Solar Hexylthiophene NUS_Physics plastic Ram AM_KPFM PinPointMode Sic fe_nd_b CaMnO3 ScanningKelvinProbeMicroscopy nanobar Graphene SingleLayer Scanning_Thermal_Microscopy NCM PVAC ContactMode NeodymiumMagnets fluoroaalkane NusEce high_resolution self_assembly Implant align GaN Copper InorganicCompound Chungnam_National_University NUS Tape AM-KPFM Magnets StainlessSteel mono_layer