1
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The effect of position of (-)-menthyl on the mesomorphic and photoisomerization behavior in azobenzene chiral liquid crystals. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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2
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Sun JT, Ge ZX, Li CY, Zhang ZY, Wang YM, Jia YG, Tian M, Yao DS. Novel branched liquid crystal oligomers containing azo and Schiff base groups. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Strójwąs K, Dąbrowski R, Drzewiński W, Szarek M, Bubnov A, Czerwiński M. The comparison of self-assembling behaviour of phenyl biphenylcarboxylate and biphenyl benzoate compounds with the different length and shape of chiral terminal chain. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Nanocomposite system of a discotic liquid crystal doped with thiol capped gold nanoparticles. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Novel Azocoumarin Derivatives—Synthesis and Characterization. Int J Mol Sci 2022; 23:ijms23105767. [PMID: 35628586 PMCID: PMC9147163 DOI: 10.3390/ijms23105767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/13/2022] [Accepted: 05/19/2022] [Indexed: 01/27/2023] Open
Abstract
The paper presents synthesis and characterization of nine new thiazolyl-(phenyldiazenyl)-2H-chromen-2-one dyes. The impact of substituent structure in thiazole ring in the synthesized azocoumarin derivatives on electrochemical properties, photoisomerization process and photovoltaic response was examined. The dyes were electrochemically active and undergo reduction and oxidation processes. They showed low electrochemically estimated energy band gap in the range of 1.71–2.13 eV. Photoisomerization process of the synthesized molecules was studied in various solvents such as ethanol, chloroform and N,N-dimethylformamide (DMF) upon the UV illumination. It was found that novel azodyes showed reversible trans-cis-trans isomerization and exhibited long thermal back to the trans form, that was even 7 days in DMF. Selected azocoumarin were molecularly dispersed in polystyrene for preparation of guest-host azopolymer systems to study the cis-trans thermal isomerization of obtained dyes in solid state. The photovoltaic activity of the azochromophores was tested in bulk-heterojunction solar cells. They acting as weak donors in device with structure ITO/PEDOT:PSS/dye:PC70BM/Al. No photovoltaic response of cells with azocoumarin derivatives bearing 4-fluorobenzene, 3,4-dichlorobenzene, or 4-(1-adamantyl) unit was found. Additionally, dye which showed the best activity was examined in three-component solar cells ITO/PEDOT:PSS/PTB7:PC70BM:dye/PFN/Al.
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Chen HH, Cigl M, Cheng CT, Bogdanowicz KA, Iwan A, Podoliak N, Vaňkátová P, Hamplová V, Dysz K, Przybył W, Nitschke P, Schab-Balcerzak E, Pociecha D, Bubnov A. Self-assembling discotic materials with low symmetry for organic photovoltaics. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118868] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Lin Y, Li G, Yu P, Ercan E, Chen W. Organic liquid crystals in optoelectronic device applications:
Field‐effect
transistors, nonvolatile memory, and photovoltaics. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yan‐Cheng Lin
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
| | - Guan‐Syuan Li
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ping‐Jui Yu
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ender Ercan
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
| | - Wen‐Chang Chen
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
- Advanced Research Center of Green Materials Science and Technology National Taiwan University Taipei Taiwan
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Pytlarczyk M, Herman J, Arakawa Y, Tsuji H, Kula P. Deuterated Liquid Crystals – practical synthesis of deuterium labeled 4-alkyl-4″-isothiocyanato-[1,1ʹ:4ʹ,1″]terphenyls. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Boychuk A, Shibaev V, Cigl M, Pomeisl K, Hamplová V, Pociecha D, Bubnov A, Bobrovsky A. Photo-orientation Processes in Liquid Crystalline Polymethacrylates with Side Azobenzene Groups Having Lateral Methyl Substituents. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Artem Boychuk
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Valery Shibaev
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
| | - Martin Cigl
- Institute of Physics of the Czech Academy of Sciences, 1999/2 Na Slovance, Prague 8 182 21, Czech Republic
| | - Karel Pomeisl
- Institute of Physics of the Czech Academy of Sciences, 1999/2 Na Slovance, Prague 8 182 21, Czech Republic
| | - Vĕra Hamplová
- Institute of Physics of the Czech Academy of Sciences, 1999/2 Na Slovance, Prague 8 182 21, Czech Republic
| | - Damian Pociecha
- Faculty of Chemistry, University of Warsaw, 101 ul. Zwirki i Wigury, Warsaw 02-089, Poland
| | - Alexej Bubnov
- Institute of Physics of the Czech Academy of Sciences, 1999/2 Na Slovance, Prague 8 182 21, Czech Republic
| | - Alexey Bobrovsky
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
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Spectroscopic and structural properties of CeO 2 nanocrystals doped with La 3+, Nd 3+ and modified on their surface with Ag nanoparticles. Heliyon 2021; 7:e06958. [PMID: 34027166 PMCID: PMC8129948 DOI: 10.1016/j.heliyon.2021.e06958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 03/13/2021] [Accepted: 04/26/2021] [Indexed: 11/24/2022] Open
Abstract
The purpose of this work is to present our efforts focused on applications of chemical synthesis of nanocrystalline cerium dioxide (CeO2) powders doped with La3+ ions and CeO2:Nd3+ modified, on their surface, with Ag nanoparticles (NPs). The synthesized powders were examined by X-ray powder diffraction (XRD), absorption, emission spectroscopy, scanning electron (SEM) and atomic force microscopy (AFM). The relations between crystallographic properties and stability of CeO2 compounds doped by La ions and surface-modified by Ag were studied. XRD patterns revealed that all studied samples are single-phase and crystallized in the cubic fluorite-type structure, in space group Fm-3m. The average crystallite sizes estimated by Rietveld method of series: La-doped CeO2 were in the range of 7–14 nm, and CeO2:1%Nd3+/n-Ag (n: 1- 5wt.%) were found to be in the range of 29–34 nm, respectively. The lattice parameter a for La-doped CeO2 powders varying from 5.416 to 5.482 Å with increasing content of La3+ ions from 0 to 20wt.%, respectively. For series of CeO2:Nd3+/n-Ag materials lattice parameter a was at the same level and in accordance with the standard value a0 = 5.411 Å (ICDD - 43-1002). The SEM and AFM observations depicted the grainy structure of all obtained CeO2-powder samples. The estimated grain size ranged from 50 to 500 nm. The diverse grain shapes and packing was remarked in the samples. According to our knowledge, the relationship between the structural, spectroscopic and morphological characteristics of CeO2 samples was presented in this work for the first time.
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11
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Czerwiński M, de Blas MG, Bennis N, Herman J, Dmochowska E, Otón JM. Polymer stabilized highly tilted antiferroelectric liquid crystals - the influence of monomer structure and phase sequence of base mixtures. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114869] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Chiral Photoresponsive Liquid Crystalline Materials Derived from Cyanoazobenzene Central Core: Effect of UV Light Illumination on Mesomorphic Behavior. CRYSTALS 2020. [DOI: 10.3390/cryst10121161] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
One of the most frequently utilized liquid crystalline (LC) materials is a rod-like (calamitic) compound 4-cyano-4′-pentylbiphenyl (5-CB). The main objective of this work is to enhance its functionality by introducing a photoresponsive diazenyl spacer in the aromatic core and replace the non-chiral pentyl chain with various chiral alkyl carboxylate units. The mesomorphic properties of the prepared materials have been studied using polarizing optical microscopy and differential scanning calorimetry. It has been found that materials with an extended aromatic system possess the liquid crystalline behavior. The studied LC materials have shown mesophases at lower temperatures than previously reported analogous substances. Furthermore, one of them exhibits a chiral orthogonal frustrated twist grain boundary smectic phase, which has not been previously observed for this structural type of materials. We also investigated photoresponse of the mesophases under illumination with UV-light (365 nm) using a polarizing optical microscope. A non-conventional photoresponse of the prepared materials in a crystalline phase is presented and discussed.
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13
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Enhanced charge carrier conduction and other characteristic parameters of hexagonal plastic columnar phase of a discotic liquid crystalline material due to functionalized gold nanoparticles. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113985] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Chaudhary A, Malik P, Shukla R, Mehra R, Raina K. Role of SiO2 optically active mediators to tailor optical and electro-optical properties of ferroelectric liquid crystalline nanocomposites. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113580] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Bubnov A, Bobrovsky A, Rychetský I, Fekete L, Hamplová V. Self-Assembling Behavior of Smart Nanocomposite System: Ferroelectric Liquid Crystal Confined by Stretched Porous Polyethylene Film. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1498. [PMID: 32751727 PMCID: PMC7466609 DOI: 10.3390/nano10081498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/22/2020] [Accepted: 07/27/2020] [Indexed: 11/30/2022]
Abstract
The control and prediction of soft systems exhibiting self-organization behavior can be realized by different means but still remains a highlighted task. Novel advanced nanocomposite system has been designed by filling of a stretched porous polyethylene (PE) film with pore dimensions of hundreds of nanometers by chiral ferroelectric liquid crystalline (LC) compound possessing polar self-assembling behavior. Lactic acid derivative exhibiting the paraelectric orthogonal smectic A* and the ferroelectric tilted smectic C* phases over a broad temperature range is used as a self-assembling compound. The morphology of nanocomposite film has been checked by Atomic Force Microscopy (AFM). The designed nanocomposite has been studied by polarizing optical microscopy (POM), differential scanning calorimetry (DSC), small and wide-angle X-ray scattering and broadband dielectric spectroscopy. The effect of a porous PE confinement on self-assembling, structural, and dielectric behavior of the chiral LC compound has been established and discussed. While the mesomorphic and structural properties of the nanocomposite are found not to be much influenced in comparison to that of a pure LC compound, the polar properties have been toughly suppressed by the specific confinement. Nevertheless, the electro-optic switching was clearly observed under applied electric field of low frequency (210 V, 19 Hz). The dielectric spectroscopy and X-ray results reveal that the helical structure of the ferroelectric liquid crystal inside the PE matrix is completely unwound, and the molecules are aligned along stretching direction. Obtained results demonstrate possibilities of using stretched porous polyolefins as promising matrices for the design of new nanocomposites.
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Affiliation(s)
- Alexej Bubnov
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech Republic; (I.R.); (L.F.); (V.H.)
| | - Alexey Bobrovsky
- Faculty of Chemistry, Moscow State University, Leninskie gory, 119992 Moscow, Russia;
| | - Ivan Rychetský
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech Republic; (I.R.); (L.F.); (V.H.)
| | - Ladislav Fekete
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech Republic; (I.R.); (L.F.); (V.H.)
| | - Věra Hamplová
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech Republic; (I.R.); (L.F.); (V.H.)
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16
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Effect of doping by enantiomers with the different absolute configuration and phase sequence on mesomorphic, helical and electro-optical properties of highly tilted chiral anticlinic mixture. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Pyrimidine-based ferroelectric mixtures – The influence of oligophenyl based chiral doping system. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112693] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Karanlık G, Ocak H, Bilgin Eran B. New pyridine based liquid crystalline esters with different terminal chains. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.126930] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Kurp K, Czerwiński M, Tykarska M, Salamon P, Bubnov A. Design of functional multicomponent liquid crystalline mixtures with nano-scale pitch fulfilling deformed helix ferroelectric mode demands. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111329] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Bury P, Veveričík M, Kopčanský P, Timko M, Studenyak IP. Effect of superionic nanoparticles on structural changes and electro-optical behavior in nematic liquid crystal. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Barman B, Das B, Das MK, Hamplová V, Bubnov A. Effect of molecular structure on dielectric and electro-optic properties of chiral liquid crystals based on lactic acid derivatives. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.071] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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The effect of the length of terminal n-alkyl carboxylate chain on self-assembling and photosensitive properties of chiral lactic acid derivatives. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Shvetsov SA, Emelyanenko AV, Boiko NI, Zolot'ko AS, Zhang YS, Liu JH, Khokhlov AR. Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:870-879. [PMID: 29600148 PMCID: PMC5870153 DOI: 10.3762/bjnano.9.81] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
Two sequential transformations of the orientational structure in nematic liquid crystal droplets containing a dendrimer additive (nanosized macromolecules with light-absorbing azobenzene terminal moieties) under light irradiation in the UV-blue spectral range were investigated. The origin of these transitions is in the change of the boundary conditions due to photoisomerization of the dendrimer adsorbed onto the liquid crystal-glycerol interface. It was shown that the photoisomerization processes of dendrimer molecules in a liquid crystal are accompanied by a spatial rearrangement of their azobenzene moieties, which is the key point in the explanation of the observed effects.
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Affiliation(s)
- Sergey A Shvetsov
- M.V. Lomonosov Moscow State University, Moscow, 119991, Russia
- P.N. Lebedev Physical Institute, Moscow, 119991, Russia
| | | | - Natalia I Boiko
- M.V. Lomonosov Moscow State University, Moscow, 119991, Russia
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Prakash J, Chandran A, Biradar AM. Scientific developments of liquid crystal-based optical memory: a review. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:016601. [PMID: 27848927 DOI: 10.1088/0034-4885/80/1/016601] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The memory behavior in liquid crystals (LCs), although rarely observed, has made very significant headway over the past three decades since their discovery in nematic type LCs. It has gone from a mere scientific curiosity to application in variety of commodities. The memory element formed by numerous LCs have been protected by patents, and some commercialized, and used as compensation to non-volatile memory devices, and as memory in personal computers and digital cameras. They also have the low cost, large area, high speed, and high density memory needed for advanced computers and digital electronics. Short and long duration memory behavior for industrial applications have been obtained from several LC materials, and an LC memory with interesting features and applications has been demonstrated using numerous LCs. However, considerable challenges still exist in searching for highly efficient, stable, and long-lifespan materials and methods so that the development of useful memory devices is possible. This review focuses on the scientific and technological approach of fascinating applications of LC-based memory. We address the introduction, development status, novel design and engineering principles, and parameters of LC memory. We also address how the amalgamation of LCs could bring significant change/improvement in memory effects in the emerging field of nanotechnology, and the application of LC memory as the active component for futuristic and interesting memory devices.
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Affiliation(s)
- Jai Prakash
- Department of Physics, Aligarh Muslim University, Aligarh 202002, UP, India
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25
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High efficient and stabilized photovoltaics via morphology manipulating in active layer by rod-coil block copolymers comprising different hydrophilic to hydrophobic dielectric blocks. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.09.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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26
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Bobrovsky A, Shibaev V, Cigl M, Hamplová V, Pociecha D, Bubnov A. Azobenzene-containing LC polymethacrylates highly photosensitive in broad spectral range. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28181] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexey Bobrovsky
- Faculty of Chemistry; Moscow State University; Leninskie Gory Moscow 119991 Russia
| | - Valery Shibaev
- Faculty of Chemistry; Moscow State University; Leninskie Gory Moscow 119991 Russia
| | - Martin Cigl
- Chemistry department, Institute of Physics, The Czech Academy of Sciences; Na Slovance 1999/2, 182 21 Prague 8 Czech Republic
| | - Vĕra Hamplová
- Chemistry department, Institute of Physics, The Czech Academy of Sciences; Na Slovance 1999/2, 182 21 Prague 8 Czech Republic
| | - Damian Pociecha
- Laboratory of Dielectrics and Magnetics, Chemistry Department; Warsaw University; Al. Zwirki I Wigury 101 Warsaw 02-089 Poland
| | - Alexej Bubnov
- Chemistry department, Institute of Physics, The Czech Academy of Sciences; Na Slovance 1999/2, 182 21 Prague 8 Czech Republic
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