Indent BFO SolarCell ForceDistanceSpectroscopy Ito PinpointPFM Sio2 Graphene Copolymer TiO2 solar_cell layers PtfeFilter Mechinical DiffractiveOpticalElements AIN Hysteresys Battery AtomicLayer NUSNNI NTU ScanningKelvinProbeMicroscopy SAM Wafer Polyimide Mechanical&nanotechnology DOE nanomechanical SingleLayer fluoroalkane Force-distance UTEM #Materials Non-ContactMode BiasMode