Fig. 5. Left: The circles show experimental Raman spectra for the DOPC/DPPC/Chol bilayers taken at 100 K for the compositions A, B, and C of the triangle vertexes shown in Fig. 1. Data are shifted upwards for convenience. The solid lines drawn through the experimental points are fits by a sum of Loretzians (cf.Fig. 2). The insert shows the Lorentzians describing the peak between 13 and 16 cm−1, for the A, B and C compositions. Right: the peak weights a, b and c found from eqn (4), as a function of Chol concentration.
