H-BN SingleLayer flakes Pyroelectric polyvinyl acetate nanobar Hysteresys HighAspect GranadaUniv CrAu OxideLayer HexagonalBN Annealed NTU PhthalocyaninePraseodymium Hole IMT_Bucharest SmallScan TriGlycineSulphate Fujian Floppy CastIron Nanofiber ForceVolumeMapping Composition EFM Chungnam_National_University blended polymers ThinFilm EPFL PVAP3HT Trench LightEmiting food MeltingPoint