Gong Galfenol self-assembled_monolayer HighAspect fe_nd_b Perovskite Blend Optical NUS ForceVolumeImage Magnetic Force Microscopy Hole Butterfly Defect ContactMode Oxidation light_emission Ecoli Polyvinylidene_fluoride LFM IRDetector ChemicalCompound CancerCell contact PVA BaTiO3 IVSpectroscopy PECurve Biofilm ContactModeDot Indium_tin_oxide silicon_carbide Vortex Pinpoint SAM