NUS_NNI_Nanocore pinpoint mode Vortex hetero_structure doped CrystalGrowing PolyStylene Scratch Magnetic Current fluoroalkane Techcomp NUS_Physics LaAlO3 HydroGel SiWafer Styrene bias_mode Implant Mfm PvdfFilm TemperatureControl AM_SKPM ElectrostaticForceMicroscopy Morphology Non-ContactMode AM-KPFM GranadaUniv Chloroform MfmAmplitude ThermalConductivity VortexCore DataStorage Resistance Change