S.  Patil, Patil, V., Sathaye, S., and Patil, K., ?Facile room temperature methods for growing ultra thin films of graphene nanosheets, nanoparticulate tin oxide and preliminary assessment of graphene-tin oxide stacked layered composite structure for supercapacitor application?, RSC Advances, vol. 4, no. 8, pp. 4094-4104, 2014.