LiquidImaging fluorocarbon BiFeO3 TPU OpticalElement FM_KPFM Ito Electronics Annealing Self-assembledMonolayer NiFe Polyethylene Pinpoint PFM PhthalocyaninePraseodymium temp NUS ThinFilm CuParticle non_contact Melt Calcite domain_switching Hexatriacontane BlockCopolymer Optoelectonics HexacontaneFilm GranadaUniv NtuEee Hexylthiophene Sidewall align SolarCell CaMnO3 atomic_steps AM-KPFM