CaMnO3 Nanofiber ThermalProperties VerticalPFM polymeric_arrays NUS_Physics PVA Polytetrafluoroethylene TemperatureControlledAFM MechanicalProperty StrontiuTitanate Metal-organicComplex Led molecules PhthalocyaninePraseodymium molecular_beam Protein IRDetector Polarization temperature controller AFM align WS2 Melt ScanningKelvinProbeMicroscopy ContactMode Roughness solar_cell Electrode 2-vinylpyridine exfoliate pinpoint mode Defect Annealed polyvinyl acetate Techcomp