Magnetically active anisotropic composite systems (MACOSYS, M-ERA.NET 2012)  Page description

Help  Print 
Back »
 

Details of project

  
Identifier
110672
Type NN
Principal investigator Tóth Katona, Tibor
Title in Hungarian Mágnesesen aktív anizotróp kompozit rendszerek (MACOSYS, M-ERA.NET 2012)
Title in English Magnetically active anisotropic composite systems (MACOSYS, M-ERA.NET 2012)
Keywords in Hungarian folyadékkrostályok; polimerek; mágneses nanorészecskék; anizotróp kolloidok.
Keywords in English liquid crystals; polymers; magnetic nanoparticles; anisotropic colloids.
Discipline
Physics (Council of Physical Sciences)50 %
Ortelius classification: Soft matter and polymer physics
Material Science and Technology (physics) (Council of Physical Sciences)30 %
Ortelius classification: Nanotechnology (Materials technology)
Organic, Biomolecular, and Pharmaceutical Chemistry (Council of Physical Sciences)20 %
Ortelius classification: Intelligent materials
Panel Physics 1
Department or equivalent Complex Fluids Department (Wigner Research Centre for Physics)
Participants Buka, Ágnes
Éber, Nándor
Fodor, Tamásné
Jánossy, István
Salamon, Péter
Starting date 2013-09-01
Closing date 2017-04-30
Funding (in million HUF) 14.946
FTE (full time equivalent) 4.62
state closed project
Summary in Hungarian
A kutatás összefoglalója, célkitűzései szakemberek számára
Itt írja le a kutatás fő célkitűzéseit a témában jártas szakember számára.
The proposal relates to basic research of anisotropic soft materials sensitive to magnetic fields. The targeted substances are composite materials, so called ferronematics (nematic liquid crystals (LCs) doped with spherical, rod-like, chain-like magnetite nanoparticles, or with carbon nanotubes functionalized with magnetite nanoparticles), and the cross-linked liquid crystalline polymers (elastomers) doped with nanoparticles. The key objectives are: (i) to measure the optical and dielectric responses of these materials to low magnetic fields; (ii) to explore which conditions influence these responses (e.g., bias magnetic field, pretilt, anchoring between the liquid crystal and nanoparticles); (iii) to contribute to the better understanding of the major problem in ferronematics (FNs): the aggregation process; (iv) to enhance the magnetic field induced phase transition temperature shift in a novel type of FNs; (v) to produce mesogenic cross-linked composites sensitive to magnetic fields.

Mi a kutatás alapkérdése?
Ebben a részben írja le röviden, hogy mi a kutatás segítségével megválaszolni kívánt probléma, mi a kutatás kiinduló hipotézise, milyen kérdéseket válaszolnak meg a kísérletek.
The key questions targeted by the project proposal (and the hypothesis how the experiments may answer the question) are:
- Under which conditions is the application of the small bias magnetic field crucial for the optical response of ferronematics at low magnetic fields? (A possible answer is expected from the experiments with and without the bias magnetic field);
- How the initial pretilt angle relates to the bias magnetic field and to the response (both optical and dielectric) to low magnetic fields? (A possible answer is expected from the experiments by changing the direction of the bias magnetic field and that of the pretilt angle);
- Besides the restoring elastic interactions, which other factors/interactions give contribution to the aggregation of nanoparticles in ferronematics? (Could be answered by studies of the aggregation process for different type of nanoparticles, for homogeneously as well as for periodically distorted initial state of the nematic liquid crystal host material);
- Can the magnetic field induced shift of the phase transition temperature be considerably enhanced? (To our expectations yes, in ferronematics based on bent-core nematics);
- Can one produce a magnetically sensitive, optically anisotropic self standing film? (We think yes, by doping liquid crystalline polymers with magnetic nanoparticles prior the aligning and cross-linking process).

Mi a kutatás jelentősége?
Röviden írja le, milyen új perspektívát nyitnak az alapkutatásban az elért eredmények, milyen társadalmi hasznosíthatóságnak teremtik meg a tudományos alapját. Mutassa be, hogy a megpályázott kutatási területen lévő hazai és a nemzetközi versenytársaihoz képest melyek az egyediségei és erősségei a pályázatának!
On the one hand, the increased sensitivity of ferronematics to magnetic fields regarding their optical and dielectric responses, as well as the enhancement of the magnetically induced shift in the phase transition temperature – which are the main objectives of the project proposal – could certainly trigger further experimental and theoretical research in the expanding field of magnetoactive composite materials. On the other hand, but not less importantly, these objectives of the project, together with a better understanding of the aggregation process of nanoparticles (another key objective of the proposal) are directly related to the questions/problems that have prevented ferronematics from the realization of practical applications in various magneto-optical or magneto-mechanical devices. Therefore, the present project proposal has a considerable importance from the viewpoint of potential technological applications too.

A kutatás összefoglalója, célkitűzései laikusok számára
Ebben a fejezetben írja le a kutatás fő célkitűzéseit alapműveltséggel rendelkező laikusok számára. Ez az összefoglaló a döntéshozók, a média, illetve az érdeklődők tájékoztatása szempontjából különösen fontos az NKFI Hivatal számára.
The proposal targets basic research on composite materials (ferronematics) consisting of liquid crystals and various magnetic nanoparticles, which combine the anisotropic properties of liquid crystals with the magnetic properties of the nanoparticles, resulting in composites with potentially unique dielectric/magnetic and optical properties (that the component materials themselves do not possess). The planned international cooperation also involves modelling of the processes observed in these novel materials by numerical calculations. The proposed studies concentrate on the increase of the sensitivity of our composite soft matter materials to magnetic fields, and the ultimate goal of the proposal is to make a step forward towards potential applications of ferronematics in various magneto-optical or magneto-mechanical devices which can be used in the future, e.g., in telecommunication.
The proposal relies on the complementing expertise of the cooperating partners as it is detailed below. The key objectives are:
- to measure the optical and dielectric responses of these materials to low magnetic fields; - to explore which conditions influence these responses (e.g., bias magnetic field, pretilt, anchoring between the liquid crystal and nanoparticles);
- to contribute to the better understanding of the major problem in ferronematics: the aggregation process; - to enhance the magnetic field induced phase transition temperature shift in a novel type of ferronematics;
- to produce mesogenic cross-linked composites sensitive to magnetic fields.
Summary
Summary of the research and its aims for experts
Describe the major aims of the research for experts.
The proposal relates to basic research of anisotropic soft materials sensitive to magnetic fields. The targeted substances are composite materials, so called ferronematics (nematic liquid crystals (LCs) doped with spherical, rod-like, chain-like magnetite nanoparticles, or with carbon nanotubes functionalized with magnetite nanoparticles), and the cross-linked liquid crystalline polymers (elastomers) doped with nanoparticles. The key objectives are: (i) to measure the optical and dielectric responses of these materials to low magnetic fields; (ii) to explore which conditions influence these responses (e.g., bias magnetic field, pretilt, anchoring between the liquid crystal and nanoparticles); (iii) to contribute to the better understanding of the major problem in ferronematics (FNs): the aggregation process; (iv) to enhance the magnetic field induced phase transition temperature shift in a novel type of FNs; (v) to produce mesogenic cross-linked composites sensitive to magnetic fields.

What is the major research question?
Describe here briefly the problem to be solved by the research, the starting hypothesis, and the questions addressed by the experiments.
The key questions targeted by the project proposal (and the hypothesis how the experiments may answer the question) are:
- Under which conditions is the application of the small bias magnetic field crucial for the optical response of ferronematics at low magnetic fields? (A possible answer is expected from the experiments with and without the bias magnetic field);
- How the initial pretilt angle relates to the bias magnetic field and to the response (both optical and dielectric) to low magnetic fields? (A possible answer is expected from the experiments by changing the direction of the bias magnetic field and that of the pretilt angle);
- Besides the restoring elastic interactions, which other factors/interactions give contribution to the aggregation of nanoparticles in ferronematics? (Could be answered by studies of the aggregation process for different type of nanoparticles, for homogeneously as well as for periodically distorted initial state of the nematic liquid crystal host material);
- Can the magnetic field induced shift of the phase transition temperature be considerably enhanced? (To our expectations yes, in ferronematics based on bent-core nematics);
- Can one produce a magnetically sensitive, optically anisotropic self standing film? (We think yes, by doping liquid crystalline polymers with magnetic nanoparticles prior the aligning and cross-linking process).

What is the significance of the research?
Describe the new perspectives opened by the results achieved, including the scientific basics of potential societal applications. Please describe the unique strengths of your proposal in comparison to your domestic and international competitors in the given field.
On the one hand, the increased sensitivity of ferronematics to magnetic fields regarding their optical and dielectric responses, as well as the enhancement of the magnetically induced shift in the phase transition temperature – which are the main objectives of the project proposal – could certainly trigger further experimental and theoretical research in the expanding field of magnetoactive composite materials. On the other hand, but not less importantly, these objectives of the project, together with a better understanding of the aggregation process of nanoparticles (another key objective of the proposal) are directly related to the questions/problems that have prevented ferronematics from the realization of practical applications in various magneto-optical or magneto-mechanical devices. Therefore, the present project proposal has a considerable importance from the viewpoint of potential technological applications too.

Summary and aims of the research for the public
Describe here the major aims of the research for an audience with average background information. This summary is especially important for NRDI Office in order to inform decision-makers, media, and others.
The proposal targets basic research on composite materials (ferronematics) consisting of liquid crystals and various magnetic nanoparticles, which combine the anisotropic properties of liquid crystals with the magnetic properties of the nanoparticles, resulting in composites with potentially unique dielectric/magnetic and optical properties (that the component materials themselves do not possess). The planned international cooperation also involves modelling of the processes observed in these novel materials by numerical calculations. The proposed studies concentrate on the increase of the sensitivity of our composite soft matter materials to magnetic fields, and the ultimate goal of the proposal is to make a step forward towards potential applications of ferronematics in various magneto-optical or magneto-mechanical devices which can be used in the future, e.g., in telecommunication.
The proposal relies on the complementing expertise of the cooperating partners as it is detailed below. The key objectives are:
- to measure the optical and dielectric responses of these materials to low magnetic fields; - to explore which conditions influence these responses (e.g., bias magnetic field, pretilt, anchoring between the liquid crystal and nanoparticles);
- to contribute to the better understanding of the major problem in ferronematics: the aggregation process; - to enhance the magnetic field induced phase transition temperature shift in a novel type of ferronematics;
- to produce mesogenic cross-linked composites sensitive to magnetic fields.




 

Final report

  
Results in Hungarian
A kutatási projekt célkitűzéseivel és alapkérdéseivel összhangban, több új ferronematikus (FN) kompozitot készítettünk, és: (i.) megmértük azok kis mágneses terekre adott optikai és dielektromos válaszát; (ii.) tisztáztuk a kis, dc előfeszítési (bias) mágneses tér, valamint a határoló felületeken lévő rögzítési (anchoring) szög ferronematikusok válaszában játszott szerepét; (iii.) meghatároztuk az aggregációs folyamatok hatását a ferronematikusok kis mágneses terekre adott válaszára, és mágneses szuszceptibilitásukra; (iv.) az izotrop-nematikus fázisátmeneti hőmérséklet jelentős változását detektáltuk a mágneses tér, valamint a nanorészecskék anizometriájának függvényében; (v.) részleges haladást értünk el a mágnesesen és optikailag érzékeny önmegtartó filmek elkészítésében, ami rövid válaszidővel rendelkező fényérzékeny polimereket eredményezett; (vi.) habár a nematikus fázis periodikusan modulált állapotában az aggregációs folyamatokra gyakorolt hatást nem mértünk, jelentős hozzájárulást értünk el a nematikusok elektrokonvekciós és a flexoelektromos mintázatképző folyamatainak kutatásában. A project keretében fenn vázolt kutatások (az NKFI támogatási szerződésszám feltüntetésével) 18 publikációt eredményeztek nemzetközi referált folyóiratokban (több mint 40-es kumulatív impakt-faktorral), valamint három cikket konferencia-kiadványban és hat konferencia absztraktot.
Results in English
In line with the key goals and with the basic research questions of the project, various novel ferronematics (FNs) have been prepared, and: (i.) their optical and dielectric response to low magnetic fields has been measured; (ii.) the role of a small bias dc magnetic field, and that of the anchoring angle at the bounding interfaces to the response of FNs has been clarified; (iii.) the influence of the aggregation process on the response to low magnetic field, and on the magnetic susceptibility has been determined; (iv.) a considerable shift of the isotropic-to-nematic phase transition temperature induced by the magnetic field, as well as by the anisometry of the nanoparticles has been detected; (v.) attempts have been made to prepare magnetically- and optically sensitive self-standing films, with partial success resulting in photo-sensitive polymers with a fast response time; (vi.) though no influence of the periodically distorted state of the nematic liquid crystal to the aggregation process has been measured, significant contributions have been made to the research of the electro-convective and flexo-electric pattern forming processes in nematics. The above outlined research in the frame of the project (and with the NKFI supporting grant number indicated) resulted in 18 papers in scientific peer-reviewed international journals (with a cumulative impact factor above 40), in three conference proceedings papers, and in six conference abstracts.
Full text https://www.otka-palyazat.hu/download.php?type=zarobeszamolo&projektid=110672
Decision
Yes





 

List of publications

  
T. Tóth-Katona, M. Cigl, K. Fodor-Csorba, V. Hamplová, I. Jánossy, M. Kašpar, T. Vojtylová, F. Hampl, A. Bubnov: Functional photochromic methylhydrosiloxane-based side chain liquid crystalline polymers, Macromol. Chem. Phys. 215(8), 742-752, 2014
T. Tóth-Katona, P. Salamon, N. Éber, N. Tomašovičová, Z. Mitróová, P. Kopčansky: High Concentration Ferronematics in Low Magnetic Fields, J. Magn. Magn. Mater. 372, 117-121, 2014
P. Salamon, N. Éber, B. Fekete, Á. Buka: Inhibited pattern formation by asymmetrical high-voltage excitation in nematic fluids, Phys. Rev. E 90, 022505/1-5, 2014
V. Gdovinová, N. Tomašovičová, N. Éber, T. Tóth-Katona, V. Závišová, M. Timko, P. Kopčansky: Influence of the Anisometry of Magnetic Particles on the Isotropic-Nematic Phase Transition, Liq. Cryst. (in press). DOI: 10.1080/02678292.2014.950615, 2014
P. Kopčansky, N. Tomašovičová, V. Gdovinová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn, J. Honkonen, X. Chaud: How to enhance sensitivity of liquid crystals to external magnetic field?, Acta Phys. Pol. A (accepted for publication), 2014
J.M. Marković, N.P. Trišović, T. Tóth-Katona, M.K. Milčić, A.D. Marinković, C. Zhang, A.J. Jákli, K. Fodor-Csorba: Structure–property relationship study of bent-core mesogens with pyridine as the central unit, New J. Chem. 38, 1751-1760, 2014
I. Jánossy, K. Fodor-Csorba, A. Vajda, T. Tóth-Katona: Laser-induced instabilities in liquid crystal cells with a photosensitive substrate, Phys. Rev. E89, 012504/1-6, 2014
I. Jánossy, K. Fodor-Csorba, A. Vajda, L.O. Palomares, T. Tóth-Katona: Light-induced instabilities in photo-oriented liquid crystal cells, Mol. Cryst. Liq. Cryst. 594, (in press). DOI: 10.1080/15421406.2014.917496, 2014
T. Tóth-Katona, K. Fodor-Csorba, A. Vajda, I. Jánossy: Instabilities induced by Light in Liquid Crystal Cells with a Photo-Responsive Substrate, Proceedings of the 15th Small Triangle Meeting on Theoretical Physics, Eds: J. Buša, M. Hnatič, P. Kopčansky; IEP SAS, Košice, pp. 136-141, 2014
P. Kopcansky, N. Tomasovicova, M. Timko, V. Gdovinova, T. Tóth-Katona, N. Éber, C.-K. Hu, S. Hayryan, X. Chaud: Increase of the sensitivity of liquid crystals to magnetic field due to doping with magnetic nanoparticles, Proceedings of the 9th International PAMIR Conference – Fundamental and Applied MHD, Thermo Acoustic and Space Technology (Riga, Latvia, June 16-20), Vol. 2, p. 337-341, 2014
P. Kopčanský, N. Tomašovičová, M. Timko, V. Závišová, N. Éber, T. Tóth-Katona, K. Fodor-Csorba, A. Vajda, J. Honkonen, X. Chaud: Magnetic field induced isotropic-nematic transition in ferronematics based on a bent-core mesogen, 25th International Liquid Crystal Conference (oral contribution, book of abstracts pp. N-O1.001), June 29 – July 04, 2014, Dublin, Ireland, 2014
N. Tomašovičová, V. Gdovinová, V. Závišová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn, P. Kopčanský: Influence of the anisotropy of magnetic particles on the isotropic-nematic phase transition in liquid crystal, 25th International Liquid Crystal Conference (oral contribution, book of abstracts pp. N-O2.003), June 29 – July 04, 2014, Dublin, Ireland, 2014
N. Tomašovičová, V. Závišová, M. Timko, M. Kubovčíková, N. Éber, T. Tóth-Katona, J. Jadzyn, P. Kopčanský: Influence of doping with rod-like magnetic particles on the properties of the nematic 6CHBT, 25th International Liquid Crystal Conference (poster contribution, book of abstracts pp. P1.101), June 29 – July 04, 2014, Dublin, Ireland, 2014
T. Tóth-Katona, M. Cigl, K. Fodor-Csorba, V. Hamplová, I. Jánossy, M. Kašpar, T. Vojtylová, F. Hampl, A. Bubnov: Functional photochromic methylhydrosiloxane-based side chain liquid crystalline polymers, Macromol. Chem. Phys. 215(8), 742-752, 2014
T. Tóth-Katona, P. Salamon, N. Éber, N. Tomašovičová, Z. Mitróová, P. Kopčansky: High Concentration Ferronematics in Low Magnetic Fields, J. Magn. Magn. Mater. 372, 117-121, 2014
P. Salamon, N. Éber, B. Fekete, Á. Buka: Inhibited pattern formation by asymmetrical high-voltage excitation in nematic fluids, Phys. Rev. E 90, 022505/1-5, 2014
V. Gdovinová, N. Tomašovičová, N. Éber, T. Tóth-Katona, V. Závišová, M. Timko, P. Kopčansky: Influence of the Anisometry of Magnetic Particles on the Isotropic-Nematic Phase Transition, Liq. Cryst. 41, 1773-1777, 2014
P. Kopčansky, N. Tomašovičová, V. Gdovinová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn, J. Honkonen, X. Chaud: How to enhance sensitivity of liquid crystals to external magnetic field?, Acta Phys. Pol. A 127, 157-162, 2015
J.M. Marković, N.P. Trišović, T. Tóth-Katona, M.K. Milčić, A.D. Marinković, C. Zhang, A.J. Jákli, K. Fodor-Csorba: Structure–property relationship study of bent-core mesogens with pyridine as the central unit, New J. Chem. 38, 1751-1760, 2014
I. Jánossy, K. Fodor-Csorba, A. Vajda, T. Tóth-Katona: Laser-induced instabilities in liquid crystal cells with a photosensitive substrate, Phys. Rev. E89, 012504/1-6, 2014
I. Jánossy, K. Fodor-Csorba, A. Vajda, L.O. Palomares, T. Tóth-Katona: Light-induced instabilities in photo-oriented liquid crystal cells, Mol. Cryst. Liq. Cryst. 594, 92-99, 2014, 2014
T. Tóth-Katona, K. Fodor-Csorba, A. Vajda, I. Jánossy: Instabilities induced by Light in Liquid Crystal Cells with a Photo-Responsive Substrate, Proceedings of the 15th Small Triangle Meeting on Theoretical Physics, Eds: J. Buša, M. Hnatič, P. Kopčansky; IEP SAS, Košice, pp. 136-141, 2014
N. Trišović, J. Antanasijević, T. Tóth-Katona, M. Kohout, M. Salamonczyk, S. Sprunt, A.J. Jákli, K. Fodor-Csorba: Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases, RSC Adv. 5, 64886-64891, 2015
A. Juriková, K. Csach, J. Miškuf, N. Tomašovičová, Z. Mitróová, V. Závišová, M. Koneracká, P. Kopčanský, M. Timko, N. Éber, K. Fodor-Csorba, A. Vajda: Thermal Stability of Bent-Core Liquid Crystals Doped with Magnetic Nanoparticles, Acta Phys. Pol. A 127, 638-640, 2015
A. Juriková, K. Csach, J. Miškuf, N. Tomašovičová, Z. Mitróová, P. Kopčanský, N. Éber, K. Fodor-Csorba, A. Vajda: DSC Study of Bent-Core and Rod-Shaped Liquid Crystal Mixtures, Mol. Cryst. Liq. Cryst. 610, 187-192, 2015
N. Tomašovičová, M. Timko, N. Éber, T. Tóth-Katona, K. Fodor-Csorba, A. Vajda, V. Gdovinová, P. Kopčanský: Magnetically induced shift of the phase transition temperature in a mixture of bent-core and calamitic doped with magnetic particles, Liq. Cryst. 42, 959-963, 2015
M.-Y. Xu, M.-j. Zhou, Y. Xiang, P. Salamon, N. Éber, Á. Buka: Domain structures as optical gratings controlled by electric field in a bent-core nematic, Opt. Express 23, 15224-15234, 2015
Y. Xiang, M.-j. Zhou, M.-Y. Xu, P. Salamon, N. Éber, Á. Buka: Unusual polarity-dependent patterns in a bent-core nematic liquid crystal under low-frequency ac field, Phys. Rev. E 91, 042501/1-9, 2015
Y. Xiang, M.-j. Zhou, M.-Y. Xu, P. Salamon, N. Éber, Á. Buka: Unusual polarity-dependent patterns in a bent-core nematic liquid crystal under low frequency ac field, The 15th International Conference on Ferroelectric Liquid Crystals (poster contribution, book of abstracts pp. 89), June 28 – July 03, 2015, Prague, Czech Republic., 2015
Y. Xiang, J.-L. Li, M.-Y. Xu, P. Salamon, N. Éber, Á. Buka: Characteristics of flexoelectric domains in a bent-core nematic under ultra-low frequency ac electric field, The 15th International Conference on Ferroelectric Liquid Crystals (poster contribution, book of abstracts pp. 104), June 28 – July 03, 2015, Prague, Czech Republic., 2015
P. Kopčanský, N. Tomašovičová, V. Gdovinová, M. Timko, V. Závišová, N. Éber, T. Tóth-Katona, F. Royer, D. Jamon, C-K Hu: Ferronematics in low magnetic field, 20th International Conference on Magnetism (poster contribution, book of abstracts pp. TU.F-P122), July 5–10, 2015, Barcelona, Spain., 2015
A. Juríková, K. Csach, J. Miškuf, N. Tomašovičová, Z. Mitróová, V. Závišová, M. Koneracká, P. Kopčanský, N. Éber, K. Fodor-Csorba, A. Vajda: Influence of magnetic nanoparticles on phase transition temperatures in bent-core and rod-shaped liquid crystal mixture, 20th International Conference on Magnetism (poster contribution, book of abstracts p. TU.F-P50), July 5–10, 2015, Barcelona, Spain., 2015
K. Csach, A. Juríková, J. Miškuf, N. Tomašovičová, Z. Mitróová, V. Závišová, M. Koneracká, P. Kopčanský, N. Éber, K. Fodor-Csorba, A. Vajda: Influence of magnetic nanoparticles on nematic to isotropic phase transition kinetics in liquid crystal mixture, 20th International Conference on Magnetism (poster contribution, book of abstracts p. TU.F-P49), July 5–10, 2015, Barcelona, Spain., 2015
I. Jánossy, T. Tóth-Katona, T. Kósa, L. Shuklominova: Super-twist generation and instabilities in photosensitive liquid crystal cells, 16th Topical Meeting on Optics of Liquid Crystals – OLC2015 (oral contribution, book of abstracts pp. O-10), September 13 – 18, 2015, Sopot, Poland, 2015
T. Tóth-Katona, V. Hamplová, A. Bubnov, M. Cigl, K. Fodor-Csorba, I. Jánossy, F. Hampl, T. Vojtylová, L. Cmok, I. Drevenšek-Olenik, M. Kašpar: A new photochromic liquid crystalline monomer and its poly[(methylhydro)siloxane]-based side-chain polymer derivatives, 8th International Liquid Crystal Elastomer Conference – ILCEC15 (poster contribution, accepted), October 02 – 07, 2015, Erice, Italy, 2015
P. Kopčansky, N. Tomašovičová, V. Gdovinová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn, J. Honkonen, X. Chaud: How to enhance sensitivity of liquid crystals to external magnetic field?, Acta Phys. Pol. A 127, 157-162, 2015
N. Trišović, J. Antanasijević, T. Tóth-Katona, M. Kohout, M. Salamonczyk, S. Sprunt, A.J. Jákli, K. Fodor-Csorba: Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases, RSC Adv. 5, 64886-64891, 2015
A. Juriková, K. Csach, J. Miškuf, N. Tomašovičová, Z. Mitróová, V. Závišová, M. Koneracká, P. Kopčanský, M. Timko, N. Éber, K. Fodor-Csorba, A. Vajda: Thermal Stability of Bent-Core Liquid Crystals Doped with Magnetic Nanoparticles, Acta Phys. Pol. A 127, 638-640, 2015
A. Juriková, K. Csach, J. Miškuf, N. Tomašovičová, Z. Mitróová, P. Kopčanský, N. Éber, K. Fodor-Csorba, A. Vajda: DSC Study of Bent-Core and Rod-Shaped Liquid Crystal Mixtures, Mol. Cryst. Liq. Cryst. 610, 187-192, 2015
N. Tomašovičová, M. Timko, N. Éber, T. Tóth-Katona, K. Fodor-Csorba, A. Vajda, V. Gdovinová, P. Kopčanský: Magnetically induced shift of the phase transition temperature in a mixture of bent-core and calamitic doped with magnetic particles, Liq. Cryst. 42, 959-963, 2015
M.-Y. Xu, M.-j. Zhou, Y. Xiang, P. Salamon, N. Éber, Á. Buka: Domain structures as optical gratings controlled by electric field in a bent-core nematic, Opt. Express 23, 15224-15234, 2015
Y. Xiang, M.-j. Zhou, M.-Y. Xu, P. Salamon, N. Éber, Á. Buka: Unusual polarity-dependent patterns in a bent-core nematic liquid crystal under low-frequency ac field, Phys. Rev. E 91, 042501/1-9, 2015
T. Tóth-Katona, V. Hamplová, A. Bubnov, M. Cigl, K. Fodor-Csorba, I. Jánossy, F. Hampl, T. Vojtylová, L. Cmok, I. Drevenšek-Olenik, M. Kašpar: A new photochromic liquid crystalline monomer and its poly[(methylhydro)siloxane]-based side-chain polymer derivatives, 8th International Liquid Crystal Elastomer Conference – ILCEC15 (poster contribution), October 02 – 07, 2015, Erice, Italy, 2015
N. Trišović, J. Antanasijević, J. Rogan, D. Poleti, T. Tóth-Katona, M. Salamonczyk, A. Jákli, and K. Fodor-Csorba: Investigation of supramolecular architetures of bent-shaped pyridine derivatives: from three-ring crystalline compound towards five-ring mesogens, New J. Chem. 40, 6977-6985, 2016
N. Tomašovičová, J. Kováč, Y. Raikher, N. Éber, T. Tóth-Katona, V. Gdovinová, J. Jadzyn, R. Pinčák, and P. Kopčanský: Biasing the ferronematic ̶ a new way to detect weak magnetic field, Soft Matter 12, 5780-5786, 2016
N. Éber, P. Salamon, B. A. Fekete, R. Karapinar, A. Krekhov, and Á. Buka: Suppression of spatially periodic patterns by dc voltage, Phys. Rev. E 93, 042701, 2016
V. Gdovinová, P. Kopčanský, N. Tomašovičová, M. Timko, N. Éber, T. Tóth-Katona, J. Jadzyn: The influence of doping liquid crystals with magnetic particles on the phase transition temperature, 26th Intenational Liquid Crystal Conference, ILCC2016 (poster contribution P-3-69, book of abstracts), July 31– August 05, Kent OH, USA, 2016
V. Gdovinová, N. Tomašovičová, V. Závišová, N. Éber, T. Tóth-Katona, F. Royer, D. Jamon, J. Jadzyn, P. Kopčanský: Low magnetic field response in ferronematics, 16th Czech and Slovak Conference on Magnetism (poster contribution P5-14, book of abstracts pp. 220), June 13–17, 2016, Košice, Slovakia, 2016
Tóth-Katona T., Fodor-Csorba K, Vajda A., Kósa T., Shuklominova L., Jánossy I.,: Fénnyel keltett átorientálások és instabilitások, Magyar Fizikus Vándorgyűlés 2016 (előadás), 2016. augusztus 24. – 27., Szeged, Magyarország, 2016
Éber N., Buka Á., P. Salamon, Tóth-Katona T., Fekete B., Krekhov A., Pesch W.: Aszimmetrikus feszültséggel keltett mintázatok folyadékkristályban, Magyar Fizikus Vándorgyűlés 2016 (poszter), 2016. augusztus 24. – 27., Szeged, Magyarország, 2016
N. Éber, B. Fekete, P. Salamon, A. Krekhov, Á. Buka: Influence of DC Voltage on the Dielectric Properties of Nematics, First International Symposium on Dielectric Materials and Applications (ISyDMA2016), (invited talk, Conf-7) Kenitra – Rabat, Morocco, 4-6 May, 2016, 2016
K. Csach, A. Juríková, J. Miškuf, N. Tomašovičová, V. Gdovinová, V. Závišová, P. Kopčanský, N. Éber, K. Fodor-Csorba, and A. Vajda: Kinetics of nematic to isotropic phase transition in liquid crystal doped with magnetic nanoparticles, 16th Czech and Slovak Conference on Magnetism (Poster P5-19, book of abstracts pp. 220), June 13 – 17, 2016, , Košice, Slovakia, 2016
N. Éber, P. Salamon and Á. Buka: Electrically induced patterns in nematics and how to avoid them, Liq. Cryst. Rev. 4 (2), 101-134, 2016
N. Éber, B. Fekete, P. Salamon, Á. Buka, A. Krekhov: Influence of DC voltage on the dielectric properties of nematics, Materials Research Proceedings, Dielectric Materials and Applications ISyDMA, Eds. M.E.Achour, R.Touahni, R.Messoussi, M.Elaatmani, M.Ait Ali, Vol.1, pp.42-44., 2016
V. Gdovinová, N. Tomašovičová, V. Závišová, N. Éber, T. Tóth-Katona, F. Royer, D. Jamon, I. Vávra, J. Jadzyn, and P. Kopčanský: Low Magnetic Field Response in Ferronematics, Acta Phys. Pol. A 131, 934-936, 2017
V. Gdovinová, N. Tomašovičová, N. Éber, P. Salamon, T. Tóth-Katona, V. Závišová, J. Kováč, J. Jadzyn and P. Kopčanský: Ferronematics based on the nematic 6CB in combined electric and magnetic fields, Phase Transit., AiP, 2017
Y. Xiang, H.-Z. Jing, Z.-D. Zhang, W.-J. Ye, M.-Y. Xu, E. Wang, P. Salamon, N. Éber, and Á. Buka: Tunable optical grating based on the flexoelectric effect in a bent-core nematic liquid crystal, Phys. Rev. Appl. (accepted for publication), 2017
K. Csach, A. Juríková, J. Miškuf, N. Tomašovičová, V. Gdovinová, V. Závišová, P. Kopčanský, N. Éber, K. Fodor-Csorba, A. Vajda: Kinetics of Nematic to Isotropic Phase Transition in Liquid Crystal Doped with Magnetic Nanoparticles, Acta Phys. Pol. A 131, 949-951, 2017




 

Events of the project

  
2015-06-17 19:30:34
Résztvevők változása



Back »