Wang Piranha University_of_Regensburg PECurve DomainSwitching PolymerPatterns ContactModeDots Sperm Defects MagneticForce Fendb Yttria_stabilized_Zirconia fluoroaalkane mechanical property small_scan WS2 MBE Mechinical BismuthFerrite ConductingPolymer Leakage nanomechanical Pyroelectric Hydroxyapatite AM-KPFM Memory PvdfFilm Wafer Tape Polyaniline Hafnia Mechanical Permalloy Sapphire LaAlO3