PolymerBlend bias_mode Current Lift CancerCell FM-KPFM gallium_nitride PolyvinylAcetate Annealed Ecoli Electical&Electronics Magnets BaTiO3 Strontium PMNPT ImideMonomer SICM flakes temperature controller AFM StainlessSteel pulsed_laser_deposition Collagen University_of_Regensburg CrystalGrowing Neodymium TappingMode StyreneBeads Phase Kevlar PolyvinylideneFluoride MultiferroicMaterials OpticalElement nanomechanical PiezoelectricForceMicroscopy norganic