self_healing SmalScan Annealing SThM LiquidCell PolyvinylideneFluoride Melt Floppy Biofilm SKKU neodymium_magnets Protein Heat PolymerPatterns self-assembly Polyvinylidene_fluoride TappingMode lithography LiquidImaging Vac MESA structure bias_mode StrontiumTitanate Alkane H-BN CuParticle SiliconOxide Subhajjit mechanical_property Pattern SICM Polyimide HBN margarine Grain