Sapphire StrontiuTitanate Oxide BFO NUS_NNI_Nanocore layers Hafnium_dioxide ContactModeDot phase_change KAIST Calcite PrCurve Polydimethylsiloxane UnivOfMaryland non_contact Hydroxyapatite Polyvinylidene Thermoplastic_polyurethane OxideLayer polyvinyl acetate BismuthFerrite STM Styrene nanobar epitaxy Etch Au111 Composition HumanHair Hexatriacontane Mosfet Non-ContactMode HfO2 FrictionForce Vortex