Ni81Fe19 KelvinProbeForceMicroscopy TemperatureControlledAFM ring shape Temperature Phase EFMAmplitude GlassTemp Polyvinylidene CalciumHydroxyapatite Indium_tin_oxide Ecoli TCS rubber LiquidCell sputter fluoroaalkane Fiber strontiu_titanate STO Fe_film Composite Gallium Ram DataStorage TriGlycineSulphate OrganicCompound SrTiO3 self-assembled_monolayer Spain C36H74 PANI kelvin probe force microscopy Wildtype Tungsten_disulfide