DentalProsthesis Vinylpyridine UnivMaryland HexagonalBN molecule BFO Mobile Step amplitude_modulation NTU Sapphire Floppy 2-vinylpyridine NiFe biocompatible Scratch LateralForce LiftHeight HDD Vac Litho high_resolution Filter Temperature Switching Christmas plastics Polytetrafluoroethylene CaMnO3 Au111 STM AtomicLayer AdhesionForce MetalCompound polyvinyl acetate