GaAs GaP Electical&Electronics ring shape KelvinProbeForceMicroscopy INSPParis PANI BloodCell molecular_beam kelvin probe force microscopy Conductivity chemical_compound Phthalocyanine NCM\ Change PolycrystallineFerroelectricBCZT DiffractiveOpticalElements pinpoint mode Defect Dopped MfmAmplitude Nanotechnology silicon_oxide Magnetostrictive Ram Wonseok Stiffness conductive margarine Polyvinylidene_fluoride ContactModeDots piezoelectric force microscopy BariumTitanate Annealing PyroelectricDetector