Platinum EFMAmplitude layers BiasMode OpticalWaveguide LiBattery molecule LightEmission Photovoltaics Conductive AFM PANI self-assembly cross section Floppy Perovskite Vinylpyridine Non-ContactMode Global_Comm Domain Leakage Lattice Gong molecular_beam FFM Topography Worcester_Polytechnic_Institute ElectrostaticForceMicroscopy MfmAmplitude Scanning_Thermal_Microscopy Lift Battery Phase Foil UnivCollegeLondon nanomechanical