Pvdf Stiffness hetero_structure solar_cell graphene_hybrid nanobar Biofilm ForceVolume TemperatureControllerAFM FAFailureAnlaysis Strontium Reduction AdhesionForce Cell Sio2 ConductiveAFM small_scan Modulus strontiu_titanate Croatia Polyvinylidene doped Plug SelfAssembly #Materials Protein cooling ImideMonomer lift_mode Adhesive SiliconeOxide STO Bacterium Memory ring shape