NtuEee NUS_Physics LFM VortexCore Protein fe_nd_b Zhi molecular_self_assembly PUR Hexatriacontane FAFailureAnlaysis PiezoelectricForceMicroscopy epitaxy CompactDisk Mfm molecules DNAProtein Nanostructure LiquidImaging UnivOfMaryland Cross-section MfmPhase MagneticArray Pyroelectric ferromagnetic BiasMode hetero_structure ThermalDetectors plastic Graphite StyreneBeads Melt Chungnam_National_University ReflexLens Polyurethane