Fig. 8.

(a) IR center of mass frequency for the ν_symCD₂ of SDS-d₂₅ in aqueous solution and in the SC region of porcine and human skin treated with SDS-d₂₅ for 3, 24, and 40 h at room temperature (black) and 34 °C (gray). We note that the error bars (standard deviation) do not wholly reflect lack of precision in the measurements but rather predominantly arise from heterogeneity in the skin. (b) Image planes showing the center of mass frequency of ν_symCD₂ in both porcine and human skin after treatment for 3, 24 and 40 h at 34 °C. The average ν_symCD₂ frequency for the micellar SDS-d₂₅ solution is marked as the black line on the scale bar.