Photovoltaics AM_KPFM AM_SKPM EFMAmplitude NUS_Physics CVD Step layers molecular_beam gallium_nitride WPlug SelfAssembly ScanningTunnelingMicroscopy Tape Growing VerticalPFM Electical&Electronics Etch light_emission mechanical property SicMosfet ConductingPolymer ScanningThermalMicroscopy rubber SmalScan NUSNNI ContactModeDots ForceVolumeMapping PetruPoni Granada FloppyDisk WS2 fluoroalkane Layer Styrene