Flake Switching Polyurethane Memory NanoLithography membrane Forevision LiftHeight YszSubstrate Phosphide NUS Titanate Adhesive CuParticle Wang bias_mode SmallScan Pattern Stiffness IndiumTinOxide molecular_self_assembly Optical plastic CuSubstrate oxide_layer PhaseChange Hexatriacontane Friction ring shape GaP block_copolymer Granada AmplitudeModulation electrospinning Materials