self-assembly kelvin probe force microscopy Photovoltaics NCM Worcester_Polytechnic_Institute India Nanofiber Self-assembledMonolayer lithography MonoLayer semifluorinated_alkane GlassTemperature Tapping Phase Corrosion Electrode Oxidation Varistor molecular_self_assembly atomic_layer ForceDistanceSpectroscopy Spain SurfaceOxidation Ecoli C36H74 TipBiasMode Polypropylene SrO chemical_compound OrganicSemiconductor Annealed Organic Non-ContactMode Forevision Morphology