Hexylthiophene LDPE Ferrite PolyvinylideneFluoride PANI plastic PinPointMode LaAlO3 Fet Dental Celebration UnivCollegeLondon heterojunctions ContactModeDot Ni81Fe19 PtfeMembrane Multiferroic_materials Calcium MagneticForce Transparent OrganicCompound ScanningKelvinProbeMicroscopy temp ForceVolume Zhi C_AFM LiIonBattery Bacterium Electronics ConductingPolymer ScanningIon-ConductanceMicroscopy Austenite InsulatorFilm Inorganic_Compound hetero_structure