We have developed a simple method of fabricating few-layer and single-layer graphene which could be used for production on a gram scale [1]. AFM, TEM, Raman and FET measurements all confirm that the process results in high yield of FLG flakes. An important point is that the graphene produced appears to be contamination free as shown from our atomic resolution HRTEM data. Gass et al. [2] concluded in their paper "All detailed observations of graphene appear to show the presence of contamination, indicating that electrical measurements carried out on graphene are also on contaminated layers, even though this does not seem to significantly affect the electronic properties." With our graphene this is not an issue.

We have developed a simple method of fabricating few-layer and single-layer graphene which could be used for production on a gram scale [1]. AFM, TEM, Raman and FET measurements all confirm that the process results in high yield of FLG flakes. An important point is that the graphene produced appears to be contamination free as shown from our atomic resolution HRTEM data. Gass et al. [2] concluded in their paper "All detailed observations of graphene appear to show the presence of contamination, indicating that electrical measurements carried out on graphene are also on contaminated layers, even though this does not seem to significantly affect the electronic properties." With our graphene this is not an issue.