CalciumHydroxyapatite 2d_materials Korea Regensburg Al2O3 Memory Praseodymium UnivMaryland SingleCrystal Dopped CuSubstrate self-assembled_monolayer SRAM Copper TungstenDeposition IcelandSpar Force-distance electrospinning strontiu_titanate kelvin probe force microscopy PANI Water AM_KPFM PetruPoni STO LiquidImaging WWafer Hafnia Hexatriacontane Polyurethane ImideMonomer VortexCore ElectroChemical ThermalDetectors Grain