Hysteresys cannabis Sapphire IIT-chennai DIWafer AdhesionEnergy CP-AFM LaAlO3 Friction cannabinoid MagneticArray MfmAmplitude Ram Change 3-hexylthiophene PolyvinylideneFluoride ferromagnetic Wonseok Polyvinylidene Filter Polyethylene SmallScan Au111 PvdfBead Workfunction Writing ScanningTunnelingMicroscopy Grain cannabidiol Memory LiftMode ThermalDetectors Corrosion atomic_steps frequency_modulation