An innovative way of etching MoS2: Characterization and mechanistic investigation
MoS2, etching, XeF2, graphene, photoluminescence, hexagonal
We report a systematic study of the etching of MoS2 crystals by using XeF2 as a gaseous reactant. By controlling the etching process, monolayer MoS2 with uniform morphology can be obtained. The Raman and photoluminescence spectra of the resulting material were similar to those of exfoliated MoS2. Utilizing this strategy, different patterns such as a Hall bar structure and a hexagonal array can be realized. Furthermore, the etching mechanism was studied by introducing graphene as an etching mask. We believe our technique opens an easy and controllable way of etching MoS2, which can be used to fabricate complex nanostructures, such as nanoribbons, quantum dots, and transistor structures. This etching process using XeF2 can also be extended to other interesting two-dimensional crystals.
Tsinghua University Press
Yuan Huang,Jing Wu,Xiangfan Xu,Yuda Ho,Guangxin Ni,Qiang Zou,Gavin Kok Wai Koon,Weijie Zhao,A. H. Castro Neto,Goki Eda,Chengmin Shen,Barbaros Özyilmaz, An innovative way of etching MoS2: Characterization and mechanistic investigation. NanoRes.2013, 6(3): 200–207