Research Article
Hysteresis of Isotherms of Mixed Monolayers of N-Octadecyl-N′-phenylthiourea and Stearic Acid at Air/Water Interface
Table 1
Limiting area/molecule of OPT/SA premixed monolayer for coinciding curves.
| Mole fraction of OPT : SA in the spreading mixtures | Area/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 : 0.112 | 5.69 | 50.6 | 25.3 | 0.693 : 0.307 | 14.8 | 48.1 | 24.1 | 0.601 : 0.399 | 17.1 | 42.7 | 21.4 | 0.504 : 0.496 | 19.0 | 38.4 | 19.2 | 0.372 : 0.628 | 19.9 | 31.8 | 19.9 | 0.220 : 0.780 | 19.7 | 25.2 | 19.7 |
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