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- W2313651808 abstract "Lyotropic cholesteric liquid crystalline phases were prepared by doping the quaternary mixture of potassium laurate (KL)/potassium sulfate (K2SO4)/alcohol (n–OH)/water with the chiral agent brucine. Different long-chain alcohols whose alkyl chains (n) vary from 8 (1-octanol) to 16 (1-hexadecanol) were used. The cholesteric uniaxial to cholesteric biaxial phase transitions were investigated by measuring the birefringences via polarizing optical microscopy, and the phase diagram was constructed as a function of the alkyl chain length of the alcohols. Alcohols with 9 ≤ n ≤ 12 presented the three cholesteric phases (cholesteric discotic—ChD, cholesteric biaxial—ChB, and cholesteric calamitic—ChC). The ChD-to-ChB transition was shown to be continuous, with a bare correlation length bigger than the typical micellar dimensions. Mixtures with n = 8 and n = 13 showed a first-order phase transition between the ChD and the ChC phases, without the presence of the ChB phase in between. These results are interpreted in terms of the nanosegregation of the alcohol molecules in the micelles with respect to the main amphiphiles molecules." @default.
- W2313651808 created "2016-06-24" @default.
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- W2313651808 date "2013-01-03" @default.
- W2313651808 modified "2023-10-01" @default.
- W2313651808 title "Effect of Alkyl Chain Length of Alcohols on Cholesteric Uniaxial to Cholesteric Biaxial Phase Transitions in a Potassium Laurate/Alcohol/Potassium Sulfate/Water/Brucine Lyotropic Mixture: Evidence of a First-Order Phase Transition" @default.
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- W2313651808 doi "https://doi.org/10.1021/jp310981d" @default.
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