NUS_Physics KevlarFiber LFM Led STO Annealing Vanadate Materials Tin disulfide INSPParis CeramicCapacitor Litho Ni81Fe19 PatternedSapphireSubstrat Graphene Thermal Korea GaN ContactMode Cell Melt Spain Scanning_Thermal_Microscopy frequency_modulation Optoelectonics hetero_structure SolarCell ForceVolume Organic Pyroelectric hard_disk Crystal flakes H-BN SingleLayer