Table 1: Limiting area/molecule of OPT/SA premixed monolayer for coinciding curves.

Mole fraction of OPT : SA in the spreading mixturesArea/total deposited OPT and SA molecules (Å2)Area/SA molecules added (Å2)Area/molecule remaining in monolayer, assuming a 1 : 1 complex plus any excess SA (Å2)

0.888 : 0.1125.6950.625.3
0.693 : 0.30714.848.124.1
0.601 : 0.39917.142.721.4
0.504 : 0.49619.038.419.2
0.372 : 0.62819.931.819.9
0.220 : 0.78019.725.219.7