Crystal Topography University_of_Regensburg heterojunctions ForceVolume fluoroaalkane Platinum Layer semifluorinated_alkane Hafnia EFM STO ScanningKelvinProbeMicroscopy Cross-section MfmAmplitude Composition BiFeO3 Singapore Monisha BloodCell Floppy SFAs Titanate CancerCell Dr.JurekSadowski Yeditepe_University ring shape Growing PS_PVAC OrganicCompound DNAProtein pulsed_laser_deposition Piranha Sulfur MolybdenumDisulfide