Hafnium_dioxide Cross-section self_healing biocompatible Tapping TyphimuriumBiofilm Pattern NUS NUS_Physics polymeric_arrays PolyStylene Sperm Gallium block_copolymer HighResolution Hair ito_film DeflectionOptics Workfunction Optical FFM PhaseImaging Composite temperature_control SFAs Patterns phase_change STO temp_control PDMS PhaseChange Hafnia Ceramics Biofilm cooling