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. 2017 Aug 30;8:396. doi: 10.1038/s41467-017-00407-9

Fig. 3.

Fig. 3

Chemistry of model soil organic matter affects binding strengths to different minerals. Experiments were performed at pH 6 in 10 mM NaCl. a, b Mean rupture forces for interactions between self-assembled monolayers with various functional groups and a muscovite mica or b goethite. c Experimentally derived values for the binding free energy (ΔG b) from fitted dynamic force spectroscopy data. Values for fitting parameters can be found in Supplementary Table 1. Asterisk: The value for the methyl group interacting with goethite is approximate, as the force was close to the detection limit of the experiment