Figure 1From: Thinning and functionalization of few-layer graphene sheets by CF4 plasma treatmentOptical images of samples before and after CF 4 plasma treatment. ( a, c) Optical images demonstrating the morphologies of as-prepared samples before CF4 plasma treatment. (b) Optical image of the sample in (a) after 3 s of CF4 plasma treatment. (d) Optical image of the sample in (c) after 5 s of CF4 plasma treatment.Back to article page