Publications
(* Corresponding author)
33. Properties of the uniaxial and biaxial nematic phases of the dodecyltrimethylammonium bromide/1-dodecanol/water lyotropic mixture including azo dye and drug molecules
Erol Akpinar*, Merve Tabak, Dennys Reis, Antonio Martins Figueiredo Neto
Phase Transitions, 97(1-2), 66-86, 2024.
https://www.tandfonline.com/doi/full/10.1080/01411594.2023.2284162
32. A new approach to the textural interpretation of magnetically aligned nematic and cholesteric lyotropic mesophases by using plate-lambda accessory
Danilo D. Luders, Erol Akpinar, M. L. G. Pereira and N. G. C. Astrath
Phase Transitions, 97(3), 171-191, 2024.
https://www.tandfonline.com/doi/full/10.1080/01411594.2023.2301469
31. A new interpretation of the optical interference figures observed in a lyotropic biaxial nematic phase for a ternary mixture of DTMABr, 1-DDeOH and H2O
Danilo D. Luders, Erol Akpinar, Newller M. Kimura
Journal of Molecular Liquids, 366, 120108, 2022.
https://doi.org/10.1016/j.molliq.2022.120108
30. Gemini surfactant behavior of conventional surfactant dodecyltrimethylammonium bromide with anionic azo dye Sunset Yellow in aqueous solutions
Erol Akpinar*, Nazli Uygur, Gokhan Topcu, Oleg D. Lavrentovich, Antonio Martins Figueiredo Neto
Journal of Molecular Liquids, 360, 119556, 2022.
https://doi.org/10.1016/j.molliq.2022.119556
29. Effect of the surfactant head-group size dependence of the dye-surfactant interactions on the lyotropic uniaxial to biaxial nematic phase transitions
Erol Akpinar*, Nazli Uygur, Oznur Demir Ordu, Dennys Reis, Antonio Martins Figueiredo Neto
Journal of Molecular Liquids, 332, 115842, 2021.
https://www.sciencedirect.com/science/article/pii/S0167732221005675
28. Effect of the anionic azo dye Sunset Yellow in lyotropic mixtures with uniaxial and biaxial nematic phases
Erol Akpinar*, Gokhan Topcu, Dennys Reis and Antonio Martins Figueiredo Neto
Journal of Molecular Liquids, 318, 114010, 2020.
https://www.sciencedirect.com/science/article/pii/S0167732220335844
27. Effect of surfactant alkyl chain length on lyotropic uniaxial to biaxial cholesteric phase transitions
Erol Akpinar*, Nazli Uygur, Seda Uyanik and Antonio Martins Figueiredo Neto
European Physical Journal E, 42(9), 128:1-6, 2019.
https://link.springer.com/article/10.1140/epje/i2019-11893-8
26. Effect of head-group size of some tetradecylalkylammonium bromide surfactants on obtaining the lyotropic biaxial nematic phase
Erol Akpinar*, Emre Guner, Oznur Demir Ordu and Antonio Martins Figueiredo Neto
European Physical Journal E, 42(4), 44:1-8, 2019.
25. Experimental conditions for the stabilization of the lyotropic biaxial nematic mesophase
Erol Akpinar and Antonio Martins Figueiredo Neto
Crystals, 9(3), 158(1-17), 2019.
https://www.mdpi.com/2073-4352/9/3/158
24. Comparison between lyotropic cholesteric phase behavior with partly fluorinated surfactants and their exact hydrogenated counterparts
Erol Akpinar*, Sinan Yurdakul and Antonio Martins Figueiredo Neto
Journal of Molecular Liquids, 259, 239-248, 2018.
https://www.sciencedirect.com/science/article/pii/S0167732217362190
23. A survey on the phase diagram of the system sodium dodecyl sulphate/1-decanol /D2O concerning an eventual coexistence of uniaxial nematic phases
Arnaldo Oliveira-Filho, Erol Akpinar, Dennys Reis and Antonio Martins Figueiredo Neto
Liquid Crystals, 45 (4), 475-484, 2018.
https://www.tandfonline.com/doi/full/10.1080/02678292.2017.1347292
22. Effect of the surfactant alkyl chain length on the stabilization of lyotropic nematic phases
Erol Akpinar*, Cihan Canioz, Meric Turkmen, Dennys Reis and Antonio Martins Figueiredo Neto
Liquid Crystals, 45 (2), 219-229, 2018.
https://www.tandfonline.com/doi/full/10.1080/02678292.2017.1309698
21. Effect of dopant structure on birefringences and symmetric tensor invariants of lyotropic nematic phases
Erol Akpinar
CBU Journal of Science, 14 (2), 229-235, 2018.
http://dergipark.gov.tr/cbayarfbe/issue/37847/403800
20. Comments on the stabilization of the biaxial nematic phase in lyotropic liquid crystals
Dennys Reis, Erol Akpinar and Antonio Martins Figueiredo Neto
Molecular Crystals Liquid Crystals, 657, 6-10, 2017.
http://www.tandfonline.com/doi/full/10.1080/15421406.2017.1402584
19. On the coexistence of uniaxial nematic phases in the lyotropic mixture sodium dodecyl sulphate/1-decanol/D2O
Arnaldo Oliveira-Filho, Erol Akpinar, Dennys Reis and Antonio Martins Figueiredo Neto
Molecular Crystals Liquid Crystals, 657, 1-5, 2017.
http://www.tandfonline.com/doi/full/10.1080/15421406.2017.1402579
18. Role of kosmotrope-chaotrope interactions at micelle surfaces on the stabilization of lyotropic nematic phases
Erol Akpinar*, Meric Turkmen, Cihan Canioz and Antonio Martins Figueiredo Neto
European Physical Journal E: Soft Matter and Biological Physics, 39 (11), 107 (1-16), 2016
http://link.springer.com/article/10.1140/epje/i2016-16107-5
17. Effect of the presence of strong and weak electrolytes on the existence of uniaxial and biaxial nematic phases in lyotropic mixtures
Erol Akpinar*, Kemal Otluoglu, Meric Turkmen, Cihan Canioz, Dennys Reis and Antonio Martins Figueiredo Neto
Liquid Crystals, 43 (11), 1693-1708, 2016
http://www.tandfonline.com/doi/full/10.1080/02678292.2016.1194491
16. Effect of Hofmeister anions on the existence of the biaxial nematic phase in lyotropic mixtures of dodecyltrimethylammonium bromide/sodium salt/1-dodecanol/water
Erol Akpinar*, Dennys Reis and Antonio Martins Figueiredo Neto
Liquid Crystals, 42 (7), 973-981, 2015
http://www.tandfonline.com/doi/full/10.1080/02678292.2015.1011717#.VW1Cac_tmko
15. Shear viscosity measurements and rheological properties of ternary and quaternary lyotropic liquid crystals in the discotic and the calamitic nematic phases
Celso L.S. Risi, Antonio Martins Figueiredo Neto, P.R.G. Fernandes, A.R. Sampaio, Erol Akpinar and Marcus B.L. Santos
Rheologica Acta, 54 (6), 529-543, 2015
http://link.springer.com/article/10.1007/s00397-015-0850-2
14. Interpretation of different molecular packing in the micelles of lyotropic nematic and cholesteric phases via mass density measurements
Erol Akpinar*, Frank Giesselmann and Mahmut Acimis
Journal of Molecular Liquids, 200, 354-360, 2014
http://www.sciencedirect.com/science/article/pii/S0167732214005236
13. New lyotropic mixtures with non-chiral N-acylamino acid surfactants presenting the biaxial nematic phase investigated by laser conoscopy, polarized optical microscopy, and X-ray diffraction
Erol Akpinar*, Dennys Reis, Muhammet Yildirim and Antonio Martins Figueiredo Neto
Materials, 7(6),4132-4147, 2014
http://www.mdpi.com/1996-1944/7/6/4132
12. Anomalous behavior in the crossover between the negative and positive biaxial nematic mesophases in a lyotropic liquid crystal
Erol Akpinar*, Dennys Reis and Antonio Martins Figueiredo Neto
ChemPhysChem, 15 (7), 1463-1469, 2014
http://onlinelibrary.wiley.com/doi/10.1002/cphc.201301003/abstract
11. Contributions of intermicellar distance, micelle volume and screw angle to the temperature dependence of helical pitch in the intrinsic lyotropic cholesteric phases
Erol Akpinar*, Frank Giesselmann and Mahmut Acimis
Journal of Molecular Liquids, 191, 20-28, 2014
http://www.sciencedirect.com/science/article/pii/S0167732213003966
10. Dynamic light scattering and viscosity measurements in a ternary and quaternary discotic lyotropic nematic liquid crystal: tuning the backflow with salt
Celso L.S. Risi, Antonio Martins Figueiredo Neto,Erol Akpinarand Marcus B.L. Santos
Physical Review E, 88 (2), 022506, 1-10, 2013
http://pre.aps.org/abstract/PRE/v88/i2/e022506
9. Effect of micelle size and intermicellar distance on the chirality transfer in the intrinsic lyotropic cholesteric phases
Erol Akpinar*, Frank Giesselmann and Mahmut Acimis
Liquid Crystals, 40 (9), 1183-1194, 2013
http://www.tandfonline.com/doi/full/10.1080/02678292.2013.807941#.UgDoTpLZbCk
8. Effect of Alkyl Chain Length of Alcohols on Cholesteric Uniaxial-to-Cholesteric Biaxial Phase Transitions in a Potassium laurate/alcohol/K2SO4/water/brucine Lyotropic Mixture: Evidence of a First-Order Phase Transition
Dennys Reis, Erol Akpinar and Antonio Martins Figueiredo Neto
Journal of Physical Chemistry B, 117 (3), 942-948, 2013
http://pubs.acs.org/doi/abs/10.1021/jp310981d
7. Study of the Cholesteric-to-Cholesteric Phase Transitions on the Lyotropic Mixture of KL/K2SO4/1-undecanol/water/brucine Presenting the Cholesteric Biaxial Phase
Erol Akpinar*, Dennys Reis and Antonio Martins Figueiredo Neto
Molecular Crystals Liquid Crystals, 576 (1), 98-105, 2013
http://www.tandfonline.com/doi/full/10.1080/15421406.2013.789708
6. Investigation of the Interaction of Alkali Ions with Surfactant Head Groups for the Formation of Lyotropic Biaxial Nematic Phase via Optical Birefringence Measurements
Erol Akpinar,Dennys Reis and Antonio Martins Figueiredo Neto
Proc. of Soc. Photo-Opt. Inst. Eng. (SPIE), 8642, art. no. 864203, 2013
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1661620
5. Lyotropic Mixture Made of Potassium Laurate/1-undecanol/K2SO4/water Presenting High Birefringences and Large Biaxial Nematic Phase Domain: A Laser Conoscopy Study
Erol Akpinar,Dennys Reis and Antonio Martins Figueiredo Neto
European Physical Journal E: Soft Matter and Biological Physics, 35, 50 (1-9), 2012
http://link.springer.com/article/10.1140%2Fepje%2Fi2012-12050-9
4. Effect of Alkyl Chain Length of Alcohols on Nematic Uniaxial-to-Biaxial Phase Transitions in a Potassium laurate/alcohol/K2SO4/water Lyotropic Mixture
Erol Akpinar, Dennys Reis and Antonio Martins Figueiredo Neto
Liquid Crystals, 39 (7), 881-888, 2012
http://www.tandfonline.com/doi/full/10.1080/02678292.2012.686637
3. Mass Density Measurements as a Tool to Distinguish Between Micelle Size and Shape in Nematic and Chiral Nematic Phases
Mahmut Acimis and Erol Akpinar
Physical Chemistry Chemical Physics, 5, 4197-4203, 2003
http://pubs.rsc.org/en/content/articlelanding/2003/cp/b304693a
2. Strange Mass Density Behaviour of a Micellar Chiral Nematic Phase Composed of an Amphiphilic Racemic Mixture and its L-enantiomer
Erol Akpinar, Mahmut Acimis and Cigdem Ocak
Physical Chemistry Chemical Physics, 3, 645-646, 2001
http://pubs.rsc.org/en/content/articlelanding/2001/cp/b100373i
1. Effects of Salts and Structure of Chiral Dopants on the Induced Pitch from Micellar Nematic Phases
Cigdem Ocak, Mahmut Acimis, Erol Akpinar and Ayse Gok
Physical Chemistry Chemical Physics, 2, 5703-5707, 2000
http://pubs.rsc.org/en/content/articlelanding/2000/cp/b006589g