Supporting Information

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Fig. 8. Sensitivity of the three-parameters fits. The solid line in each graph has been calculated by using the values obtained by fitting the scattered intensity data for an adsorbed sample of di-C₁₈-PC at 51.5° (filled circles, shown for comparison): U'' = 10⁹ J·m^-4, g = 4 × 10^-4 J·m^-2, k = 1.2 × 10^-19 J (see tables). Broken lines correspond to the modification of one parameter. (Top) Two experimentally encountered values of k = 2 × 10^-19 J (long dashes) and 10 × 10^-19 J (short dashes). (Middle) Typical range of values for g = 10^-4 J·m^-2 (long dashes) and 10 × 10^-4 J·m^-2 (short dashes). (Bottom) U'' = 10¹⁰ J·m^-4 (long dashes) and 10¹³ J·m^-4 (short dashes), corresponding to the extremes of the expected range of values.

Fig. 9. Ripple phase. The scattering curve is calculated for the ripple shape given in Inset with a peak-to-peak distance L = 90 nm, a peak-to-well distance L₁ = 40 nm, and a peak-to-well amplitude equal to 0.2 nm. Note the peak in the scattering reflecting the periodicity of the ripple.