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Parauha YR, Dhoble SJ. Structural and photoluminescence properties of Dy 3+ -activated NaCaPO 4 phosphor derived from solution combustion. LUMINESCENCE 2021; 37:141-152. [PMID: 34738699 DOI: 10.1002/bio.4155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/23/2021] [Accepted: 10/27/2021] [Indexed: 01/07/2023]
Abstract
In the current investigation, a series of NaCa1-x PO4 :xDy3+ (x = 0.1, 0.3, 0.5, 0.7, 1.0, 1.5 and 2 mol%) phosphors were synthesized using a solution combustion method and citric acid as fuel. The investigated results from the X-ray diffraction (XRD) pattern showed phase purity of the synthesized material and orthorhombic crystal structure with space group Pna21. Photoluminescence properties of the synthesized phosphors were investigated. The synthesized Dy3+ -activated phosphor displayed blue (482 nm) and yellow (576 nm) emission under near-ultraviolet or blue excitations. These emission bands were ascribed due to the 4 F9/2 →6 H15/2 and 4 F9/2 →6 H13/2 transitions of Dy3+ ions. Commission International de l'Eclairage chromaticity coordinates showed emission in the near-white region for the proposed phosphors under different excitations. In addition, the current-voltage (I-V) characteristics of the NaCa1-x PO4 :xDy3+ (x = 1.5 mol%) phosphor-coated silicon solar cell and an uncoated solar cell were investigated under a solar simulator. The I-V characteristics of the proposed phosphor-coated silicon solar cell showed enhancement in solar cell efficiency by ~7.92%. The entire studies and their outcomes showed that synthesized phosphors have potential as white light emitting diodes and for solar applications.
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Targonska S, Wiglusz RJ. Investigation of Physicochemical Properties of the Structurally Modified Nanosized Silicate-Substituted Hydroxyapatite Co-Doped with Eu 3+ and Sr 2+ Ions. NANOMATERIALS 2020; 11:nano11010027. [PMID: 33374328 PMCID: PMC7823659 DOI: 10.3390/nano11010027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/10/2020] [Accepted: 12/16/2020] [Indexed: 01/26/2023]
Abstract
In this paper, a series of structurally modified silicate-substituted apatite co-doped with Sr2+ and Eu3+ ions were synthesized by a microwave-assisted hydrothermal method. The concentration of Sr2+ ions was set at 2 mol% and Eu3+ ions were established in the range of 0.5–2 mol% in a molar ratio of calcium ion amount. The XRD (X-ray powder diffraction) technique and infrared (FT-IR) spectroscopy were used to characterize the obtained materials. The Kröger–Vink notation was used to explain the possible charge compensation mechanism. Moreover, the study of the spectroscopic properties (emission, emission excitation and emission kinetics) of the obtained materials as a function of optically active ions and annealing temperature was carried out. The luminescence behavior of Eu3+ ions in the apatite matrix was verified by the Judd–Ofelt (J-O) theory and discussed in detail. The temperature-dependent emission spectra were recorded for the representative materials. Furthermore, the International Commission on Illumination (CIE) chromaticity coordinates and correlated color temperature were determined by the obtained results.
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Affiliation(s)
- Sara Targonska
- Correspondence: (S.T.); (R.J.W.); Tel.: +48-071-3954-159 (R.J.W.)
| | - Rafal J. Wiglusz
- Correspondence: (S.T.); (R.J.W.); Tel.: +48-071-3954-159 (R.J.W.)
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Szyszka K, Watras A, Wiglusz RJ. Strontium Phosphate Composite Designed to Red-Emission at Different Temperatures. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4468. [PMID: 33050186 PMCID: PMC7650610 DOI: 10.3390/ma13204468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 09/29/2020] [Accepted: 10/06/2020] [Indexed: 11/17/2022]
Abstract
Eu3+-doped Sr10(PO4)6(OH)2-Sr3(PO4)2 (SrHAp-TSP) composites were obtained via the microwave-stimulated hydrothermal method and post-heat-treated from 750 to 950 °C. Concentration of the Eu3+ ions was set to be 0.5, 1, 2, 3, 5 mol% in a ratio of the strontium ions molar content. The structural and morphological properties were investigated by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FT-IR) techniques. The average particle size of the studied materials annealed at 750, 850 and 950 °C were counted about 100, 131 and 173 nm, respectively. The luminescence properties depending on the dopant ion concentration, heat-treatment temperature, excitation wavelength and temperature were investigated. In the emission spectra, a broad peak corresponding to the 4f65d1 → 4f7 (8S7/2) emission of Eu2+ ions as well as narrow 4f-4f transitions typical for Eu3+ ions can be observed. The luminescence intensity of the 1 mol% Eu3+:Sr10(PO4)6(OH)2-Sr3(PO4)2 was measured depending on the ambient temperature in the range of 80-550 K. The CIE 1931 (International Commission on Illumination) chromaticity diagram was determined from emission spectra measured in 80, 300 and 550 K. The reduction mechanism of the Eu3+ to the Eu2+ was explained by the charge compensation mechanism based on the Kröger-Vink-notation. The decay times were measured and the Judd-Ofelt (J-O) theory was applied to analyze the observed structural and spectroscopic features.
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Affiliation(s)
- Katarzyna Szyszka
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland;
| | | | - Rafal J. Wiglusz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland;
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Targonska S, Sikora M, Marycz K, Smieszek A, Wiglusz RJ. Theranostic Applications of Nanostructured Silicate-Substituted Hydroxyapatite Codoped with Eu 3+ and Bi 3+ Ions-A Novel Strategy for Bone Regeneration. ACS Biomater Sci Eng 2020; 6:6148-6160. [PMID: 33449662 DOI: 10.1021/acsbiomaterials.0c00824] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this paper, nanocrystalline silicate-substituted hydroxyapatites (nSi-HAps) codoped with Eu3+ were functionalized with Bi3+ ions. Biomaterials were synthesized using a microwave-assisted hydrothermal method and heat-treated at 700 °C. The concentration of Eu3+ ions was established at 1 mol %, and the concentration of Bi3+ was in the range of 0.5-2 mol %. The physicochemical properties of the obtained biomaterials were determined using previously established methods, including X-ray powder diffraction, scanning electron microscopy techniques, and IR spectroscopy. Particle sizes obtained in this study were in the range of 22-65 nm, which was established by the Rietveld method. The luminescence properties of the Eu3+ ion-doped silicate-substituted apatite were recorded depending on the bismuth(III) concentration. The cytocompatibility of obtained biomaterials was tested using the model of mouse pre-osteoblasts cell line, that is, MC3T3-E1. We showed that the obtained biomaterials exerted anti-apoptotic effect, reducing the number of early and late apoptotic cells and decreasing caspase activity and reactive oxygen species accumulation. The transcripts levels of genes associated with apoptosis confirmed the anti-apoptotic effect of the biomaterials. Increased metabolic activity of MC3T3-E1 in cultures with biomaterials functionalized with Bi3+ ions has been observed. Moreover, the determined profile of osteogenic markers indicates that the obtained matrices, that is, Eu3+:nSi-HAp functionalized with Bi3+ ions, exert pro-osteogenic properties. The biological features of Eu3+:nSi-HAp modified with Bi3+ ions are highly desired in terms of functional tissue restoration and further efficient osteointegration.
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Affiliation(s)
- Sara Targonska
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
| | - Mateusz Sikora
- The Department of Experimental Biology, The Faculty of Biology and Animal Science, University of Environmental and Life Sciences Wroclaw, 38C Chelmonskiego Street, 50-630 Wroclaw, Poland
| | - Krzysztof Marycz
- The Department of Experimental Biology, The Faculty of Biology and Animal Science, University of Environmental and Life Sciences Wroclaw, 38C Chelmonskiego Street, 50-630 Wroclaw, Poland.,International Institute of Translational Medicine, Jesionowa 11 Street, 55-124 Malin, Poland.,Collegium Medicum, Institute of Medical Science, Cardinal Stefan Wyszynski University (UKSW), Woycickiego 1/3, 01-938 Warsaw, Poland
| | - Agnieszka Smieszek
- The Department of Experimental Biology, The Faculty of Biology and Animal Science, University of Environmental and Life Sciences Wroclaw, 38C Chelmonskiego Street, 50-630 Wroclaw, Poland
| | - Rafal J Wiglusz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland.,Centre for Advanced Materials and Smart Structures, Polish Academy of Sciences, Okolna 2, 50-950 Wroclaw, Poland
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Targonska S, Rewak-Soroczynska J, Piecuch A, Paluch E, Szymanski D, Wiglusz RJ. Preparation of a New Biocomposite Designed for Cartilage
Grafting with Antibiofilm Activity. ACS OMEGA 2020; 5:24546-24557. [PMID: 33015472 PMCID: PMC7528337 DOI: 10.1021/acsomega.0c03044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/28/2020] [Indexed: 05/05/2023]
Abstract
![]()
New
polymer–inorganic composites with antibiofilm features
based on the granulated poly(tetrafluoroethylene) (PTFE) and apatite
materials were obtained using a standard hydraulic press. The study
was performed in hydroxy- and fluorapatites doped with different amounts
of silver ions and followed by heat treatment at 600 °C. The
structural, morphological, and physicochemical properties were determined
by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR)
spectroscopy, scanning electron microscopy-energy-dispersive spectrometry
(SEM-EDS), and transition electron microscopy (TEM). The antibacterial
properties of the obtained materials were evaluated against Gram-negative
pathogens such as Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli as well as against Gram-positive
bacteria Staphylococcus epidermidis. The cytotoxicity assessment was carried out on the red blood cells
(RBC) as a cell model for in vitro study. Moreover, the biofilm formation
on the biocomposite surface was studied using confocal laser scanning
microscopy (CLSM).
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Affiliation(s)
- Sara Targonska
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
| | - Justyna Rewak-Soroczynska
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
| | - Agata Piecuch
- Institute
of Genetics and Microbiology, University
of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland
| | - Emil Paluch
- Department
of Microbiology, Faculty of Medicine, Wroclaw
Medical University, Tytusa Chalubinskiego 4, 50-376 Wroclaw, Poland
| | - Damian Szymanski
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
| | - Rafal J. Wiglusz
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wroclaw, Poland
- . Phone: +48(071)3954159. Fax: +48(071)3441029
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Rare-earth (Gd 3+,Yb 3+/Tm 3+, Eu 3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging. Sci Rep 2019; 9:16305. [PMID: 31705047 PMCID: PMC6841688 DOI: 10.1038/s41598-019-52885-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 10/23/2019] [Indexed: 11/09/2022] Open
Abstract
Taking advantage of the flexibility of the apatite structure, nano- and micro-particles of hydroxyapatite (HAp) were doped with different combinations of rare earth ions (RE3+ = Gd, Eu, Yb, Tm) to achieve a synergy among their magnetic and optical properties and to enable their application in preventive medicine, particularly diagnostics based on multimodal imaging. All powders were synthesized through hydrothermal processing at T ≤ 200 °C. An X-ray powder diffraction analysis showed that all powders crystallized in P63/m space group of the hexagonal crystal structure. The refined unit-cell parameters reflected a decrease in the unit cell volume as a result of the partial substitution of Ca2+ with smaller RE3+ ions at both cation positions. The FTIR analysis additionally suggested that a synergy may exist solely in the triply doped system, where the lattice symmetry and vibration modes become more coherent than in the singly or doubly doped systems. HAp:RE3+ optical characterization revealed a change in the energy band gap and the appearance of a weak blue luminescence (λex = 370 nm) due to an increased concentration of defects. The "up"- and the "down"-conversion spectra of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders showed characteristic transitions of Tm3+ and Eu3+, respectively. Furthermore, in contrast to diamagnetic HAp, all HAp:RE3+ powders exhibited paramagnetic behavior. Cell viability tests of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders in human dental pulp stem cell cultures indicated their good biocompatibility.
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Structural modification of nanohydroxyapatite Ca 10(PO 4) 6(OH) 2 related to Eu 3+ and Sr 2+ ions doping and its spectroscopic and antimicrobial properties. J Inorg Biochem 2019; 203:110884. [PMID: 31683129 DOI: 10.1016/j.jinorgbio.2019.110884] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 10/04/2019] [Accepted: 10/06/2019] [Indexed: 12/15/2022]
Abstract
The Eu3+ and Sr2+ ions co-doped hydroxyapatite nanopowders (Ca10(PO4)6(OH)2) were synthesized via a precipitation method and post heat-treated at 500 °C. The concentration of Eu3+ ions was established in the range of 0.5-5 mol% to investigate the site occupancy preference. The concentration of Sr2+ ions was set at 5 mol%. The structural and morphological properties of the obtained materials were studied by an X-ray powder diffraction, a transmission electron microscopy techniques and infrared spectroscopy. As synthesized nanoparticles were in the range of 11-17 nm and annealed particles were in the range of 20-26 nm. The luminescence properties in dependence of the dopant concentration and applied temperature were investigated. The 5D0 → 7F0 transition shown the abnormally strong intensity for annealed materials connected with the increase of covalency character of Eu3+-O2- bond, which arise as an effect of charge compensation mechanism. The Eu3+ ions occupied three possible crystallographic sites in these materials revealed in emission spectra: one Ca(1) site with C3 symmetry and two Ca(2) sites with Cs symmetry arranged as cis and trans symmetry. The antibacterial properties of Eu3+ and Sr2+ ions doped and co-doped hydroxyapatite nanopowders were also determined against Gram-negative pathogens such as Pseudomonas aeruginosa, Klebsiella pneumoniae and Escherichia coli. Obtained results suggest that both europium and strontium ions may implement antibacterial properties for hydroxyapatites. In the most cases, better antibacterial effect we noticed for dopants at 5 mol% ratio. However, the effect is strongly species- and strain-dependent feature.
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The Comprehensive Approach to Preparation and Investigation of the Eu 3+ Doped Hydroxyapatite/poly(L-lactide) Nanocomposites: Promising Materials for Theranostics Application. NANOMATERIALS 2019; 9:nano9081146. [PMID: 31405106 PMCID: PMC6724068 DOI: 10.3390/nano9081146] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/05/2019] [Accepted: 08/06/2019] [Indexed: 12/13/2022]
Abstract
In response to the need for new materials for theranostics application, the structural and spectroscopic properties of composites designed for medical applications, received in the melt mixing process, were evaluated. A composite based on medical grade poly(L-lactide) (PLLA) and calcium hydroxyapatite (HAp) doped with Eu3+ ions was obtained by using a twin screw extruder. Pure calcium Hap, as well as the one doped with Eu3+ ions, was prepared using the precipitation method and then used as a filler. XRPD (X-ray Powder Diffraction) and IR (Infrared) spectroscopy were applied to investigate the structural properties of the obtained materials. DSC (Differential Scanning Calorimetry) was used to assess the Eu3+ ion content on phase transitions in PLLA. The tensile properties were also investigated. The excitation, emission spectra as well as decay time were measured to determine the spectroscopic properties. The simplified Judd–Ofelt (J-O) theory was applied and a detailed analysis in connection with the observed structural and spectroscopic measurements was made and described.
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Xu H, Liu R, Zhang S, Deng M, Han K, Xu B, Ouyang C, Zhong S. Scandium Molybdate Microstructures with Tunable Phase and Morphology: Microwave Synthesis, Theoretical Calculations, and Photoluminescence Properties. Inorg Chem 2019; 58:2491-2500. [PMID: 30629430 DOI: 10.1021/acs.inorgchem.8b03056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper, scandium molybdate microstructures have been prepared from solution via a microwave heating method. By controlling the experimental parameters such as molar ratio of reagent and reaction time, scandium molybdates with tunable phase and diverse morphologies including snowflakes, microflowers, microsheets, and branched spindles were obtained. The density of states and surface energies of Sc2Mo3O12 were primarily studied from first-principles calculations. An indirect band gap of 3.56 eV was observed for crystalline Sc2Mo3O12, and the surface energies of various facets were determined to be 0.27-0.91 J/m2. The influence of n(Sc3+): n(Mo7O246-) (short for Sc/Mo) molar ratio was systematically investigated and well-characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and UV-vis absorption spectroscopy (UV-vis). Results indicate that the Sc/Mo molar ratio has a great effect on the phase and morphology. Diffuse reflection spectra (DRS) revealed the Egap can be readily tuned from 3.69 to 4.16 eV, which is in accordance with the theoretical result. The photoluminescence (PL) properties of Eu3+-doped Sc2Mo3O12 were discussed. This facile synthesis strategy could be extended to the synthesis of other molybdates.
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Huang L, Luo W, Liu M, Tian J, Huang Q, Huang H, Hui J, Wen Y, Zhang X, Wei Y. Facile preparation of Eu3+ and F− co-doped luminescent hydroxyapatite polymer composites via the photo-RAFT polymerization. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.12.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zawisza K, Strzep A, Wiglusz RJ. Influence of annealing temperature on the spectroscopic properties of hydroxyapatite analogues doped with Eu3+. NEW J CHEM 2017. [DOI: 10.1039/c7nj01380a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanosized calcium and strontium hydroxyapatites doped with 2 mol% Eu3+ ions were obtained by using a microwave-assisted hydrothermal method.
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Affiliation(s)
- Katarzyna Zawisza
- Institute of Low Temperature and Structure Research
- PAS
- PL-50-422 Wroclaw
- Poland
| | - Adam Strzep
- Institute of Low Temperature and Structure Research
- PAS
- PL-50-422 Wroclaw
- Poland
| | - Rafal J. Wiglusz
- Institute of Low Temperature and Structure Research
- PAS
- PL-50-422 Wroclaw
- Poland
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Zawisza K, Sobierajska P, Renaudin G, Nedelec JM, Wiglusz RJ. Effects of crystalline growth on structural and luminescence properties of Ca(10−3x)Eu2x(PO4)6F2 nanoparticles fabricated by using a microwave driven hydrothermal process. CrystEngComm 2017. [DOI: 10.1039/c7ce01454f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural and luminescence properties of Eu3+ doped nanofluorapatites obtained by hydrothermal method were investigated.
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Affiliation(s)
- Katarzyna Zawisza
- Institute of Low Temperature and Structure Research
- 50-422 Wroclaw
- Poland
| | | | - Guillaume Renaudin
- Université Clermont Auvergne
- CNRS
- SIGMA Clermont
- ICCF
- F-63000 Clermont-Ferrand
| | - Jean-Marie Nedelec
- Université Clermont Auvergne
- CNRS
- SIGMA Clermont
- ICCF
- F-63000 Clermont-Ferrand
| | - Rafal J. Wiglusz
- Institute of Low Temperature and Structure Research
- 50-422 Wroclaw
- Poland
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