Fig. 2: Comparison of chiral molecule effect with Fe-doping effect.

a Chiral molecular functionalization enhancement on NiO_x islands in Fe-free, NiO_x islands in KOH (unpurified) and NiFeO_x islands in KOH (unpurified). b Chiral molecular functionalization enhancement at Ni₉FeO_x deposited on Ni foam. Source data are provided as a Source Data file.