1
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Bodzioch A, Obijalska E, Jakubowski R, Celeda M, Gardias A, Trzybiński D, Tokarz P, Szczytko J, Woźniak K, Kaszyński P. Electronic and Magnetic Interactions in 6-Oxoverdazyl Diradicals: Connection through N(1) vs C(3) Revisited. J Org Chem 2024; 89:6306-6321. [PMID: 38626755 DOI: 10.1021/acs.joc.4c00303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Four isomeric di-6-oxoverdazyl diradicals connected at their N(1) or C(3) positions with either 1,3- or 1,4-phenylene linkers were obtained and characterized by spectroscopic, electrochemical, magnetic, and structural methods. These results were compared to those for the corresponding 6-oxoverdazyl monoradicals. UV-vis spectroscopy demonstrated that only the N(1)-connected para-through-benzene diradical has a distinct spectrum with significant bathochromic and hypsochromic shifts relative to the remaining species. Electrochemical analysis revealed two one-electron reduction processes in all diradiacals, while only the N(1)-connected para-through-benzene diradical exhibits two one-electron oxidation processes separated by 0.10 V. Variable temperature EPR measurements in polystyrene solid solutions gave negative mean exchange interaction energies J for all diradicals, suggesting the dominance of conformers with significant intramolecular antiferromagnetic interactions for the meta-through-benzene isomers. DFT calculations predict a small preference for the triplet state with the ΔES-T of about 0.25 kcal mol-1 for both meta-through-benzene connected diradicals.
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Affiliation(s)
- Agnieszka Bodzioch
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
| | | | - Rafał Jakubowski
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
| | | | - Anita Gardias
- Institute of Experimental Physics Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - Damian Trzybiński
- Biological and Chemical Research Centre, University of Warsaw, 02-089 Warsaw, Poland
| | - Paweł Tokarz
- Faculty of Chemistry, University of Łódź, 91-403 Łódź, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - Krzysztof Woźniak
- Biological and Chemical Research Centre, University of Warsaw, 02-089 Warsaw, Poland
| | - Piotr Kaszyński
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
- Faculty of Chemistry, University of Łódź, 91-403 Łódź, Poland
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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2
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Jańczuk ZZ, Jedrych A, Parzyszek S, Gardias A, Szczytko J, Wojcik M. Dynamically Tunable Assemblies of Superparamagnetic Nanoparticles Stabilized with Liquid Crystal-like Ligands in Organic Thin Films. Nanomaterials (Basel) 2023; 13:2908. [PMID: 37947752 PMCID: PMC10648093 DOI: 10.3390/nano13212908] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
The process of arranging magnetic nanoparticles (MNPs) into long-range structures that can be dynamically and reversibly controlled is challenging, although interesting for emerging spintronic applications. Here, we report composites of MNPs in excess of LC-like ligands as promising materials for MNP-based technologies. The organic part ensures the assembly of MNP into long-range ordered phases as well as precise and temperature-reversible control over the arrangement. The dynamic changes are fully reversible, which we confirm using X-ray diffraction (XRD). This methodology allows for the precise control of the nanomaterial's structure in a thin film at different temperatures, translating to variable unit cell parameters. The composition of the materials (XPS, TGA), their structure (XRD), and magnetic properties (SQUID) were performed. Overall, this study confirms that LC-like materials provide the ability to dynamically control the magnetic nanoparticles in thin films, particularly the reversible control of their self-organization.
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Affiliation(s)
- Zuzanna Z. Jańczuk
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Agnieszka Jedrych
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Sylwia Parzyszek
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
| | - Anita Gardias
- Faculty of Physics, University of Warsaw, 5 Pasteur Street, 02-093 Warsaw, Poland; (A.G.); (J.S.)
| | - Jacek Szczytko
- Faculty of Physics, University of Warsaw, 5 Pasteur Street, 02-093 Warsaw, Poland; (A.G.); (J.S.)
| | - Michal Wojcik
- Faculty of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland; (Z.Z.J.); (A.J.); (S.P.)
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3
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Camargo B, Zajcewa I, Pietrzak A, Obijalska E, Szczytko J, Kaszyński P. Thermally induced dimensionality changes in derivatives of a "super stable" Blatter radical. Phys Chem Chem Phys 2023; 25:22813-22818. [PMID: 37584108 DOI: 10.1039/d3cp01298k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
Two derivatives of a "super stable" Blatter radical (1,3-diphenyl-7-trifluoromethyl-1,4-dihydrobenzo[e][1,2,4]triazin-4-yl) with N(1)-Ar = 2-CF3C6H4 and 2-MeOC6H4 were obtained and investigated using XRD and SQUID magnetometry methods. The investigation revealed strong antiferromagnetic interactions in both radicals, which are described using the Hatfield model. For the latter radical, an abrupt and reversible change in the χ(T) plot was observed at 29 K. It was ascribed to a structural transition, consistent with a two-dimensional to one-dimensional thermally activated crossover, as supported by specific heat measurements (CvHvs. T). It is suggested that the transition is related to an order-disorder transition of the CF3 group, which is corroborated using XRD structural analysis.
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Affiliation(s)
- Bruno Camargo
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - Irina Zajcewa
- Institute of Physics, Polish Academy of Sciences, 02668 Warsaw, Poland
| | - Anna Pietrzak
- Faculty of Chemistry, Łódź University of Technology, 90-924 Łódź, Poland
| | | | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - Piotr Kaszyński
- Faculty of Chemistry, University of Łódź, 91-403 Łódź, Poland
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN, 37130, USA.
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4
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Pietrzyk P, Borowska EI, Hejduk P, Camargo BC, Warczak M, Nguyen TP, Pregowska A, Gniadek M, Szczytko J, Wilczewski S, Osial M. Green composites based on volcanic red algae Cyanidiales, cellulose, and coffee waste biomass modified with magnetic nanoparticles for the removal of methylene blue. Environ Sci Pollut Res Int 2023; 30:62689-62703. [PMID: 36944836 PMCID: PMC10167190 DOI: 10.1007/s11356-023-26425-3] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/08/2023] [Indexed: 05/10/2023]
Abstract
In this paper, green nanocomposites based on biomass and superparamagnetic nanoparticles were synthesized and used as adsorbents to remove methylene blue (MB) from water with magnetic separation. The adsorbents were synthesized through the wet co-precipitation technique, in which iron-oxide nanoparticles coated the cores based on coffee, cellulose, and red volcanic algae waste. The procedure resulted in materials that could be easily separated from aqueous solutions with magnets. The morphology and chemical composition of the nanocomposites were characterized by SEM, FT-IR, and XPS methods. The adsorption studies of MB removal with UV-vis spectrometry showed that the adsorption performance of the prepared materials strongly depended on their morphology and the type of the organic adsorbent. The adsorption studies presented the highest effectiveness in neutral pH with only a slight effect on ionic strength. The MB removal undergoes pseudo-second kinetics for all adsorbents. The maximal adsorption capacity for the coffee@Fe3O4-2, cellulose@Fe3O4-1, and algae@Fe3O4-1 is 38.23 mg g-1, 41.61 mg g-1, and 48.41 mg g-1, respectively. The mechanism of MB adsorption follows the Langmuir model using coffee@Fe3O4 and cellulose@Fe3O4, while for algae@Fe3O4 the process fits to the Redlich-Peterson model. The removal efficiency analysis based on UV-vis adsorption spectra revealed that the adsorption effectiveness of the nanocomposites increased as follows: coffee@Fe3O4-2 > cellulose@Fe3O4-1 > algae@Fe3O4-1, demonstrating an MB removal efficiency of up to 90%.
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Affiliation(s)
- Paulina Pietrzyk
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106, Warsaw, Poland
| | - Ewa Izabela Borowska
- The College of Inter-Faculty Individual Studies in Mathematics and Natural Sciences (MISMaP), University of Warsaw, Banacha 2C, 02-097, Warsaw, Poland
| | - Patrycja Hejduk
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Bruno Cury Camargo
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland
| | - Magdalena Warczak
- Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland
| | - Thu Phuong Nguyen
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, 10000, Vietnam
| | - Agnieszka Pregowska
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106, Warsaw, Poland
| | | | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland
| | - Sławomir Wilczewski
- Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland
| | - Magdalena Osial
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106, Warsaw, Poland.
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5
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Kokhanchik P, Solnyshkov D, Stöferle T, Piętka B, Szczytko J, Malpuech G. Modulated Rashba-Dresselhaus Spin-Orbit Coupling for Topology Control and Analog Simulations. Phys Rev Lett 2022; 129:246801. [PMID: 36563269 DOI: 10.1103/physrevlett.129.246801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/28/2022] [Indexed: 06/17/2023]
Abstract
We show theoretically that Rashba-Dresselhaus spin-orbit coupling (RDSOC) in lattices acts as a synthetic gauge field. This allows us to control both the phase and the magnitude of tunneling coefficients between sites, which is the key ingredient to implement topological Hamitonians and spin lattices useful for simulation perpectives. We use liquid crystal based microcavities in which RDSOC can be switched on and off as a model platform. We propose a realistic scheme for implementation of a Su-Schrieffer-Heeger chain in which the edge states existence can be tuned, and a Harper-Hofstadter model with a tunable contrasted flux for each (pseudo)spin component. We further show that a transverse-field Ising model and classical XY Hamiltonian with tunable parameters can be implemented, opening up prospects for analog physics, simulations, and optimization.
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Affiliation(s)
- Pavel Kokhanchik
- Institut Pascal, Université Clermont Auvergne, CNRS, Clermont INP, F-63000 Clermont-Ferrand, France
| | - Dmitry Solnyshkov
- Institut Pascal, Université Clermont Auvergne, CNRS, Clermont INP, F-63000 Clermont-Ferrand, France
- Institut Universitaire de France (IUF), 75231 Paris, France
| | - Thilo Stöferle
- IBM Research Europe-Zurich, CH-8803 Rüschlikon, Switzerland
| | - Barbara Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Guillaume Malpuech
- Institut Pascal, Université Clermont Auvergne, CNRS, Clermont INP, F-63000 Clermont-Ferrand, France
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6
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Łempicka-Mirek K, Król M, Sigurdsson H, Wincukiewicz A, Morawiak P, Mazur R, Muszyński M, Piecek W, Kula P, Stefaniuk T, Kamińska M, De Marco L, Lagoudakis PG, Ballarini D, Sanvitto D, Szczytko J, Piętka B. Electrically tunable Berry curvature and strong light-matter coupling in liquid crystal microcavities with 2D perovskite. Sci Adv 2022; 8:eabq7533. [PMID: 36197989 PMCID: PMC9534495 DOI: 10.1126/sciadv.abq7533] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/23/2022] [Indexed: 06/16/2023]
Abstract
The field of spinoptronics is underpinned by good control over photonic spin-orbit coupling in devices that have strong optical nonlinearities. Such devices might hold the key to a new era of optoelectronics where momentum and polarization degrees of freedom of light are interwoven and interfaced with electronics. However, manipulating photons through electrical means is a daunting task given their charge neutrality. In this work, we present electrically tunable microcavity exciton-polariton resonances in a Rashba-Dresselhaus spin-orbit coupling field. We show that different spin-orbit coupling fields and the reduced cavity symmetry lead to tunable formation of the Berry curvature, the hallmark of quantum geometrical effects. For this, we have implemented an architecture of a photonic structure with a two-dimensional perovskite layer incorporated into a microcavity filled with nematic liquid crystal. Our work interfaces spinoptronic devices with electronics by combining electrical control over both the strong light-matter coupling conditions and artificial gauge fields.
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Affiliation(s)
- Karolina Łempicka-Mirek
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Mateusz Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Helgi Sigurdsson
- Science Institute, University of Iceland, Dunhagi 3, IS-107 Reykjavik, Iceland
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
| | - Adam Wincukiewicz
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Przemysław Morawiak
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Rafał Mazur
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Marcin Muszyński
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Wiktor Piecek
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Przemysław Kula
- Institute of Chemistry, Military University of Technology, Warsaw, Poland
| | - Tomasz Stefaniuk
- Institute of Geophysics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Maria Kamińska
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Luisa De Marco
- CNR-Nanotec, Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
| | - Pavlos G. Lagoudakis
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
- Hybrid Photonics Laboratory, Skolkovo Institute of Science and Technology, Territory of Innovation Center Skolkovo, 6 Bolshoy Boulevard 30, Building 1, 121205 Moscow, Russia
| | - Dario Ballarini
- CNR-Nanotec, Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
| | - Daniele Sanvitto
- CNR-Nanotec, Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Barbara Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
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7
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Król M, Septembre I, Oliwa P, Kędziora M, Łempicka-Mirek K, Muszyński M, Mazur R, Morawiak P, Piecek W, Kula P, Bardyszewski W, Lagoudakis PG, Solnyshkov DD, Malpuech G, Piętka B, Szczytko J. Annihilation of exceptional points from different Dirac valleys in a 2D photonic system. Nat Commun 2022; 13:5340. [PMID: 36096889 PMCID: PMC9468178 DOI: 10.1038/s41467-022-33001-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/26/2022] [Indexed: 12/03/2022] Open
Abstract
Topological physics relies on Hamiltonian’s eigenstate singularities carrying topological charges, such as Dirac points, and – in non-Hermitian systems – exceptional points (EPs), lines or surfaces. So far, the reported non-Hermitian topological transitions were related to the creation of a pair of EPs connected by a Fermi arc out of a single Dirac point by increasing non-Hermiticity. Such EPs can annihilate by reducing non-Hermiticity. Here, we demonstrate experimentally that an increase of non-Hermiticity can lead to the annihilation of EPs issued from different Dirac points (valleys). The studied platform is a liquid crystal microcavity with voltage-controlled birefringence and TE-TM photonic spin-orbit-coupling. Non-Hermiticity is provided by polarization-dependent losses. By increasing the non-Hermiticity degree, we control the position of the EPs. After the intervalley annihilation, the system becomes free of any band singularity. Our results open the field of non-Hermitian valley-physics and illustrate connections between Hermitian topology and non-Hermitian phase transitions. The authors study a liquid crystal microcavity with polarization-dependent absorption, a source of non-Hermiticity. The transition in the Hermitian topology of the spin-orbit coupling makes possible the annihilation of exceptional points.
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Wrzesińska A, Khort A, Witkowski M, Szczytko J, Ryl J, Gurgul J, Kharitonov DS, Łątka K, Szumiata T, Wypych-Puszkarz A. Structural, electrical, and magnetic study of La-, Eu-, and Er- doped bismuth ferrite nanomaterials obtained by solution combustion synthesis. Sci Rep 2021; 11:22746. [PMID: 34815455 PMCID: PMC8610975 DOI: 10.1038/s41598-021-01983-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 11/08/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, the multiferroic bismuth ferrite materials Bi0.9RE0.1FeO3 doped by rare-earth (RE = La, Eu, and Er) elements were obtained by the solution combustion synthesis. Structure, electrical, and magnetic properties of prepared samples were investigated by X-ray photoelectron spectroscopy, Mössbauer spectroscopy, electrical hysteresis measurement, broadband dielectric spectroscopy, and SQUID magnetometry. All obtained nanomaterials are characterized by spontaneous electrical polarization, which confirmed their ferroelectric properties. Investigation of magnetic properties at 300.0 K and 2.0 K showed that all investigated Bi0.9RE0.1FeO3 ferrites possess significantly higher magnetization in comparison to bismuth ferrites obtained by different methods. The highest saturation magnetisation of 5.161 emu/g at 300.0 K was observed for the BLaFO sample, while at 2.0 K it was 12.07 emu/g for the BErFO sample. Several possible reasons for these phenomena were proposed and discussed.
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Affiliation(s)
| | - Alexander Khort
- KTH Royal Institute of Technology, Stockholm, Sweden. .,National University of Science and Technology "MISIS", Moscow, Russia.
| | | | - Jacek Szczytko
- University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Jacek Ryl
- Gdańsk University of Technology, 11/12 Narutowicza st, 80-233, Gdańsk, Poland
| | - Jacek Gurgul
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30239, Kraków, Poland
| | - Dmitry S Kharitonov
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30239, Kraków, Poland.,Research and Development Center of Technology for Industry, Ludwika Warynskiego 3A, 00645, Warsaw, Poland
| | - Kazimierz Łątka
- Marian Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348, Kraków, Poland
| | - Tadeusz Szumiata
- Kazimierz Pulaski University of Technology and Humanities in Radom, Stasieckiego Str. 54, 26-600, Radom, Poland
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9
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Król M, Rechcińska K, Sigurdsson H, Oliwa P, Mazur R, Morawiak P, Piecek W, Kula P, Lagoudakis PG, Matuszewski M, Bardyszewski W, Piętka B, Szczytko J. Realizing Optical Persistent Spin Helix and Stern-Gerlach Deflection in an Anisotropic Liquid Crystal Microcavity. Phys Rev Lett 2021; 127:190401. [PMID: 34797125 DOI: 10.1103/physrevlett.127.190401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Spin-orbit interactions which couple the spin of a particle with its momentum degrees of freedom lie at the center of spintronic applications. Of special interest in semiconductor physics are Rashba and Dresselhaus spin-orbit coupling. When equal in strength, the Rashba and Dresselhaus fields result in SU(2) spin rotation symmetry and emergence of the persistent spin helix only investigated for charge carriers in semiconductor quantum wells. Recently, a synthetic Rashba-Dresselhaus Hamiltonian was shown to describe cavity photons confined in a microcavity filled with optically anisotropic liquid crystal. In this Letter, we present a purely optical realization of two types of spin patterns corresponding to the persistent spin helix and the Stern-Gerlach experiment in such a cavity. We show how the symmetry of the Hamiltonian results in spatial oscillations of the spin orientation of photons traveling in the plane of the cavity.
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Affiliation(s)
- Mateusz Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Katarzyna Rechcińska
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Helgi Sigurdsson
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, building 1, Moscow 121205, Russia
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
- Science Institute, University of Iceland, Dunhagi 3, IS-107 Reykjavik, Iceland
| | - Przemysław Oliwa
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Rafał Mazur
- Institute of Applied Physics, Military University of Technology, Kaliskiego 2, PL-00-908 Warsaw, Poland
| | - Przemysław Morawiak
- Institute of Applied Physics, Military University of Technology, Kaliskiego 2, PL-00-908 Warsaw, Poland
| | - Wiktor Piecek
- Institute of Applied Physics, Military University of Technology, Kaliskiego 2, PL-00-908 Warsaw, Poland
| | - Przemysław Kula
- Institute of Chemistry, Military University of Technology, Kaliskiego 2, PL-00-908 Warsaw, Poland
| | - Pavlos G Lagoudakis
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, building 1, Moscow 121205, Russia
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Michał Matuszewski
- Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, PL-02-668 Warsaw, Poland
| | - Witold Bardyszewski
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Barbara Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02-093 Warsaw, Poland
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10
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Ciastek-Iskrzycka S, Szczytko J, Monobe H, Pociecha D, Jasiński M, Kaszyński P. Paramagnetic ionic liquid crystals: Ion conductive bent-core derivatives of stable radicals. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Żygieło M, Piotrowski P, Witkowski M, Cichowicz G, Szczytko J, Królikowska A. Reduced Self-Aggregation and Improved Stability of Silica-Coated Fe 3O 4/Ag SERS-Active Nanotags Functionalized With 2-Mercaptoethanesulfonate. Front Chem 2021; 9:697595. [PMID: 34222201 PMCID: PMC8241903 DOI: 10.3389/fchem.2021.697595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 04/19/2021] [Accepted: 05/31/2021] [Indexed: 11/13/2022] Open
Abstract
Nanocomposites combining magnetic and plasmonic properties are very attractive within the field of surface-enhanced Raman scattering (SERS) spectroscopy. Applications presented so far take advantage of not only the cooperation of both components but also synergy (enhanced properties), leading to multi-approach analysis. While many methods were proposed to synthesize such plasmonic-magnetic nanoparticles, the issue of their collective magnetic behavior, inducing irreversible self-aggregation, has not been addressed yet. Thus, here we present a simple and fast method to overcome this problem, employing 2-mercaptoethanesulfonate (MES) ions as both a SERS tag and primer molecules in the silica-coating process of the previously fabricated Fe3O4/Ag nanocomposite. The use of MES favored the formation of silica-coated nanomaterial comprised of well-dispersed small clusters of Fe3O4/Ag nanoparticles. Furthermore, adsorbed MES molecules provided a reliable SERS response, which was successfully detected after magnetic assembly of the Fe3O4/Ag@MES@SiO2 on the surface of the banknote. Improved chemical stability after coating with a silica layer was also found when the nanocomposite was exposed to suspension of yeast cells. This work reports on the application of 2-mercaptoethanesulfonate not only providing a photostable SERS signal due to a non-aromatic Raman reporter but also acting as a silica-coating primer and a factor responsible for a substantial reduction of the self-aggregation of the plasmonic-magnetic nanocomposite. Additionally, here obtained Fe3O4/Ag@MES@SiO2 SERS nanotags showed the potential as security labels for the authentication purposes, retaining its original SERS performance after deposition on the banknote.
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Affiliation(s)
- Maria Żygieło
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | | | | | | | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
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12
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Mirek R, Opala A, Comaron P, Furman M, Król M, Tyszka K, Seredyński B, Ballarini D, Sanvitto D, Liew TCH, Pacuski W, Suffczyński J, Szczytko J, Matuszewski M, Piętka B. Neuromorphic Binarized Polariton Networks. Nano Lett 2021; 21:3715-3720. [PMID: 33635656 PMCID: PMC8155323 DOI: 10.1021/acs.nanolett.0c04696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/23/2021] [Indexed: 06/12/2023]
Abstract
The rapid development of artificial neural networks and applied artificial intelligence has led to many applications. However, current software implementation of neural networks is severely limited in terms of performance and energy efficiency. It is believed that further progress requires the development of neuromorphic systems, in which hardware directly mimics the neuronal network structure of a human brain. Here, we propose theoretically and realize experimentally an optical network of nodes performing binary operations. The nonlinearity required for efficient computation is provided by semiconductor microcavities in the strong quantum light-matter coupling regime, which exhibit exciton-polariton interactions. We demonstrate the system performance against a pattern recognition task, obtaining accuracy on a par with state-of-the-art hardware implementations. Our work opens the way to ultrafast and energy-efficient neuromorphic systems taking advantage of ultrastrong optical nonlinearity of polaritons.
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Affiliation(s)
- Rafał Mirek
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Andrzej Opala
- Institute
of Physics, Polish Academy
of Sciences, Aleja Lotników
32/46, PL-02-668 Warsaw, Poland
| | - Paolo Comaron
- Institute
of Physics, Polish Academy
of Sciences, Aleja Lotników
32/46, PL-02-668 Warsaw, Poland
| | - Magdalena Furman
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Mateusz Król
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Krzysztof Tyszka
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Bartłomiej Seredyński
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Dario Ballarini
- CNR
NANOTEC−Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
| | - Daniele Sanvitto
- CNR
NANOTEC−Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
| | - Timothy C. H. Liew
- School
of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Wojciech Pacuski
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Jan Suffczyński
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Jacek Szczytko
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
| | - Michał Matuszewski
- Institute
of Physics, Polish Academy
of Sciences, Aleja Lotników
32/46, PL-02-668 Warsaw, Poland
| | - Barbara Piętka
- Institute
of Experimental Physics, Faculty of Physics,
University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland
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13
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Kamińska I, Wosztyl A, Kowalik P, Sikora B, Wojciechowski T, Sobczak K, Minikayev R, Zajdel K, Chojnacki M, Zaleszczyk W, Łysiak K, Paszkowicz W, Szczytko J, Frontczak-Baniewicz M, Stryczniewicz W, Fronc K. Synthesis and characterization of Gd 2O 3: Er 3+, Yb 3+doped with Mg 2+, Li +ions-effect on the photoluminescence and biological applications. Nanotechnology 2021; 32:245705. [PMID: 33690193 DOI: 10.1088/1361-6528/abed02] [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] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Gd2O3:1% Er3+, 18% Yb3+,x% Mg2+(x = 0; 2.5; 4; 5; 6; 8;10; 20; 25; 50) and Gd2O3:1% Er3+, 18% Yb3+, 2,5% Mg2+,y% Li+(y = 0.5-2.5) nanoparticles were synthesized by homogenous precipitation method and calcined at 900 °C for 3 h in air atmosphere. Powder x-ray diffraction, scanning electron microscopy, cathodoluminescence, transmission electron microscopy, energy dispersive x-ray spectroscopy and photoluminescence techniques were employed to characterize the obtained nanoparticles. We observed a 8-fold increase in red luminescence for samples suspended in DMSO solution for 2.5% of Mg2+doping. The x-ray analysis shows that for the concentration of 2.5% Mg, the size of the crystallites in the NPs is the largest, which is mainly responsible for the increase in the intensity of the upconversion luminescence. But the addition of Li+ions did not improve the luminescence of the upconversion due to decreasing of crystallites size of the NPs. Synthesized nanomaterials with very effective upconverting luminescence, can act as luminescent markers inin vivoimaging. The cytotoxicity of the nanoparticles was evaluated on the 4T1 cell line for the first time.
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Affiliation(s)
- Izabela Kamińska
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Aleksandra Wosztyl
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093, Poland
| | - Przemysław Kowalik
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Bożena Sikora
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Tomasz Wojciechowski
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Kamil Sobczak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, Warsaw 02-089, Poland
| | - Roman Minikayev
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Karolina Zajdel
- Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawińskiego 5, Warsaw 02-106, Poland
| | - Michał Chojnacki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Wojciech Zaleszczyk
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Katarzyna Łysiak
- Faculty of Physics, University of Warsaw, Ludwika Pasteura 5, 02-093, Poland
| | - Wojciech Paszkowicz
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, 02-093, Poland
| | | | - Wit Stryczniewicz
- Łukasiewicz Research Network-Institute of Aviation, al. Krakowska 110/114, Warsaw 02-256, Poland
| | - Krzysztof Fronc
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
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14
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Kamińska I, Jankowski D, Sikora B, Kowalik P, Minikayev R, Wojciechowski T, Chojnacki M, Sobczak K, Rybusiński J, Szczytko J, Zajdel K, Suchocki A, Paszkowicz W, Frontczak-Baniewicz M, Fronc K. Structural, optical and magnetic properties of Y 3-0.02-xEr 0.02Yb x Al 5O 12 (0 < x < 0.20) nanocrystals: effect of Yb content. Nanotechnology 2020; 31:225711. [PMID: 32032002 DOI: 10.1088/1361-6528/ab73b9] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The paramagnetic Y3-0.02-x Er0.02Yb x Al5O12 (x = 0.02, 0.06, 0.10, 0.12, 0.18, 0.20) nanocrystals (NCs) were synthesized by the microwave-induced solution combustion method. The XRD, TEM and SEM techniques were applied to determine the NCs' structures and sizes. The XRD patterns confirmed that the NCs have for the most part a regular structure of the Y3Al5O12 (YAG) phase. The changes of the distance between donor Yb3+ (sensitizer) and acceptor Er3+ (activator) were realized by changing the donor's concentration with a constant amount of acceptor. Under 980 nm excitation, at room temperature, the NCs exhibited strong red emission near 660 and 675 nm, and green upconversion emission at 550 nm, corresponding to the intra 4f transitions of Er3+ (4F9/2, 2H11/2, 4S3/2) → Er3+ (4I15/2). The strongest emission was observed in a sample containing 18% Yb3+ ions. The red and green emission intensities are respectively about 5 and 12 times higher as compared to NCs doped with 2% of Yb3+. In order to prove that the main factor responsible for the increase of the upconversion luminescence efficiency is reduction of the distance between Yb3+ and Er3+, we examined, for the first time the influence of hydrostatic pressure on luminescence and luminescence decay time of the radiative transitions inside donor ion. The decrease of both luminescence intensity and luminescence decay times, with increasing hydrostatic pressure was observed. After applying hydrostatic pressure to samples with e.g. 2% and 6% Yb3+, the distance between the donor and acceptor decreases. However, for higher concentrations of the donor, this distance is smaller, and this leads to the effective energy transfer to Er3+ ions. With increasing pressure, the maximum intensity of near infrared emission is observed at 1029, 1038 and 1047 nm, what corresponds to 2F5/2 → 2F7/2 transition of Yb3+.
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Affiliation(s)
- Izabela Kamińska
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Dawid Jankowski
- Research Foundation Baltic Institute of Technology, al. Zwycięstwa 96/98, 81-451 Gdynia, Poland
| | - Bożena Sikora
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Przemysław Kowalik
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Roman Minikayev
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Tomasz Wojciechowski
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- International Research Centre MagTop, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Michał Chojnacki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | - Kamil Sobczak
- University of Warsaw Biological and Chemical Research Centre, Żwirki i Wigury 101, Warsaw 02-089, Poland
| | - Jarosław Rybusiński
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Karolina Zajdel
- Mossakowski Medical Research Centre Polish Academy of Sciences, Pawińskiego 5, Warsaw 02-106, Poland
| | - Andrzej Suchocki
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
- Institute of Physics, Kazimierz Wielki University, Weyssenhoffa 11, 85-072, Bydgoszcz, Poland
| | - Wojciech Paszkowicz
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
| | | | - Krzysztof Fronc
- Institute of Physics Polish Academy of Sciences, al. Lotników 32/46, Warsaw 02-668, Poland
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15
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Kowalik P, Mikulski J, Borodziuk A, Duda M, Kamińska I, Zajdel K, Rybusinski J, Szczytko J, Wojciechowski T, Sobczak K, Minikayev R, Kulpa-Greszta M, Pazik R, Grzaczkowska P, Fronc K, Lapinski M, Frontczak-Baniewicz M, Sikora B. Yttrium-Doped Iron Oxide Nanoparticles for Magnetic Hyperthermia Applications. J Phys Chem C Nanomater Interfaces 2020; 124:6871-6883. [PMID: 32952770 PMCID: PMC7497709 DOI: 10.1021/acs.jpcc.9b11043] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/02/2020] [Indexed: 05/03/2023]
Abstract
Magnetic nanoparticles of Fe3O4 doped by different amounts of Y3+ (0, 0.1, 1, and 10%) ions were designed to obtain maximum heating efficiency in magnetic hyperthermia for cancer treatment. Single-phase formation was evident by X-ray diffraction measurements. An improved magnetization value was obtained for the Fe3O4 sample with 1% Y3+ doping. The specific absorption rate (SAR) and intrinsic loss of power (ILP) values for prepared colloids were obtained in water. The best results were estimated for Fe3O4 with 0.1% Y3+ ions (SAR = 194 W/g and ILP = 1.85 nHm2/kg for a magnetic field of 16 kA/m with the frequency of 413 kHz). The excellent biocompatibility with low cell cytotoxicity of Fe3O4:Y nanoparticles was observed. Immediately after magnetic hyperthermia treatment with Fe3O4:0.1%Y, a decrease in 4T1 cells' viability was observed (77% for 35 μg/mL and 68% for 100 μg/mL). These results suggest that nanoparticles of Fe3O4 doped by Y3+ ions are suitable for biomedical applications, especially for hyperthermia treatment.
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Affiliation(s)
- Przemyslaw Kowalik
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Jakub Mikulski
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Anna Borodziuk
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Magdalena Duda
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Izabela Kamińska
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Karolina Zajdel
- Mossakowski
Medical Research Centre, Polish Academy of Sciences, ul. Pawinskiego 5, PL-02106 Warsaw, Poland
| | - Jaroslaw Rybusinski
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02093 Warsaw, Poland
| | - Jacek Szczytko
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02093 Warsaw, Poland
| | - Tomasz Wojciechowski
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Kamil Sobczak
- Faculty
of Chemistry, Biological and Chemical Research Centre, University of Warsaw, ul. Zwirki i Wigury 101, PL-02089 Warsaw, Poland
| | - Roman Minikayev
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Magdalena Kulpa-Greszta
- Faculty
of Chemistry, Rzeszow University of Technology, Al. Powstancow Warszawy 12, PL-35959 Rzeszow, Poland
| | - Robert Pazik
- Faculty of
Biotechnology, University of Rzeszow, Ul. Pigonia 1, PL-35310 Rzeszow, Poland
| | - Paulina Grzaczkowska
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02093 Warsaw, Poland
| | - Krzysztof Fronc
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
| | - Mariusz Lapinski
- Department
of Hypertension, Medical University of Warsaw, ul. Zwirki i Wigury 61, PL-02091 Warsaw, Poland
| | | | - Bozena Sikora
- Institute
of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668 Warsaw, Poland
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16
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Rechcińska K, Król M, Mazur R, Morawiak P, Mirek R, Łempicka K, Bardyszewski W, Matuszewski M, Kula P, Piecek W, Lagoudakis PG, Piętka B, Szczytko J. Engineering spin-orbit synthetic Hamiltonians in liquid-crystal optical cavities. Science 2019; 366:727-730. [DOI: 10.1126/science.aay4182] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 10/15/2019] [Indexed: 11/02/2022]
Abstract
Spin-orbit interactions lead to distinctive functionalities in photonic systems. They exploit the analogy between the quantum mechanical description of a complex electronic spin-orbit system and synthetic Hamiltonians derived for the propagation of electromagnetic waves in dedicated spatial structures. We realize an artificial Rashba-Dresselhaus spin-orbit interaction in a liquid crystal–filled optical cavity. Three-dimensional tomography in energy-momentum space enabled us to directly evidence the spin-split photon mode in the presence of an artificial spin-orbit coupling. The effect is observed when two orthogonal linear polarized modes of opposite parity are brought near resonance. Engineering of spin-orbit synthetic Hamiltonians in optical cavities opens the door to photonic emulators of quantum Hamiltonians with internal degrees of freedom.
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Affiliation(s)
- Katarzyna Rechcińska
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Mateusz Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Rafał Mazur
- Institute of Applied Physics, Military University of Technology, ul. gen. S. Kaliskiego 2, 00-908 Warsaw, Poland
| | - Przemysław Morawiak
- Institute of Applied Physics, Military University of Technology, ul. gen. S. Kaliskiego 2, 00-908 Warsaw, Poland
| | - Rafał Mirek
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Karolina Łempicka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Witold Bardyszewski
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Michał Matuszewski
- Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Przemysław Kula
- Institute of Chemistry, Military University of Technology, ul. gen. S. Kaliskiego 2, 00-908 Warsaw, Poland
| | - Wiktor Piecek
- Institute of Applied Physics, Military University of Technology, ul. gen. S. Kaliskiego 2, 00-908 Warsaw, Poland
| | - Pavlos G. Lagoudakis
- Skolkovo Institute of Science and Technology, Skolkovo 143025, Russian Federation
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
| | - Barbara Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
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17
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Król M, Lekenta K, Mirek R, Łempicka K, Stephan D, Nogajewski K, Molas MR, Babiński A, Potemski M, Szczytko J, Piętka B. Valley polarization of exciton-polaritons in monolayer WSe 2 in a tunable microcavity. Nanoscale 2019; 11:9574-9579. [PMID: 31062800 DOI: 10.1039/c9nr02038a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Monolayer transition metal dichalcogenides, known for exhibiting strong excitonic resonances, constitute a very interesting and versatile platform for the investigation of light-matter interactions. In this work, we report on a strong coupling regime between excitons in monolayer WSe2 and photons confined in an open, voltage-tunable dielectric microcavity. The tunability of our system allows us to extend the exciton-polariton state over a wide energy range and, in particular, to bring the excitonic component of the lower polariton mode into resonance with other excitonic transitions in monolayer WSe2. We can retain up to 40% of initial circular polarization of the laser or loose it completely if polariton modes are brought into resonances with low energy excitonic modes.
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Affiliation(s)
- Mateusz Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland.
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18
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Jasiński M, Szymańska K, Gardias A, Pociecha D, Monobe H, Szczytko J, Kaszyński P. Tuning the Magnetic Properties of Columnar Benzo[e
][1,2,4]triazin-4-yls with the Molecular Shape. Chemphyschem 2019; 20:636-644. [DOI: 10.1002/cphc.201800965] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/19/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Marcin Jasiński
- Faculty of Chemistry; University of Łódź; Tamka 12 91-403 Łódź Poland
| | | | - Anita Gardias
- Institute of Experimental Physics, Faculty of Physics; University of Warsaw; Pasteura 5 02-093 Warsaw Poland
| | - Damian Pociecha
- Faculty of Chemistry; University of Warsaw; Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Hirosato Monobe
- National Institute of Advanced Industrial Science and Technology (AIST); Kansai Centre; Ikeda Osaka 563-8577 Japan
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics; University of Warsaw; Pasteura 5 02-093 Warsaw Poland
| | - Piotr Kaszyński
- Faculty of Chemistry; University of Łódź; Tamka 12 91-403 Łódź Poland
- Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112 90-363 Łódź Poland
- Department of Chemistry; Middle Tennessee State University; Murfreesboro TN 37132 USA
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19
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Lekenta K, Król M, Mirek R, Łempicka K, Stephan D, Mazur R, Morawiak P, Kula P, Piecek W, Lagoudakis PG, Piętka B, Szczytko J. Tunable optical spin Hall effect in a liquid crystal microcavity. Light Sci Appl 2018; 7:74. [PMID: 30323926 PMCID: PMC6177461 DOI: 10.1038/s41377-018-0076-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 09/14/2018] [Accepted: 09/23/2018] [Indexed: 05/31/2023]
Abstract
The spin Hall effect, a key enabler in the field of spintronics, underlies the capability to control spin currents over macroscopic distances. The effect was initially predicted by D'Yakonov and Perel1 and has been recently brought to the foreground by its realization in paramagnetic metals by Hirsch2 and in semiconductors3 by Sih et al. Whereas the rapid dephasing of electrons poses severe limitations to the manipulation of macroscopic spin currents, the concept of replacing fermionic charges with neutral bosons such as photons in stratified media has brought some tangible advances in terms of comparatively lossless propagation and ease of detection4-7. These advances have led to several manifestations of the spin Hall effect with light, ranging from semiconductor microcavities8,9 to metasurfaces10. To date the observations have been limited to built-in effective magnetic fields that underpin the formation of spatial spin currents. Here we demonstrate external control of spin currents by modulating the splitting between transverse electric and magnetic fields in liquid crystals integrated in microcavities.
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Affiliation(s)
- Katarzyna Lekenta
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Mateusz Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Rafał Mirek
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Karolina Łempicka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Daniel Stephan
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Rafał Mazur
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Przemysław Morawiak
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Przemysław Kula
- Institute of Chemistry, Military University of Technology, Warsaw, Poland
| | - Wiktor Piecek
- Institute of Applied Physics, Military University of Technology, Warsaw, Poland
| | - Pavlos G. Lagoudakis
- Department of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ UK
- Skolkovo Institute of Science and Technology Novaya St.,100, Skolkovo, 143025 Russian Federation
| | - Barbara Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
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20
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Skwierczyńska M, Runowski M, Goderski S, Szczytko J, Rybusiński J, Kulpiński P, Lis S. Luminescent-Magnetic Cellulose Fibers, Modified with Lanthanide-Doped Core/Shell Nanostructures. ACS Omega 2018; 3:10383-10390. [PMID: 31459166 PMCID: PMC6645153 DOI: 10.1021/acsomega.8b00965] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/15/2018] [Indexed: 05/30/2023]
Abstract
Novel luminescent-magnetic cellulose microfibers were prepared by a dry-wet spinning method with the use of N-methylmorpholine-N-oxide. The synthesized luminescent-magnetic core/shell type nanostructures, based on the lanthanide-doped fluorides and magnetite nanoparticles (NPs)-Fe3O4/SiO2/NH2/PAA/LnF3, were used as nanomodifiers of the fibers. Thanks to the successful incorporation of the bifunctional nanomodifiers into the cellulose structure, the functionalized fibers exhibited superior properties, that is, bright multicolor emission under UV light and strong magnetic response. By the use of the as-prepared fibers, the luminescent-magnetic thread was fabricated and used to sew and make a unique pattern in the glove material, as a proof of concept for advanced, multimodal cloths'/materials' protection against counterfeiting. The presence and uniform distribution of the modifier NPs in the polymer matrix were confirmed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray analysis (EDX). The concentration of the modifier NPs in the fibers was determined by inductively coupled plasma mass spectrometry, EDX, and magnetic measurements. The luminescence characteristics of the materials were examined by photoluminescence spectroscopy, and their magnetic field-responsive behavior was investigated by a superconducting quantum interference device.
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Affiliation(s)
- Małgorzata Skwierczyńska
- Faculty
of Chemistry, Department of Rare Earths, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland
| | - Marcin Runowski
- Faculty
of Chemistry, Department of Rare Earths, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland
| | - Szymon Goderski
- Faculty
of Chemistry, Department of Rare Earths, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland
| | - Jacek Szczytko
- Faculty
of Physics, Institute of Experimental Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Jarosław Rybusiński
- Faculty
of Physics, Institute of Experimental Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Piotr Kulpiński
- Department
of Man-Made Fibers, Technical University
of Lodz, Żeromskiego 116, 90-924 Lodz, Poland
| | - Stefan Lis
- Faculty
of Chemistry, Department of Rare Earths, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland
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21
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Bartel M, Wysocka B, Krug P, Kępińska D, Kijewska K, Blanchard GJ, Kaczyńska K, Lubelska K, Wiktorska K, Głowala P, Wilczek M, Pisarek M, Szczytko J, Twardowski A, Mazur M. Magnetic polymer microcapsules loaded with Nile Red fluorescent dye. Spectrochim Acta A Mol Biomol Spectrosc 2018; 195:148-156. [PMID: 29414572 DOI: 10.1016/j.saa.2018.01.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 09/25/2017] [Revised: 12/25/2017] [Accepted: 01/19/2018] [Indexed: 06/08/2023]
Abstract
Fabrication of multifunctional smart vehicles for drug delivery is a fascinating challenge of multidisciplinary research at the crossroads of materials science, physics and biology. We demonstrate a prototypical microcapsule system that is capable of encapsulating hydrophobic molecules and at the same time reveals magnetic properties. The microcapsules are prepared using a templated synthesis approach where the molecules to be encapsulated (Nile Red) are present in the organic droplets that are suspended in the polymerization solution which also contains magnetic nanoparticles. The polymer (polypyrrole) grows on the surface of organic droplets encapsulating the fluorescent dye in the core of the formed microcapsule which incorporates the nanoparticles into its wall. For characterization of the resulting structures a range of complementary physicochemical methodology is used including optical and electron microscopy, magnetometry, 1H NMR and spectroscopy in the visible and X-ray spectral ranges. Moreover, the microcapsules have been examined in biological environment in in vitro and in vivo studies.
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Affiliation(s)
- Marta Bartel
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Barbara Wysocka
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Pamela Krug
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Daria Kępińska
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Krystyna Kijewska
- Michigan State University, Department of Chemistry, East Lansing, MI 48824-1322, USA
| | - Gary J Blanchard
- Michigan State University, Department of Chemistry, East Lansing, MI 48824-1322, USA
| | - Katarzyna Kaczyńska
- Laboratory of Respiration Physiology, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawińskiego 5, 02-106 Warsaw, Poland
| | | | | | - Paulina Głowala
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Marcin Wilczek
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland
| | - Marcin Pisarek
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Andrzej Twardowski
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Maciej Mazur
- University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland.
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22
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Gardias A, Kaszyński P, Obijalska E, Trzybiński D, Domagała S, Woźniak K, Szczytko J. Magnetostructural Investigation of Orthogonal 1‐Aryl‐3‐Phenyl‐1,4‐Dihydrobenzo[
e
][1,2,4]triazin‐4‐yl Derivatives. Chemistry 2017; 24:1317-1329. [DOI: 10.1002/chem.201703576] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/24/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Anita Gardias
- Institute of Experimental Physics Faculty of Physics University of Warsaw Pasteura 5 02-093 Warsaw Poland
| | - Piotr Kaszyński
- Centre for Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Łódź Poland
- Faculty of Chemistry University of Łódź Tamka 12 91-403 Łódź Poland
- Department of Chemistry Middle Tennessee State University Murfreesboro TN 37-132 USA
| | - Emilia Obijalska
- Faculty of Chemistry University of Łódź Tamka 12 91-403 Łódź Poland
| | - Damian Trzybiński
- Biological and Chemical Research Centre University of Warsaw 02-093 Warsaw Poland
| | - Sławomir Domagała
- Biological and Chemical Research Centre University of Warsaw 02-093 Warsaw Poland
| | - Krzysztof Woźniak
- Biological and Chemical Research Centre University of Warsaw 02-093 Warsaw Poland
| | - Jacek Szczytko
- Institute of Experimental Physics Faculty of Physics University of Warsaw Pasteura 5 02-093 Warsaw Poland
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23
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Sikora B, Kowalik P, Mikulski J, Fronc K, Kamińska I, Szewczyk M, Konopka A, Zajdel K, Minikayev R, Sobczak K, Zaleszczyk W, Borodziuk A, Rybusiński J, Szczytko J, Sienkiewicz A, Wojciechowski T, Stępień P, Frontczak-Baniewicz M, Łapiński M, Wilczyński G, Paszkowicz W, Twardowski A, Elbaum D. Mammalian cell defence mechanisms against the cytotoxicity of NaYF 4:(Er,Yb,Gd) nanoparticles. Nanoscale 2017; 9:14259-14271. [PMID: 28914943 DOI: 10.1039/c7nr03705h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Water-soluble upconversion nanoparticles (UCNPs), based on polyvinylpyrrolidone (PVP)-coated NaYF4:Er3+,Yb3+,Gd3+, with various concentrations of Gd3+ ions and relatively high upconversion efficiencies, were synthesized. The internalization and cytotoxicity of the thus obtained UCNPs were evaluated in three cell lines (HeLa, HEK293 and astrocytes). No cytotoxicity was observed even at concentrations of UCNPs up to 50 μg ml-1. The fate of the UCNPs within the cells was studied by examining their upconversion emission spectra with confocal microscopy and confirming these observations with transmission electron microscopy. It was found that the cellular uptake of the UCNPs occurred primarily by clathrin-mediated endocytosis, whereas they were secreted from the cells via lysosomal exocytosis. The results of this study, focused on the mechanisms of the cellular uptake, localization and secretion of UCNPs, demonstrate, for the first time, the co-localization of UCNPs within discrete cell organelles.
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Affiliation(s)
- B Sikora
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 42/46, PL-02668, Warsaw, Poland.
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24
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Piętka B, Bobrovska N, Stephan D, Teich M, Król M, Winnerl S, Pashkin A, Mirek R, Lekenta K, Morier-Genoud F, Schneider H, Deveaud B, Helm M, Matuszewski M, Szczytko J. Doubly Dressed Bosons: Exciton Polaritons in a Strong Terahertz Field. Phys Rev Lett 2017; 119:077403. [PMID: 28949662 DOI: 10.1103/physrevlett.119.077403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate the existence of a novel quasiparticle, an exciton in a semiconductor doubly dressed with two photons of different wavelengths: a near infrared cavity photon and terahertz (THz) photon, with the THz coupling strength approaching the ultrastrong coupling regime. This quasiparticle is composed of three different bosons, being a mixture of a matter-light quasiparticle. Our observations are confirmed by a detailed theoretical analysis, treating quantum mechanically all three bosonic fields. The doubly dressed quasiparticles retain the bosonic nature of their constituents, but their internal quantum structure strongly depends on the intensity of the applied terahertz field.
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Affiliation(s)
- B Piętka
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - N Bobrovska
- The Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - D Stephan
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - M Teich
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - M Król
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - S Winnerl
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - A Pashkin
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - R Mirek
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - K Lekenta
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - F Morier-Genoud
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 3, 1015 Lausanne, Switzerland
| | - H Schneider
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - B Deveaud
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 3, 1015 Lausanne, Switzerland
- Ecole Polytechnique, F-91128 Palaiseau, France
| | - M Helm
- Institute of Ion Beam Physics and Materials Research, HZDR, P.O. Box 510119, 01314 Dresden, Germany
| | - M Matuszewski
- The Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - J Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
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25
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Jasiński M, Szczytko J, Pociecha D, Monobe H, Kaszyński P. Substituent-Dependent Magnetic Behavior of Discotic Benzo[e][1,2,4]triazinyls. J Am Chem Soc 2016; 138:9421-4. [DOI: 10.1021/jacs.6b06444] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Marcin Jasiński
- Faculty
of Chemistry, University of Łódź, Tamka 12, 91-403 Łódź, Poland
| | - Jacek Szczytko
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - Damian Pociecha
- Department
of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Hirosato Monobe
- National Institute of Advanced Industrial Science and Technology (AIST), Kansai Centre, Ikeda, Osaka 563-8577, Japan
| | - Piotr Kaszyński
- Faculty
of Chemistry, University of Łódź, Tamka 12, 91-403 Łódź, Poland
- Center
for Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
- Department
of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37-132, United States
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26
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Jasiński M, Pociecha D, Monobe H, Szczytko J, Kaszyński P. Tetragonal Phase of 6-Oxoverdazyl Bent-Core Derivatives with Photoinduced Ambipolar Charge Transport and Electrooptical Effects. J Am Chem Soc 2014; 136:14658-61. [PMID: 25285393 DOI: 10.1021/ja507594h] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Marcin Jasiński
- Faculty
of Chemistry, University of Łódź, Tamka 12, 91403 Łódź, Poland
| | - Damian Pociecha
- Department
of Chemistry, University of Warsaw, 02-089 Warsaw, Poland
| | - Hirosato Monobe
- Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
| | - Jacek Szczytko
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża
69, 00-681 Warsaw, Poland
| | - Piotr Kaszyński
- Faculty
of Chemistry, University of Łódź, Tamka 12, 91403 Łódź, Poland
- Organic
Materials Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
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27
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Szczytko J, Vaupotič N, Osipov MA, Madrak K, Górecka E. Effect of dimerization on the field-induced birefringence in ferrofluids. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 87:062322. [PMID: 23848690 DOI: 10.1103/physreve.87.062322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Indexed: 06/02/2023]
Abstract
The magnetic-field-induced birefringence in a ferrofluid composed of spherical cobalt nanoparticles has been studied both experimentally and theoretically. The considerable induced birefringence determined experimentally has been attributed to the formation of chains of nanoparticles. The birefringence has been measured as a function of the external magnetic field and the volume fraction (f) of nanoparticles. It is quadratic in f as opposed to the Faraday effect, which is linear in f. Experimental results agree well with the theoretical model based on a simple density functional approach. For dilute solutions the experimental results can be explained by assuming that only dimers of nanoparticles are formed while the concentration of longer chains is negligible.
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Affiliation(s)
- Jacek Szczytko
- Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoza 69, 00-681 Warsaw, Poland.
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28
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Jankowiak A, Pociecha D, Monobe H, Szczytko J, Dębska Ż, Romański J, Kaszyński P. Induction of Columnar Discotic Behavior in Verdazyl Radicals with Alkylsulfanyl Substituents. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.736896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Aleksandra Jankowiak
- a Department of Chemistry , Vanderbilt University , Nashville , TN , 37235 , USA
| | - Damian Pociecha
- b Department of Chemistry , University of Warsaw , 02-089 Warsaw , Poland
| | - Hirosato Monobe
- c Faculty of Physics , University of Warsaw , Hoża 69, 00-681 Warsaw , Poland
| | - Jacek Szczytko
- d National Institute of Advanced Industrial Science and Technology, AIST Kansai Centre , Ikeda , Osaka 563-8577 , Japan
| | - Żaneta Dębska
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
| | - Jarosław Romański
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
| | - Piotr Kaszyński
- a Department of Chemistry , Vanderbilt University , Nashville , TN , 37235 , USA
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
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29
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Kijewska K, Jarzębińska A, Kowalska J, Jemielity J, Kępińska D, Szczytko J, Pisarek M, Wiktorska K, Stolarski J, Krysiński P, Twardowski A, Mazur M. Magnetic-nanoparticle-decorated polypyrrole microvessels: toward encapsulation of mRNA cap analogues. Biomacromolecules 2013; 14:1867-76. [PMID: 23597098 DOI: 10.1021/bm400250g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Many phosphorylated nucleoside derivatives have therapeutic potential, but their application is limited by problems with membrane permeability and with intracellular delivery. Here, we prepared polypyrrole microvessel structures modified with superparamagnetic nanoparticles for use as potential carriers of nucleotides. The microvessels were prepared via the photochemical polymerization of the monomer onto the surface of aqueous ferrofluidic droplets. A complementary physicochemical analysis revealed that a fraction of the nanoparticles was embedded in the microvessel walls, while the other nanoparticles were in the core of the vessel. SQUID (superconducting quantum interference device) measurements indicated that the incorporated nanoparticles retained their superparamagnetic properties; thus, the resulting nanoparticle-modified microvessels can be directed by an external magnetic field. As a result of these features, these microvessels may be useful as drug carriers in biomedical applications. To demonstrate the encapsulation of drug molecules, two labeled mRNA cap analogues, nucleotide-derived potential anticancer agents, were used. It was shown that the cap analogues are located in the aqueous core of the microvessels and can be released to the external solution by spontaneous permeation through the polymer walls. Mass spectrometry analysis confirmed that the cap analogues were preserved during encapsulation, storage, and release. This finding provides a foundation for the future development of anticancer therapies and for the delivery of nucleotide-based therapeutics.
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Affiliation(s)
- Krystyna Kijewska
- Department of Chemistry, University of Warsaw , Pasteura 1, 02-093 Warsaw, Poland
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30
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Jankowiak A, Pociecha D, Szczytko J, Monobe H, Kaszyński P. Photoconductive Liquid-Crystalline Derivatives of 6-Oxoverdazyl. J Am Chem Soc 2012; 134:2465-8. [DOI: 10.1021/ja209467h] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aleksandra Jankowiak
- Organic Materials
Research Group,
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Damian Pociecha
- Department of Chemistry, University of Warsaw, 02-089 Warsaw, Poland
| | - Jacek Szczytko
- Institute of Experimental Physics,
Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
| | - Hirosato Monobe
- Research Institute for Ubiquitous
Energy Devices, National Institute of Advanced Industrial Science and Technology, AIST Kansai Centre, Ikeda, Osaka
563-8577, Japan
| | - Piotr Kaszyński
- Organic Materials
Research Group,
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Faculty
of Chemistry, University of Łódź, Tamka 12, 91-403
Łódź, Poland
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31
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32
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Portella-Oberli MT, Berney J, Kappei L, Morier-Genoud F, Szczytko J, Deveaud-Plédran B. Dynamics of Trion formation in InxGa1-xAs quantum wells. Phys Rev Lett 2009; 102:096402. [PMID: 19392539 DOI: 10.1103/physrevlett.102.096402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Revised: 01/23/2009] [Indexed: 05/27/2023]
Abstract
We show a double path mechanism for the formation of charged excitons (trions); they are formed through bi- and trimolecular processes. This directly implies that both negatively and positively charged excitons coexist in a quantum well, even in the absence of excess carriers. The model is substantiated by time-resolved photoluminescence experiments performed on a very high quality InxGa1-xAs quantum well sample, in which the photoluminescence contributions at the energy of the trion and exciton and at the band edge can be clearly separated and traced over a broad range of times and densities. The unresolved discrepancy between the theoretical and experimental radiative decay time of the exciton in a doped semiconductor quantum well is explained by the same model.
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Affiliation(s)
- M T Portella-Oberli
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH1015 Lausanne, Switzerland
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33
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Głębowska A, Kamieńska-Trela K, Krówczyński A, Pociecha D, Szydłowska J, Szczytko J, Twardowski A, Wójcik J, Górecka E. Mesogenic Ni(ii) and Cu(ii) complexes of barbituric acid derivatives—toward one-dimensional magnets. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b807656a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Deveaud B, Kappei L, Berney J, Morier-Genoud F, Portella-Oberli M, Szczytko J, Piermarocchi C. Excitonic effects in the luminescence of quantum wells. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2005.06.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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35
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Kappei L, Szczytko J, Morier-Genoud F, Deveaud B. Direct observation of the mott transition in an optically excited semiconductor quantum well. Phys Rev Lett 2005; 94:147403. [PMID: 15904111 DOI: 10.1103/physrevlett.94.147403] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2004] [Indexed: 05/02/2023]
Abstract
We have studied density-dependent time-resolved photoluminescence from a 80 A InGaAs/GaAs single quantum well excited by picosecond pulses. We succeed in giving evidence for the transition from an exciton-dominated population to an unbound electron-hole pair population as the pair density increases. For pair densities below this excitonic Mott transition we observe a spectrally separate emission from free electron-hole pairs in addition to excitonic luminescence, thereby proving the coexistence of both species. Exciton binding energy and band gap remain unchanged even near the upper bound of this coexistence region. Above the Mott density we observe a purely exponential high energy tail of the photoluminescence and a redshift of the band gap with pair density. The transition occurs gradually between 1 x 10(10) and 1 x 10(11) cm(-2) at the carrier temperatures of our experiment.
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Affiliation(s)
- L Kappei
- Ecole Polytechnique Fédérale de Lausanne, EPFL, CH-1015 Lausanne, Switzerland
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Szczytko J, Kappei L, Berney J, Morier-Genoud F, Portella-Oberli MT, Deveaud B. Determination of the exciton formation in quantum wells from time-resolved interband luminescence. Phys Rev Lett 2004; 93:137401. [PMID: 15524755 DOI: 10.1103/physrevlett.93.137401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2003] [Indexed: 05/24/2023]
Abstract
We present the results of a detailed time-resolved luminescence study carried out on a very high quality InGaAs quantum well sample where the contributions at the energy of the exciton and at the band edge can be clearly separated. We perform this experiment with a spectral resolution and a sensitivity of the setup, allowing us to keep the observation of these two separate contributions over a broad range of times and densities. This allows us to directly evidence the exciton formation time, which depends on the density as expected from theory. We also denote the dominant contribution of excitons to the luminescence signal, and the lack of thermodynamical equilibrium at low densities.
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Affiliation(s)
- J Szczytko
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH1015 Lausanne, Switzerland
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Affiliation(s)
- J. Szczytko
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
| | - L. Kappei
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
| | - F. Morier‐Genoud
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
| | - T. Guillet
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
| | - M. T. Portella‐Oberli
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
| | - B. Deveaud
- Institut de Photonique et Electronique Quantiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne, Switzerland
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