Cobalt Carbon optoelectronics P3HT Conducting Sio2 atomic_steps solar_cell molecular_beam Workfunction BreastCancerCell Iron chemical_compound PinpointPFM YttriaStabilizedZirconia Leakage Graphite Chromium semifluorinated_alkane semifluorinated alkane SAM TransitionMetal CompactDisk HanyangUniv Magnetic MechanicalProperties amplitude_modulation ThinFilm MfmPhase Conductivity Tapping TemperatureControllerAFM C_AFM 2dMaterials SurfaceChange