I'm trying to mechanically exfoliate a decent size (more than 20 um) 1L ReS2 film from bulk using the standard PDMS technique. But, I'm hardly getting any film close to 10 um size. Has someone also experienced similar type of problem? Can anyone please help me how to improve my exfoliation of ReS2?
I'm using commercially available bulk ReS2 from 2D Semiconductor for my research.