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Extracting local surface charges and charge regulation behavior from atomic force microscopy measurements at heterogeneous solid-electrolyte interfaces
We present a method to determine the local surface charge of solid-liquid interfaces from Atomic Force Microscopy (AFM) measurements that takes into account shifts of the adsorption/desorption equilibria of protons and ions as the cantilever tip approaches the sample. We recorded AFM force distance curves in dynamic mode with sharp tips on heterogeneous silica surfaces partially covered by gibbsite nanoparticles immersed in an aqueous electrolyte with variable concentrations of dissolved NaCldoi:10.1039/c5nr05261k pmid:26377347 fatcat:fkkxfc6qkndcdhzft4w4refjei