Polyimide SetpointMode molecular_beam AtomicSteps ThermalProperties AM-KPFM Chungnam_National_University ring shape Etch MolybdenumDisulfide ScratchMode self_assembly Domain HDD KAIST SKKU cross section Vinylpyridine Vanadate Electical&Electronics Wang multi_layer Boron TungstenThinFilmDeposition Film LDPE PyroelectricDetector InsulatorFilm Sulfur Edwin semifluorinated alkane StainlessSteel Sadowski BaTiO3 Aluminum