Raman enhancement by graphene-GaO 2D bilayer film

Zhu, Yun; Yu, Qing-Kai; Ding, Gu-Qiao; Xu, Xu-Guang; Wu, Tian-Ru; Gong, Qian; Yuan, Ning-Yi; Ding, Jian-Ning; Wang, Shu-Min; Xie, Xiao-Ming; Jiang, Mian-Heng
December 2014
Nanoscale Research Letters;Dec2014, Vol. 9 Issue 1, p1
Academic Journal
2D β-GaO 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 GaO flakes grew on the surface of graphene film during the cooling process. In particular, tenfold enhancement of graphene Raman scattering signal was detected on GaO flakes, and XPS indicates the C-O bonding between graphene and GaO. The mechanism of Raman enhancement was discussed. The 2D GaO-2D graphene structure may possess potential applications. PACS: 61.46.-w (structure of nanoscale materials), 68.65.Pq (graphene films), 74.25.nd (Raman and optical spectroscopy)


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