light_emitting StainlessSteel LowDensityPolyethylene PDMS medical PetruPoni fe_nd_b temp_control SFAs hetero_structure Conductive AFM silicon_oxide Fujian Worcester_Polytechnic_Institute BiVO4 MechanicalProperty PvdfBead fluoroalkane Treatment Ni81Fe19 Implant OrganicSemiconductor Electrical&Electronics Butterfly Epoxy CP-AFM Fendb TPU Deposition Friction Alloy Insulator Etch mechanical_property Temasek_Lab