2-vinylpyridine conductive NUS Sadowski Pores MembraneFilter align PANI Steps Boundary Korea aluminum_nitride Fiber HexacontaneFilm Piranha ConductiveAFM Cobalt-dopedIronOxide PolymerBlend Heat temp Pore SrO HafniumDioxide Ni81Fe19 2d_materials Solution SiWafer University_of_Regensburg NUSNNI AnodizedAluminumOxide ContactMode PolyvinylAcetate Typhimurium NeodymiumMagnets Thermal