Ni-FeAlloy TransitionMetal ring shape ForceMapping HanyangUniv Photovoltaics DataStorage Calcite Gallium MagneticForce block_copolymer atomic_layer SThM PDMS SPMLabs OpticalModulator mechanical_property CancerCell Cancer NtuEee Silver Floppy FM_KPFM DNAProtein Phthalocyanine PhthalocyaninePraseodymium Sadowski Pyroelectric Insulator self_healing Polyaniline self-assembly Transparent PinpointPFM Oxidation