Transparent EPFL Dr.JurekSadowski PetruPoni MechanicalProperties YszSubstrate LDPE LateralPFM Semiconductor exfoliate PetruPoni_Institute Bmp DataStorage Butterfly IMT_Bucharest BTO Bacteria cannabinoid NUS Lattice P3HT AdhesionForce CrystalGrowing Nanofiber piezoelectric force microscopy Copper biocompatible Oxidation HumanHair GaN Dopped mfm_amplitude Wonseok Regensburg FuelCell