Figure 2.

(A and B) Temperature-dependent pressure–area isotherms of an N-stearoyl-threonine monolayer with x_D = 0.9 at compression (A) and at expansion (B). The hysteresis between compression and decompression curves is clearly visible. (C) The difference in transition pressure between compression and expansion, ΔΠ, as a function of x_D. The values were taken at A_a = 40 Ų and averaged over four temperatures. The error bars are the standard derivation of the data points at different temperatures. The dotted straight line represents a linear fit to the data points.