PetruPoni Sulfur lithography Ni81Fe19 dichalcogenide thermal_property Solution Graphite Friction BlockCopolymer chemical_compound ConductiveAFM C_AFM Oxide StyreneBeads LDPE Tin sulfide ConductingPolymer AtomicLayer MoirePattern contact ForceDistanceSpectroscopy Alloy Floppy Treatment semifluorinated_alkane block_copolymer self-assembly NiFe Filter NCM Beads Composition India Electical&Electronics