Figure 2.

Small-angle x-ray scattering (SAXS) and neutron diffraction (ND) experiments. (A) A representative 2D SAXS pattern featuring first- and second-order Bragg peaks in the form of concentric rings is shown. (B) A radial plot of the integration in the azimuthal direction of SAXS pattern with first- and second-order Bragg peaks is shown. Inset: WAXS region exhibiting peaks only for exceptional samples in the chain-ordered L_β phase (here: Psyc-sat; f_gly = 1.0; 50°C; solid red curve). For typical samples in the fluid L_α phase (here: LacCer-sat; f_gly = 0.1 in DMPC; 50°C; dashed green curve), no WAXS peaks are observed. (C) A schematic illustration of the experimental geometry for ND in top view is shown. (D) A typical ND reciprocal space map, S(q_z, q_||), featuring three Bragg sheet orders (here: DGDG-sat; f_gly = 0.5 in DMPC; 50°C, h_rel = 95%), is shown. Plot on the right: specular intensity (q_|| ≈ 0) as a function of q_z. To see this figure in color, go online.