SiWafer fluoroaalkane Permalloy Temasek_Lab Polypropylene Annealed CP-AFM Scanning_Thermal_Microscopy piezoelectric force microscopy Sulfur hetero_structure Ceramics NiFe Dopped MonoLayer Steps Mobile vertical_PFM Adhesion semifluorinated_alkane molecules FloppyDisk HiVacuum P3HT CHRYSALIS_INC Austenite light_emission SelfAssembly bias_mode Change temp_control fluorocarbon alkanes BCZT WWafer