ScanningTunnelingMicroscopy fluoroaalkane Pipette NTU CalciumHydroxide Conductive AFM biocompatible Calcium Morphology CrAu Litho Strontium Tungsten_disulfide pinpoint mode LateralForceMicroscopy TipBiasMode Polyaniline molecules Pinpoint high_resolution PatternedSapphireSubstrat FM_SKPM Cobalt Semiconductor Ananth CastIron Wildtype Modulus molecular_beam BiFeO3 Beads light_emission TungstenThinFilmDeposition 3-hexylthiophene Sperm