membrane Molybdenum_disulfide Nanofiber TransitionMetal MultiferroicMaterials Scanning_Thermal_Microscopy Switching pinpoint mode frequency_modulation Graphite single_layer PinPointMode Styrene BismuthFerrite IIT-chennai BloodCell Potential Ceramic PtfeMembrane H-BN EFM Vinylpyridine HardDisk molecules GlassTemperature OrganicSemiconductor Heating BaTiO3 HighResolution P3HT doped TipBiasMode Transparent Moire FloppyDisk