Abstract
The Raman Spectra of Blodgett-Langmuir multilayer assemblies made from behenic acid, barium behenate and barium cis-13 erucate are reported. In particular, the peak height intensity ratio of the hydrocarbon chain methylene CH stretch Raman bands, I 2890 I 2850 , for each multilayer assembly is compared to that of phosphatidylcholine in powders and water dispersions as well as to samples of crystalline hydrocarbon chains. It is found that the fatty acid multilayers are more ordered than the phospholipid samples but less ordered than the crystalline samples. It is suggested that Blodgett-Langmuir multilayer assemblies of lipid might be a useful reference in quantitative studies of packing order in lipid phases.
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