NUSNNI OpticalElement FrictionalForce plastic Gold dichalcogenide mono_layer NtuEee Platinum Thermal Ferrite PANI MechanicalProperties Boundary Switching Nanostructure Nickel thermal_conductivity Writing FuelCell Calcium LiNbO3 Phenanthrene NUS_Physics PetruPoni_Institute LMF Pore Spincast Copper Semiconductor SolarCell SRAM vertical_PFM Aluminium_Oxide pinpoint mode