margarine LowDensityPolyethylene InsulatorFilm semifluorinated_alkane CrystalGrowing contact Chungnam_National_University plastic ScanningTunnelingMicroscopy Gong Zagreb PrCurve Vanadate Ptfe SiliconCrystal FrictionalForceMicroscopy TappingMode SThM Dopped block_copolymer AIN PolyimideFilm thermal_conductivity Solar Beads Sphere DiffractiveOpticalElements FrequencyModulation BiasMode ScratchMode Laser Neodymium PolyvinylAcetate StyreneBeads Jason