{"id":97,"date":"2015-12-21T15:23:02","date_gmt":"2015-12-21T15:23:02","guid":{"rendered":"http:\/\/liquidcrystals.ibu.edu.tr\/?page_id=97"},"modified":"2025-12-15T21:50:19","modified_gmt":"2025-12-15T21:50:19","slug":"publications","status":"publish","type":"page","link":"http:\/\/liquidcrystals.ibu.edu.tr\/?page_id=97","title":{"rendered":"Publications"},"content":{"rendered":"

(* <\/strong>Corresponding author<\/strong>)<\/em><\/p>\n

36. Simulated interference colors from birefringence measurements in lyotropic
\ncalamitic nematic – biaxial nematic – discotic nematic phases<\/p>\n

Danilo D. Luders, Erol Akpinar<\/em><\/p>\n

European Physical Journal E, 48, 46 (1-9), 2025.<\/p>\n

https:\/\/link.springer.com\/article\/10.1140\/epje\/s10189-025-00510-6<\/a><\/p>\n

35. Structure and local ordering of a lyotropic nematic phase and its intrinsic cholesteric counterpart<\/p>\n

Angela R.N. Santisteban, Dennys Reis, Erol Akpinar<\/em>, Cristiano L.P. de Oliveira, Antonio M. F. Neto<\/p>\n

Liquid Crystals, 52 (9-10), 697-707, 2025<\/p>\n

https:\/\/doi.org\/10.1080\/02678292.2025.2512359<\/a><\/p>\n

34. Investigation of the relation between surfactant head group size and formation of different types of lyotropic structures in two surfactants\/dye systems<\/p>\n

Erol Akpinar*<\/em>, Baris Okuyan, Dennys Reis, Nazli Uygur, Antonio Martins Figueiredo Neto<\/p>\n

Journal of Molecular Liquids, 417, 126589, 2025.<\/p>\n

https:\/\/doi.org\/10.1016\/j.molliq.2024.126589<\/a><\/p>\n

33. Properties of the uniaxial and biaxial nematic phases of the dodecyltrimethylammonium bromide\/1-dodecanol\/water lyotropic mixture including azo dye and drug molecules<\/p>\n

Erol Akpinar*<\/em>, Merve Tabak, Dennys Reis, Antonio Martins Figueiredo Neto<\/p>\n

Phase Transitions, 97(1-2), 66-86, 2024.<\/p>\n

https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/01411594.2023.2284162<\/a><\/p>\n

32. A new approach to the textural interpretation of magnetically aligned nematic and cholesteric lyotropic mesophases by using plate-lambda accessory<\/p>\n

Danilo D. Luders, Erol Akpinar<\/em>, M. L. G. Pereira and N. G. C. Astrath<\/p>\n

Phase Transitions, 97(3), 171-191, 2024.<\/p>\n

https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/01411594.2023.2301469<\/a><\/p>\n

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<\/p>\n

Danilo D. Luders, Erol Akpinar<\/em>, Newller M. Kimura<\/p>\n

Journal of Molecular Liquids, 366, 120108, 2022.<\/p>\n

https:\/\/doi.org\/10.1016\/j.molliq.2022.120108<\/a><\/p>\n

30. Gemini surfactant behavior of conventional surfactant dodecyltrimethylammonium bromide with anionic azo dye Sunset Yellow in aqueous solutions<\/p>\n

Erol Akpinar*<\/em>, Nazli Uygur, Gokhan Topcu, Oleg D. Lavrentovich, Antonio Martins Figueiredo Neto<\/p>\n

Journal of Molecular Liquids, 360, 119556, 2022.<\/p>\n

https:\/\/doi.org\/10.1016\/j.molliq.2022.119556<\/a><\/p>\n

29. Effect of the surfactant head-group size dependence of the dye-surfactant interactions on the lyotropic uniaxial to biaxial nematic phase transitions<\/p>\n

Erol Akpinar*<\/em>, Nazli Uygur, Oznur Demir Ordu, Dennys Reis, Antonio Martins Figueiredo Neto<\/p>\n

Journal of Molecular Liquids, 332, 115842, 2021.<\/p>\n

https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167732221005675<\/a><\/p>\n

28. Effect of the anionic azo dye Sunset Yellow in lyotropic mixtures with uniaxial and biaxial nematic phases<\/p>\n

Erol Akpinar*<\/em>, Gokhan Topcu, Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Journal of Molecular Liquids, 318, 114010, 2020.<\/p>\n

https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167732220335844<\/a><\/p>\n

27. Effect of surfactant alkyl chain length on lyotropic uniaxial to biaxial cholesteric phase transitions<\/p>\n

Erol Akpinar*<\/em>, Nazli Uygur, Seda Uyanik and Antonio Martins Figueiredo Neto<\/p>\n

European Physical Journal E, 42(9), 128:1-6, 2019.<\/p>\n

https:\/\/link.springer.com\/article\/10.1140\/epje\/i2019-11893-8<\/a><\/p>\n

26. Effect of head-group size of some tetradecylalkylammonium bromide surfactants on obtaining the lyotropic biaxial nematic phase<\/p>\n

Erol Akpinar*<\/em>, Emre Guner, Oznur Demir Ordu and Antonio Martins Figueiredo Neto<\/p>\n

European Physical Journal E, 42(4), 44:1-8, 2019.<\/p>\n

https:\/\/epje.epj.org\/articles\/epje\/abs\/2019\/04\/10189_2019_Article_11806\/10189_2019_Article_11806.html<\/a><\/p>\n

25. Experimental conditions for the stabilization of the lyotropic biaxial nematic mesophase<\/p>\n

Erol Akpinar <\/em>and Antonio Martins Figueiredo Neto<\/p>\n

Crystals, 9(3), 158(1-17), 2019.<\/p>\n

https:\/\/www.mdpi.com\/2073-4352\/9\/3\/158<\/a><\/p>\n

24. Comparison between lyotropic cholesteric phase behavior with partly fluorinated surfactants and their exact hydrogenated counterparts<\/p>\n

Erol Akpinar*<\/em>, Sinan Yurdakul and Antonio Martins Figueiredo Neto<\/p>\n

Journal of Molecular Liquids, 259, 239-248, 2018.<\/p>\n

https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167732217362190<\/a><\/p>\n

23. A survey on the phase diagram of the system sodium dodecyl sulphate\/1-decanol \/D2<\/sub>O concerning an eventual coexistence of uniaxial nematic phases<\/p>\n

Arnaldo Oliveira-Filho, Erol Akpinar<\/em>, Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Liquid Crystals, 45 (4), 475-484, 2018.<\/p>\n

https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2017.1347292<\/a><\/p>\n

22. Effect of the surfactant alkyl chain length on the stabilization of lyotropic nematic phases<\/p>\n

Erol Akpinar*, <\/em>Cihan Canioz, Meric Turkmen, Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Liquid Crystals, 45 (2), 219-229, 2018.<\/p>\n

https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2017.1309698<\/a><\/p>\n

21. Effect of dopant structure on birefringences and symmetric tensor invariants of lyotropic nematic phases<\/p>\n

Erol Akpinar<\/em><\/p>\n

CBU Journal of Science, 14 (2), 229-235, 2018.<\/p>\n

http:\/\/dergipark.gov.tr\/cbayarfbe\/issue\/37847\/403800<\/a><\/p>\n

20. Comments on the stabilization of the biaxial nematic phase in lyotropic liquid crystals<\/p>\n

Dennys Reis, Erol Akpinar<\/em> and Antonio Martins Figueiredo Neto<\/p>\n

Molecular Crystals Liquid Crystals, 657, 6-10, 2017.<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15421406.2017.1402584<\/a><\/p>\n

19. On the coexistence of uniaxial nematic phases in the lyotropic mixture sodium dodecyl sulphate\/1-decanol\/D2<\/sub>O<\/p>\n

Arnaldo Oliveira-Filho, Erol Akpinar<\/em>, Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Molecular Crystals Liquid Crystals, 657, 1-5, 2017.<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15421406.2017.1402579<\/a><\/p>\n

18. Role of kosmotrope-chaotrope interactions at micelle surfaces on the stabilization of lyotropic nematic phases<\/p>\n

Erol Akpinar*, <\/em>Meric Turkmen, Cihan Canioz and Antonio Martins Figueiredo Neto<\/p>\n

European Physical Journal E: Soft Matter and Biological Physics, 39 (11), 107 (1-16), 2016<\/p>\n

http:\/\/link.springer.com\/article\/10.1140\/epje\/i2016-16107-5<\/a><\/p>\n

17. Effect of the presence of strong and weak electrolytes on the existence of uniaxial and biaxial nematic phases in lyotropic mixtures<\/p>\n

Erol Akpinar*, <\/em>Kemal Otluoglu, Meric Turkmen, Cihan Canioz, Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Liquid Crystals, 43 (11), 1693-1708<\/em>, 2016<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2016.1194491<\/a><\/p>\n

16. Effect of Hofmeister anions on the existence of the biaxial nematic phase in lyotropic mixtures of dodecyltrimethylammonium bromide\/sodium salt\/1-dodecanol\/water<\/p>\n

Erol Akpinar*, <\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Liquid Crystals, 42 (7), 973-981<\/em>, 2015<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2015.1011717#.VW1Cac_tmko<\/a><\/em><\/p>\n

15. Shear viscosity measurements and rheological properties of ternary and quaternary lyotropic liquid crystals in the discotic and the calamitic nematic phases<\/p>\n

Celso L.S. Risi, Antonio Martins Figueiredo Neto, P.R.G. Fernandes, A.R. Sampaio, Erol Akpinar <\/em>and Marcus B.L. Santos<\/p>\n

Rheologica Acta, 54 (6), 529-543<\/em>, 2015<\/p>\n

http:\/\/link.springer.com\/article\/10.1007\/s00397-015-0850-2<\/a><\/em><\/p>\n

14. Interpretation of different molecular packing in the micelles of lyotropic nematic and cholesteric phases via mass density measurements<\/p>\n

Erol Akpinar<\/em>*, Frank Giesselmann and Mahmut Acimis<\/p>\n

Journal of Molecular Liquids, 200, 354-360<\/em>, 2014<\/p>\n

http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167732214005236<\/a><\/em><\/p>\n

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<\/p>\n

Erol Akpinar<\/em>*, Dennys Reis, Muhammet Yildirim and Antonio Martins Figueiredo Neto<\/p>\n

Materials, 7(6),4132-4147<\/em>, 2014<\/p>\n

http:\/\/www.mdpi.com\/1996-1944\/7\/6\/4132<\/a><\/p>\n

12. Anomalous behavior in the crossover between the negative and positive biaxial nematic mesophases in a lyotropic liquid crystal<\/p>\n

Erol Akpinar*, <\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

ChemPhysChem, 15 (7), 1463-1469<\/em>, 2014<\/p>\n

http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/cphc.201301003\/abstract<\/a><\/span><\/p>\n

11. Contributions of intermicellar distance, micelle volume and screw angle to the temperature dependence of helical pitch in the intrinsic lyotropic cholesteric phases<\/p>\n

Erol Akpinar<\/em>*, Frank Giesselmann and Mahmut Acimis<\/p>\n

Journal of Molecular Liquids, 191, 20-28, 2014<\/p>\n

http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0167732213003966<\/a><\/p>\n

10. Dynamic light scattering and viscosity measurements in a ternary and quaternary discotic lyotropic nematic liquid crystal: tuning the backflow with salt<\/p>\n

Celso L.S. Risi, Antonio Martins Figueiredo Neto,Erol Akpinar<\/em>and Marcus B.L. Santos<\/p>\n

Physical Review E, 88 (2), 022506, 1-10, 2013<\/p>\n

http:\/\/pre.aps.org\/abstract\/PRE\/v88\/i2\/e022506<\/a><\/p>\n

9. Effect of micelle size and intermicellar distance on the chirality transfer in the intrinsic lyotropic cholesteric phases<\/p>\n

Erol Akpinar<\/em>*, Frank Giesselmann and Mahmut Acimis<\/p>\n

Liquid Crystals, 40 (9), 1183-1194, 2013<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2013.807941#.UgDoTpLZbCk<\/a><\/em><\/p>\n

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<\/p>\n

Dennys Reis, Erol Akpinar<\/em> and Antonio Martins Figueiredo Neto<\/p>\n

Journal of Physical Chemistry B, 117 (3), 942-948, 2013<\/p>\n

http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/jp310981d<\/a><\/em><\/p>\n

7. <\/b>Study of the Cholesteric-to-Cholesteric Phase Transitions on the Lyotropic Mixture of KL\/K2SO4\/1-undecanol\/water\/brucine Presenting the Cholesteric Biaxial Phase<\/p>\n

Erol Akpinar*, <\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Molecular Crystals Liquid Crystals, 576 (1), 98-105, 2013<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15421406.2013.789708<\/a><\/em><\/p>\n

6. <\/b>Investigation of the Interaction of Alkali Ions with Surfactant Head Groups for the Formation of Lyotropic Biaxial Nematic Phase via Optical Birefringence Measurements<\/p>\n

Erol Akpinar,<\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Proc. of Soc. Photo-Opt. Inst. Eng. (SPIE), 8642, art. no. 864203, 2013<\/p>\n

http:\/\/proceedings.spiedigitallibrary.org\/proceeding.aspx?articleid=1661620<\/a><\/em><\/p>\n

5. <\/b>Lyotropic Mixture Made of Potassium Laurate\/1-undecanol\/K2SO4\/water Presenting High Birefringences and Large Biaxial Nematic Phase Domain: A Laser Conoscopy Study<\/p>\n

Erol Akpinar,<\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

European Physical Journal E: Soft Matter and Biological Physics, 35, 50 (1-9), 2012<\/p>\n

http:\/\/link.springer.com\/article\/10.1140%2Fepje%2Fi2012-12050-9<\/a><\/em><\/p>\n

4. <\/b>Effect of Alkyl Chain Length of Alcohols on Nematic Uniaxial-to-Biaxial Phase Transitions in a Potassium laurate\/alcohol\/K2SO4\/water Lyotropic Mixture<\/p>\n

Erol Akpinar, <\/em>Dennys Reis and Antonio Martins Figueiredo Neto<\/p>\n

Liquid Crystals, 39 (7), 881-888, 2012<\/p>\n

http:\/\/www.tandfonline.com\/doi\/full\/10.1080\/02678292.2012.686637<\/a><\/em><\/p>\n

3. <\/b>Mass Density Measurements as a Tool to Distinguish Between Micelle Size and Shape in Nematic and Chiral Nematic Phases<\/p>\n

Mahmut Acimis and Erol Akpinar<\/em><\/p>\n

Physical Chemistry Chemical Physics, 5, 4197-4203, 2003<\/p>\n

http:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2003\/cp\/b304693<\/em>a<\/a><\/p>\n

2. Strange Mass Density Behaviour of a Micellar Chiral Nematic Phase Composed of an Amphiphilic Racemic Mixture and its L-enantiomer<\/p>\n

Erol Akpinar, <\/em>Mahmut Acimis and Cigdem Ocak<\/p>\n

Physical Chemistry Chemical Physics, 3, 645-646<\/i>, 2001<\/p>\n

http:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2001\/cp\/b100373i<\/a><\/em><\/p>\n

1. Effects of Salts and Structure of Chiral Dopants on the Induced Pitch from Micellar Nematic Phases<\/p>\n

Cigdem Ocak, Mahmut Acimis, Erol Akpinar <\/em>and Ayse Gok<\/p>\n

Physical Chemistry Chemical Physics, 2, 5703-5707, 2000<\/p>\n

http:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2000\/cp\/b006589g<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

(* Corresponding author) 36. Simulated interference colors from birefringence measurements in lyotropic calamitic nematic – biaxial nematic – discotic nematic phases Danilo D. Luders, Erol Akpinar European Physical Journal E, 48, 46 (1-9), 2025. https:\/\/link.springer.com\/article\/10.1140\/epje\/s10189-025-00510-6 35. Structure and local ordering of a lyotropic nematic phase and its intrinsic cholesteric counterpart Angela R.N. Santisteban, Dennys Reis, […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-97","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/pages\/97","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=97"}],"version-history":[{"count":144,"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/pages\/97\/revisions"}],"predecessor-version":[{"id":1059,"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=\/wp\/v2\/pages\/97\/revisions\/1059"}],"wp:attachment":[{"href":"http:\/\/liquidcrystals.ibu.edu.tr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=97"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}