Dong-hyun Kim1,Yongjun Shin2,Minseong Kim1,Sangmin An3,Yunjo Jeong3,Kenji Watanabe4,Takashi Taniguchi4,Arend van der Zande5,Gwan-Hyong Lee2,Jangyup Son1
Korea Institute of Science and Technology1,Seoul National University2,Jeonbuk National University3,National Institute for Materials Science4,University of Illinois5
Dong-hyun Kim1,Yongjun Shin2,Minseong Kim1,Sangmin An3,Yunjo Jeong3,Kenji Watanabe4,Takashi Taniguchi4,Arend van der Zande5,Gwan-Hyong Lee2,Jangyup Son1
Korea Institute of Science and Technology1,Seoul National University2,Jeonbuk National University3,National Institute for Materials Science4,University of Illinois5
Two-dimensional (2D) Janus materials are atomically thin membranes with asymmetric structures on surfaces, and those have attracted attention due to unique properties resulting from the different surfaces. However, the fabrication technique for selectively different functionalization is still challenging, and there is a lack of experimental study on the dipole moment in Janus graphene.<br/>Here, we present the way to fabricate H-C-F type Janus monolayer graphene and its dipole properties. Hydrogen plasma and XeF2 gas treatment were used for hydrogenation and fluorination, respectively. We observed the strong dipole moment of H-C-F type Janus graphene via PiFM (Photo-induced Force Microscopy) and EFM (Electrostatic Force Microscopy). Moreover, we observed that the surface-enhanced Raman scattering (SERS) signal of the diluted rhodamine was strong on the Janus graphene surface. We expect this material will be useful for future electronic devices and sensing technologies.