Figure 3

(a–e) Calcite crystal morphologies induced by 51 μM peptoid solutions of: (a) Pep-6, (b) Pep-7, (c) Pep-8, (d) Pep-9 and (e) Pep-10. (f) Reverse phase HPLC data shows the relative peptoid hydrophobicities, where longer retention time indicates higher hydrophobicity (5–95% CH3CN in H2O at 1 mL/min flow rate; detailed HPLC conditions are provided in the Supporting Information).