Ca10(PO4)6(OH)2 Polystyrene thermoplastic_elastomers Composite ferromagnetic Polytetrafluoroethylene StrontiumTitanate UnivCollegeLondon IndiumTinOxide Permalloy SurfaceOxidation SiliconOxide self_assembly TPU SAM Modulus PUR Ananth Electronics PinpointPFM HBN FrictionalForce solar_cell LowDensityPolyethylene Kevlar Bmp Pinpoint BiFeO3 Floppy Inorganic_Compound Magnetostrictive Mechanical&nanotechnology MBE TungstenDeposition Lateral_Force_Microscopy