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Erol Akpinar

Researcher at Abant Izzet Baysal University

Publications -  33
Citations -  356

Erol Akpinar is an academic researcher from Abant Izzet Baysal University. The author has contributed to research in topics: Liquid crystal & Lyotropic. The author has an hindex of 10, co-authored 31 publications receiving 299 citations.

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Effect of alkyl chain length of alcohols on nematic uniaxial-to-biaxial phase transitions in a potassium laurate/alcohol/K2SO4/water lyotropic mixture

TL;DR: In this article, the biaxial nematic phase domain is present in a window of values of, where is the number of carbon atoms in the alkyl chain of KL.
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Lyotropic mixture made of potassium laurate/1-undecanol/K2SO4/water presenting high birefringences and large biaxial nematic phase domain: a laser conoscopy study

TL;DR: The behavior of the symmetric tensor order parameter invariants σ3 and σ2 calculated from the measured optical birefringences supports that the uniaxial-to-biaxial transitions are of second order, described by a mean-field theory.
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Effect of the alkyl chain length of the alcohols on the nematic uniaxial-to-biaxial phase transitions in the potassium laurate/alcohol/K2SO4/water lyotropic mixture

TL;DR: In this paper, the biaxial nematic phase domain is present in a window of values of n = nKL \pm 2, where n KL = 11 is the number of carbon atoms in the alkyl chain of KL, and the alcohol molecules tend to segregate in the micelles in a way that depends on the relative value of n with respect to n kL.
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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.

TL;DR: Lyotropic cholesteric liquid crystalline phases were prepared by doping the quaternary mixture of potassium laurate/potassium sulfate/water with the chiral agent brucine and interpreted in terms of the nanosegregation of the alcohol molecules in the micelles with respect to the main amphiphiles molecules.
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Effect of the presence of strong and weak electrolytes on the existence of uniaxial and biaxial nematic phases in lyotropic mixtures

TL;DR: In this paper, a mixture of potassium laurate/decanol/water presenting only the uniaxial nematic calamitic phase was doped with one strong (potassium chloride, KCl) and 11 weak electrolytes with phenyl-rings.