VortexCore DOE F14H20 PS_LDPE LFM ring shape tip_bias_mode ConductiveAFM Titanate dielectric trench Mechinical SSRM TungstenThinFilmDeposition FuelCell Anneal nanobar Gallium_Arsenide temp OpticalWaveguide SingleLayer University_of_Regensburg silicon_oxide Oxidation temperature_control BismuthFerrite FAPbI3 Friction BoronNitride SoftSample CHRYSALIS_INC Glass Lateral FM-KPFM Reading MolecularSelfAssembly