Copolymer TiO2 Defect blended polymers NtuEee Carbon Ni81Fe19 conductive Optoelectonics MembraneFilter Spincast HafniumDioxide Deposition gallium_nitride NusEce frequency_modulation Transparent Annealed HighResolution YszSubstrate 2-vinylpyridine Tape LightEmission Temasek_Lab HiVacuum Platinum NUS_Physics CrossSection Piezoresponse Al2O3 biocompatible TemperatureControllerAFM temperature controller AFM CaMnO3 LightEmiting