The identified peptide sequences are shown in Table . Only one dominant peptide sequence was isolated for each MON system after three panning rounds, suggesting high selectivity towards that specific peptide. In contrast, Fan et. al. reported 2-3 high affinity binding peptides after the final panning round when using phage display against MOFs. One possible explanation for this difference is that the ultrathin nature of the 2D-MONs means there is essentially just one type of surface available for binding, whereas 3D-MOFs offer multiple faceted surfaces.