neodymium_magnets C_AFM CeNSE_IISc Multiferroic_materials self_healing ScanningIon-ConductanceMicroscopy membrane molecular_beam Nickel gallium_nitride PolymerPatterns Boron 2d_materials HumanHair University_of_Regensburg Iron LogAmplifier temp Chungnam_National_University Regensburg BismuthVanadate Ecoli SrTiO3 PolyvinylAcetate Materials food BlockCopolymer NUSNNI DataStorage temperature controller AFM Inorganic Change Temperature CrossSection frequency_modulation