MembraneFilter cannabinoid Cell EFMAmplitude Magnetic Force Microscopy Permalloy Pores Polyvinylidene Tungsten Glass CntFilm ring shape conductive Dr.JurekSadowski DeoxyribonucleicAcid MultiferroicMaterials layers FM_SKPM YszSubstrate Conductance HfO2 Piezoresponse HexacontaneFilm Sperm Floppy NanoLithography strontiu_titanate light_emitting Etch Materials ContactModeDot Mfm semifluorinated_alkane ReflexLens Epoxy