non_contact TungstenDeposition atomic_steps MeltingPoint PtfeFilter Mosfet P3HT TemperatureControllerAFM LeakageCurrent Zhi NUS_NNI_Nanocore ScanningIon-ConductanceMicroscopy TiO2 fluoroaalkane Phosphide Photovoltaics Optoelectonics Magnets Scratch gallium_nitride Crystal PhaseImaging DLaTGS CalciumHydroxide molecule Composition LightEmission ScratchMode light_emission BiVO4 Writing CuSubstrate Gallium_Arsenide IIT-chennai Silver