self_assembly China Subhajjit Permalloy tip_bias_mode BTO lift_mode FFM PVA light_emitting Polyvinylidene_fluoride Adhesive Pinpoint TungstenDeposition kelvin probe force microscopy SmallScan GalliumPhosphide hard_disk_media RedBloodCell cannabidiol FloppyDisk Optical Friction OrganicSemiconductor Bacteria Change HanyangUniv TemperatureControllerAFM KPFM Resistance Tungsten_disulfide University_of_Regensburg Ferroelectric Dopped PS_LDPE