Fig. 6.

Results of a study testing the effect of reaction time on NaSS film quality for films grafted from thiol (on gold) and amide ClSi (on titanium) ATRP initiators (Fig. 5). PC1 vs sample scores plots for NaSS films on gold using the thiol ATRP initiator (A), and on titanium using the amide ClSi ATRP initiator (B) for grafting reaction times up to 7 days. The corresponding loadings are in (C). Except for two improperly cleaned substrates, NaSS film quality appears constant with reaction time on gold, while quality and reproducibility decreases with increasing reaction time when grafted from the amide ClSi initiator on titanium.