PS_PVAC Fiber NUS_Physics Scratch Hydroxyapatite University_of_Regensburg HOPG molecules Yttria_stabilized_Zirconia UnivCollegeLondon BariumTitanate Friction Growth Fendb PhaseImaging SrTiO3 TungstenThinFilmDeposition CrossSection AtomicSteps SKKU Wang Epoxy Change Dopped HexagonalBoronNitride ULCA MeltingPoint Gold Logo DNA LogAmplifier Phenanthrene BismuthFerrite Regensburg LiIonBattery