ScratchMode ring shape Wang Wonseok norganic LateralForce Global_Comm OrganicCompound Praseodymium Laser Aluminum GaN kelvin probe force microscopy Non-ContactMode InorganicCompound DNA UTEM PolymerBlend PS_PVAC optoelectronics NiFe Titanate Molybdenum_disulfide SmallScan Inorganic_Compound Film Polyaniline SThM CVD PinpointNanomechanicalMode Conductivity TungstenThinFilmDeposition LiftHeight Piezoelectric DentalProsthesis