NUS Flake light_emitting multi_layer Ananth STO self_assembly PolyimideFilm TemperatureControl HDD PVAP3HT PECurve Fet PhaseImaging Magnets thermal_property Bacterium MoS2 PvdfBead Fiber ferromagnetic biocompatible FailureAnlaysis Beads SICM Vortex ScanningTunnelingMicroscopy INSPParis Polyaniline GaN KPFM frequency_modulation FFM Hexatriacontane 3-hexylthiophene