dichalcogenide PMNPT HACrystal phase_change PDMS molecules HOPG PvdfBead SFAs Reading PhthalocyaninePraseodymium HafniumDioxide DeflectionOptics Materials CrystalGrowing MagneticForceMicroscopy Chungnam_National_University membrane Bmp PetruPoni_Institute Trench Sio2 CrAu light_emitting alkanes AM_SKPM Tapping PatternedSapphireSubstrat LiquidImaging Sphere FrictionalForce SrO FastScan contact Layer