DIWafer Fluoride ContactModeDots HOPG Vac Praseodymium electrospinning PinPointMode Piezoelectric Christmas Adhesion Resistance BreastCancerCell FrictionalForceMicroscopy GalliumPhosphide Photovoltaics Mechinical LightEmission Sio2 Self-assembledMonolayer Polytetrafluoroethylene strontiu_titanate thermoplastic_elastomers heterojunctions lithography VerticalPFM Wildtype Imprint Cross-section PECurve CopperFoil VinylAlcohol BiFeO3 Polyurethane Wonseok