PhaseImaging self-assembled_monolayer CHRYSALIS_INC Materials Bio Memory DataStorage Worcester_Polytechnic_Institute Subhajjit Electrode temp KAIST Terrace semifluorinated_alkane Silver UTEM Domain Lateral_Force_Microscopy CNT Graphene PVA Conducting molecular_self_assembly tip_bias_mode Adhesion Vortex Wonseok Polyurethane Heat AEAPDES STO ULCA HiVacuum PtfeMembrane Non-ContactMode