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Nassrah ARK, Batkova M, Tomašovičová N, Tóth-Katona T. Photoaligning Polymeric Command Surfaces: Bind, or Mix? Polymers (Basel) 2023; 15:4271. [PMID: 37959951 PMCID: PMC10649986 DOI: 10.3390/polym15214271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/29/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
We compare photoaligning properties of polymer layers fabricated from the same constituents: polymethyl-methacrylate (PMMA) and azo-dye Disperse Red 1 (DR1), either chemically attached to the PMMA main-chain, or physically mixed with it. Photoaligning properties depend on the preparation method drastically. Photoalignment was found to be far more efficient when PMMA is functionalized with DR1 compared to the case of physically mixing the constituents. This finding is supported by atomic force microscope (AFM) scans monitoring the light-induced changes at the polymer-air interface, and revealing a photoinduced mass transfer, especially in the case of functionalized PMMA.
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Affiliation(s)
- Ameer R. K. Nassrah
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary;
- Faculty of Science, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest, Hungary
| | - Marianna Batkova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Kosice, Slovakia; (M.B.); (N.T.)
| | - Natália Tomašovičová
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonová 47, 04001 Kosice, Slovakia; (M.B.); (N.T.)
| | - Tibor Tóth-Katona
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary;
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Gombos J, Balejcikova L, Kopcansky P, Batkova M, Siposova K, Kovac J, Zolochevska K, Safarik I, Lokajova A, Garamus VM, Dobrota D, Strbak O. Destruction of Lysozyme Amyloid Fibrils Induced by Magnetoferritin and Reconstructed Ferritin. Int J Mol Sci 2022; 23:ijms232213926. [PMID: 36430405 PMCID: PMC9696235 DOI: 10.3390/ijms232213926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/02/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
Neurodegenerative disorders, including Alzheimer's disease (AD), Parkinson's disease (PD), or systemic amyloidosis, are characterized by the specific protein transformation from the native state to stable insoluble deposits, e.g., amyloid plaques. The design of potential therapeutic agents and drugs focuses on the destabilization of the bonds in their beta-rich structures. Surprisingly, ferritin derivatives have recently been proposed to destabilize fibril structures. Using atomic force microscopy (AFM) and fluorescence spectrophotometry, we confirmed the destructive effect of reconstructed ferritin (RF) and magnetoferritin (MF) on lysosome amyloid fibrils (LAF). The presence of iron was shown to be the main factor responsible for the destruction of LAF. Moreover, we found that the interaction of RF and MF with LAF caused a significant increase in the release of potentially harmful ferrous ions. Zeta potential and UV spectroscopic measurements of LAF and ferritin derivative mixtures revealed a considerable difference in RF compared to MF. Our results contribute to a better understanding of the mechanism of fibril destabilization by ferritin-like proteins. From this point of view, ferritin derivatives seem to have a dual effect: therapeutic (fibril destruction) and adverse (oxidative stress initiated by increased Fe2+ release). Thus, ferritins may play a significant role in various future biomedical applications.
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Affiliation(s)
- Jan Gombos
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University, 036 01 Martin, Slovakia
- Correspondence: (J.G.); (O.S.)
| | - Lucia Balejcikova
- Institute of Hydrology, Slovak Academy of Sciences, 841 01 Bratislava, Slovakia
| | - Peter Kopcansky
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
| | - Marianna Batkova
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
| | - Katarina Siposova
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
| | - Jozef Kovac
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
| | - Kristina Zolochevska
- Institute of Experimental Physics, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
| | - Ivo Safarik
- Department of Nanobiotechnology, Biology Centre, ISBB, Czech Academy of Sciences, 370 05 Ceske Budejovice, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacky University, 779 00 Olomouc, Czech Republic
| | - Alica Lokajova
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University, 036 01 Martin, Slovakia
| | - Vasil M. Garamus
- Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Dusan Dobrota
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University, 036 01 Martin, Slovakia
| | - Oliver Strbak
- Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University, 036 01 Martin, Slovakia
- Correspondence: (J.G.); (O.S.)
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Stelmakova M, Streckova M, Orinakova R, Guboova A, Balaz M, Girman V, Mudra E, Bera C, Batkova M. Effect of heat treatment on the morphology of carbon fibers doped with Co 2p nanoparticles. ACTA ACUST UNITED AC 2021; 76:855-867. [PMID: 34642537 PMCID: PMC8494604 DOI: 10.1007/s11696-021-01897-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 09/22/2021] [Indexed: 10/25/2022]
Abstract
Abstract Carbon fibers (CFs) decorated by Co2P nanoparticles and carbon nanotubes were prepared via needle-less electrospinning technique. Formation of catalytically active Co2P nanoparticles and growth of carbon nanotubes were monitored in open and closed sintering environment at different sintering exposure times. Higher porosity, important in the catalytic reaction for easier penetration of electrolyte into the CFs, was achieved by mixing two immiscible polymers with natrium dodecyl sulfate and subsequent heat treatment process. Structure and morphology of the prepared modified carbon fibers were characterized by XRD, SEM and TEM. The time of heat exposure at the sintering temperature of 1200 °C and closure of the sintering space showed distinct effect on the growth and shape of carbon nanotubes. SEM and Raman spectroscopy revealed that closure of the system led to the formation of carbon nanotubes with smaller diameters and less structural disorder. Comparing of as-prepared CFs revealed that CFs with Co2P sintered in the closed system exhibited the best electrocatalytic activity for hydrogen evolution reaction due to lower overpotential and smaller Tafel slope in acidic solution. Graphic abstract
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Affiliation(s)
- M Stelmakova
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic.,Institute of Physics, Faculty of Science, P.J. Safarik University, Park Angelinum 9, 041 54 Kosice, Slovak Republic
| | - M Streckova
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
| | - R Orinakova
- Institute of Chemistry, Faculty of Science, P.J. Safarik University, Moyzesova 11, 040 01 Kosice, Slovak Republic
| | - A Guboova
- Institute of Chemistry, Faculty of Science, P.J. Safarik University, Moyzesova 11, 040 01 Kosice, Slovak Republic
| | - M Balaz
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01 Kosice, Slovak Republic
| | - V Girman
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic.,Institute of Physics, Faculty of Science, P.J. Safarik University, Park Angelinum 9, 041 54 Kosice, Slovak Republic
| | - E Mudra
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
| | - C Bera
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
| | - M Batkova
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovak Republic
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Tomašovičová N, Batkova M, Batko I, Lacková V, Zavišová V, Kopčanský P, Jadżyn J, Salamon P, Tóth-Katona T. Orientational self-assembly of nanoparticles in nematic droplets. Nanoscale Adv 2021; 3:2777-2781. [PMID: 36134179 PMCID: PMC9418037 DOI: 10.1039/d1na00089f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/01/2021] [Indexed: 06/16/2023]
Abstract
We demonstrate experimentally that the anchoring of a nematic liquid crystal on a solid substrate together with the anchoring of the liquid crystal on a nanoparticle surface induces orientational self-assembly of anisometric nanoparticles in liquid crystal droplets. The observed phenomenon opens a novel route for fabrication of thin colloidal films with tailored properties.
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Affiliation(s)
- Natália Tomašovičová
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Marianna Batkova
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Ivan Batko
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Veronika Lacková
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Vlasta Zavišová
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Peter Kopčanský
- Institute of Experimental Physics, Slovak Academy of Sciences Watsonová 47 04001 Košice Slovakia
| | - Jan Jadżyn
- Institute of Molecular Physics, Polish Academy of Sciences 16 Smoluchowskiego str. 60179 Poznan Poland
| | - Péter Salamon
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics Konkoly-Thege Miklós út 29-33 H-1121 Budapest Hungary
| | - Tibor Tóth-Katona
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics Konkoly-Thege Miklós út 29-33 H-1121 Budapest Hungary
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Balejcikova L, Tomasovicova N, Zakutanska K, Batkova M, Kovac J, Kopcansky P. Dechlorination of 2,4,4'-trichlorobiphenyl by magnetoferritin with different loading factors. Chemosphere 2020; 260:127629. [PMID: 32698117 DOI: 10.1016/j.chemosphere.2020.127629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/26/2020] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
Polychlorinated biphenyls are synthetic industrial organic substances. These persistent pollutants occur in nature causing high ecological risks and damage to human health. Magnetoferritin nanoparticles composed of apoferritin protein shell surrounding synthetically prepared iron-based nanoparticles seem to be a promising candidate for polychlorinated biphenyls elimination. Properties of magnetoferritin, as a redox activity, a biocompatible character, high application possibilities and a close relationship with the human body promoted ours in vitro investigation of the magnetoferritin catalytic activity in the presence of representative 2,4,4'-trichlorobiphenyl. Basic physico-chemical properties of magnetoferritin were determined by ultraviolet and visible spectrophotometry, dynamic light scattering, zeta potential measurements, superconducting quantum interference device magnetometry and atomic force microscopy. The remediation effect of magnetoferritin on 2,4,4'-trichlorobiphenyl was demonstrated by the use of gas chromatography in combination with infrared spectroscopy.
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Affiliation(s)
- Lucia Balejcikova
- Institute of Hydrology SAS, Dúbravská Cesta 9, 841 04, Bratislava, Slovakia.
| | | | - Katarína Zakutanska
- Institute of Experimental Physic SAS, Watsonova 47, 04 01, Košice, Slovakia.
| | - Marianna Batkova
- Institute of Experimental Physic SAS, Watsonova 47, 04 01, Košice, Slovakia.
| | - Jozef Kovac
- Institute of Experimental Physic SAS, Watsonova 47, 04 01, Košice, Slovakia.
| | - Peter Kopcansky
- Institute of Experimental Physic SAS, Watsonova 47, 04 01, Košice, Slovakia.
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