hydrocarbon SolarCell CVD HBN Boundary cross section PFM Floppy NUS single_layer PVA MechanicalProperty ElectroChemical Sic SThM PolyvinylideneFluoride frequency_modulation NUS_Physics Phthalocyanine self-assembly Cross-section Scratch MembraneFilter heterojunctions HiVacuum Subhajjit StrontiumTitanate Thermoplastic_polyurethane Foil Worcester_Polytechnic_Institute multi_layer Materials Ferroelectric hard_disk Polystyrene