ga2O3 flakes, and XPS indicates the C-O bonding between graphene and Ga2O3. The mechanism of Raman enhancement was discussed. The 2D Ga2O3-2D graphene structure may possess potential applications.
Yun
Y
Zhu
Qing-Kai
QK
Yu
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, People's Republic of China. gqding@mail.sim.ac.cn.
Gu-Qiao
GQ
Ding
Xu-Guang
XG
Xu
Tian-Ru
TR
Wu
Qian
Q
Gong
Ning-Yi
NY
Yuan
Jian-Ning
JN
Ding
Shu-Min
SM
Wang
Xiao-Ming
XM
Xie
Mian-Heng
MH
Jiang