FuelCell PetruPoni_Institute UnivMaryland PolyvinylideneFluoride ThermalProperties Conduct SelfAssembly CuParticle Friction PvdfFilm LMF self-assembly Terrace Scratch INSP Memory SiliconCrystal Writing Trench FrictionalForceMicroscopy TipBiasMode Vacuum OxideLayer kelvin probe force microscopy Kevlar StyreneBeads MESA structure MagneticForceMicroscopy Copper TungstenDeposition SRAM ForceMapping Formamidinium_lead_iodide PinPointMode Floppy