Semiconductor polymeric_arrays MagneticPhase Nanotechnology Tungsten_disulfide Litho doped PANI ScanningKelvinProbeMicroscopy KAIST CalciumHydroxyapatite EPFL Hexylthiophene light_emitting Conducting Sio2 Array Copper Beads Floppy Au111 UnivOfMaryland LMF FFM LateralPFM WWafer Lateral_Force_Microscopy FrequencyModulation non_contact Cell Techcomp Polarization Titanate GranadaUniv NusEce