In this work we introduce a simple practical way to transfer large flakes of partially reduced graphene oxide (rGO) as well as poly(methyl methacrylate)/rGO films onto arbitrary substrates where the electrode geometry is defined before the film deposition to fabricate devices. It was reported how such films when stimulated by an ultrasound transducer convert mechanical energy to electricity. The possibility to utilize polymer nanocomposites as nanogenerators is of current interest to enhance mechanical energy harvesting and to add new functionalities to polymer nanocomposites.