cannabinoid HanyangUniv amplitude_modulation doped BTO food Cobalt-dopedIronOxide AlkaneFilm Tapping Composition Polytetrafluoroethylene Aluminum Patterns temp Current HBN SPMLabs Liquid piezoelectric force microscopy TempControl temperature controller AFM LowDensityPolyethylene oxide_layer Self-assembledMonolayer thermal_conductivity PetruPoni_Institute Polyvinylidene silicon_carbide pinpoint mode Electrical&Electronics Array VinylAlcohol Boron pulsed_laser_deposition Copolymer