LiquidImaging Gold gallium_nitride Mechanical MultiferroicMaterials piezoelectric force microscopy ConductiveAFM HighAcpectRatio Hydroxyapatite Carbon Crystal multi_layer MembraneFilter PvdfFilm Subhajjit MolecularSelfAssembly Polarization OpticalWaveguides FrequencyModulation Mobile F14H20 TipBiasMode Ca10(PO4)6(OH)2 Sic HydroGel organic_polymer thermoplastic_elastomers Hole NUSNNI Nanopattern Hysteresys AtomicLayer GalliumPhosphide MagneticForce Fe_film