2d_materials Metal-organicComplex Piezoelectric LowDensityPolyethylene Ni81Fe19 SrTiO3 layers Blend BFO vertical_PFM Conductance IIT-chennai Polyaniline Conduct ForceVolumeImage PMNPT Implant Fe_film lithography OpticalModulator DIWafer DNAProtein Sapphire GaN Non-ContactMode kelvin probe force microscopy TriGlycineSulphate ContactModeDot biocompatible molecules IcelandSpar Hafnia alkanes SrO BariumTitanate