mechanical property Styrene Platinum Nickel HOPG Non-ContactMode Solution KPFM CrAu Blend Reading CP-AFM Ferrite Current piezoelectric force microscopy CopperFoil Carbon Hydroxyapatite Global_Comm molecule Change FrictionForce CaMnO3 Friction Typhimurium Chromium Au111 ReflexLens sputter Deposition Ucl FM_KPFM AnodizedAluminumOxide Spincast self-assembly