tip_bias_mode Alkane NUS Hexylthiophene molecular_self_assembly Iron Magnets Hysteresys Composition PolyimideFilm non_contact contact Yeditepe_University Ptfe Crystal Thermoplastic_polyurethane Worcester_Polytechnic_Institute TemperatureControl Solution BismuthVanadate SmallScan Implant H-BN HACrystal MoS2 P3HT Switching multi_layer Techcomp ElectroDeposition Conducting BiFeO3 Roughness silicon_carbide BiVO4