Photovoltaics FrequencyModulation Anneal China Wang Crystal Sapphire Epoxy piezoelectric force microscopy self-assembly polymeric_arrays AdhesionForce Grain Lattice TiO2 DomainSwitching Bmp ContactMode STO SiliconeOxide BiasMode MeltingPoint Conductance Gallium GaAs Polyethylene BismuthFerrite fifber Lateral_Force_Microscopy molecular_beam nanomechanical BariumTitanate University_of_Regensburg fluoroaalkane OpticalWaveguides