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Tu H, Pan L, Qi H, Zhang S, Li F, Sun C, Wang X, Cui T. Ultrafast dynamics under high-pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:253002. [PMID: 36898154 DOI: 10.1088/1361-648x/acc376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 03/10/2023] [Indexed: 06/18/2023]
Abstract
High-pressure is a mechanical method to regulate the structure and internal interaction of materials. Therefore, observation of properties' change can be realized in a relatively pure environment. Furthermore, high-pressure affects the delocalization of wavefunction among materials' atoms and thus their dynamics process. Dynamics results are essential data for understanding the physical and chemical characteristics, which is valuable for materials application and development. Ultrafast spectroscopy is a powerful tool to investigate dynamics process and becoming a necessary characterization method for materials investigation. The combination of high-pressure with ultrafast spectroscopy in the nanocosecond∼femtosecond scale enables us to investigate the influence of the enhanced interaction between particles on the physical and chemical properties of materials, such as energy transfer, charge transfer, Auger recombination, etc. Base on this point of view, this review summarizes recent progress in the ultrafast dynamics under high-pressure for various materials, in which new phenomena and new mechanisms are observed. In this review, we describe in detail the principles ofin situhigh pressure ultrafast dynamics probing technology and its field of application. On this basis, the progress of the study of dynamic processes under high-pressure in different material systems is summarized. An outlook onin situhigh-pressure ultrafast dynamics research is also provided.
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Affiliation(s)
- Hongyu Tu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Lingyun Pan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Hongjian Qi
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Shuhao Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Fangfei Li
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Chenglin Sun
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Xin Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Tian Cui
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
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Singh K, Rajendran M, Devi R, Vaidyanathan S. Narrow-Band Red-Emitting Phosphors with High Color Purity, Trifling Thermal and Concentration Quenching for Hybrid White LEDs and Li 3Y 3BaSr(MoO 4) 8:Sm 3+, Eu 3+-Based Deep-Red LEDs for Plant Growth Applications. Inorg Chem 2022; 61:2768-2782. [PMID: 35099955 DOI: 10.1021/acs.inorgchem.1c02836] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trivalent europium-based monochromatic red light-emitting phosphors are an essential component to realize high-performance smart lighting devices; however, the concentration and thermal quenching restrict their usage. Here, we report a series of efficient Eu3+-substituted Li3Y3BaSr(MoO4)8 red-emitting phosphors based on a stratified scheelite structure with negligible concentration and thermal quenching. All of the host and phosphor compositions crystallize in monoclinic crystal structure (space group C2/c). All of the phosphor compositions produce narrow-band red emission (FWHM ∼6 nm), which is highly apparent to the human eyes, and lead to exceptional chromatic saturation of the red spectral window. Concurrently, detailed investigations were carried out to comprehend the concentration and thermal quenching mechanism. Absolute quantum yields as high as 88.5% were obtained for Li3Y0.3Eu2.7BaSr(MoO4)8 phosphor with virtuous thermal stability (at 400 K, retaining 87% of its emission intensity). The light-emitting diodes were constructed by coupling Li3BaSrY0.3Eu2.7(MoO4)8 red phosphor with a near-UV LED chip (395 nm) operated at 20 mA forward bias, and the hybrid white LED (an organic yellow dye + red Li3Y3BaSr(MoO4)8:Eu3+ phosphor integrated with an NUV LED chip) showed a low CCT (6645 K), high CRI (83) values, and CIE values of x = 0.303; y = 0.368, which indicated that the synthesized phosphors can be a suitable red component for white LEDs. In addition, we have systematically investigated the Sm3+ and Sm3+, Eu3+ activation in Li3Y3BaSr(MoO4)8 to display the latent use of the system in plant growth applications and establish that the phosphor exhibits orange red emission with an intense deep-red emission (645 nm (4G5/2 → 6H9/2)). The phytochrome (Pr) absorption spectrum well matched the fabricated deep-red LED (by integrating a NUV LED + Li3Y3BaSr(MoO4)8:Sm3+ and Eu3+ phosphor) spectral lines.
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Affiliation(s)
- Kasturi Singh
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Marikumar Rajendran
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Rachna Devi
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Sivakumar Vaidyanathan
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
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Transparent Glasses and Glass-Ceramics in the Ternary System TeO 2-Nb 2O 5-PbF 2. MATERIALS 2021; 14:ma14020317. [PMID: 33435448 PMCID: PMC7827021 DOI: 10.3390/ma14020317] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/28/2020] [Accepted: 01/04/2021] [Indexed: 11/16/2022]
Abstract
Transparent fluorotellurite glasses were prepared by melt-quenching in the ternary system TeO2-Nb2O5-PbF2. The synthesis conditions were adjusted to minimize fluorine loss monitored as HF release. It was found that 10 mol% of Nb2O5 is the optimum content for PbF2 incorporation up to 35 mol% in the tellurite matrix without loss of glass forming ability. Such glass compositions exhibit a wide optical window from 380 nm to about 6 μm. Crystallization properties were carefully investigated by thermal analysis and compositions with higher PbF2 contents exhibit preferential precipitation of lead oxyfluoride Pb2OF2 at lower temperatures. The lead oxyfluoride crystallization mechanism is also governed by a volume nucleation, barely reported in tellurite glasses. Eu3+ doping of these glass compositions also promotes a more efficient nucleation step under suitable heat-treatments, resulting in transparent Eu3+-doped glass-ceramics whereas undoped glass-ceramics are translucent. Finally, Eu3+ spectroscopy pointed out a progressive, more symmetric surrounding around the rare earth ions with increasing PbF2 contents as well as higher quantum efficiencies. These new fluorotellurite glass compositions are promising as luminescent hosts working in the middle infrared.
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Marasanov DV, Mironov LY, Sgibnev YM, Kolesnikov IE, Nikonorov NV. Luminescence and energy transfer mechanisms in photo-thermo-refractive glasses co-doped with silver molecular clusters and Eu 3. Phys Chem Chem Phys 2020; 22:23342-23350. [PMID: 33043919 DOI: 10.1039/d0cp02786c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+-Ag+ ion exchange technique followed by heat treatment. Comprehensive study of cluster emission reveals the presence of spectrally separated fluorescence and phosphorescence with nanosecond and microsecond lifetime. Co-doping of glasses with Eu3+ was shown to results in quenching of cluster luminescence caused by energy transfer. The monitoring of silver cluster luminescence quantum yield and lifetime in the presence of Eu3+ indicates the presence of two different mechanisms of energy transfer. The first one affects the decay kinetics of cluster fluorescence and manifests at long distances, while the second one leads to static quenching of cluster emission at shorter distances and becomes prominent at higher doping Eu3+ concentration.
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Ghiasi B, Sefidbakht Y, Mozaffari-Jovin S, Gharehcheloo B, Mehrarya M, Khodadadi A, Rezaei M, Ranaei Siadat SO, Uskoković V. Hydroxyapatite as a biomaterial - a gift that keeps on giving. Drug Dev Ind Pharm 2020; 46:1035-1062. [PMID: 32476496 DOI: 10.1080/03639045.2020.1776321] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthetic analogue to biogenic apatite, hydroxyapatite (HA) has a number of physicochemical properties that make it an attractive candidate for diagnosis, treatment of disease and augmentation of biological tissues. Here we describe some of the recent studies on HA, which may provide bases for a number of new medical applications. The content of this review is divided to different medical application modes utilizing HA, including tissue engineering, medical implants, controlled drug delivery, gene therapies, cancer therapies and bioimaging. A number of advantages of HA over other biomaterials emerge from this discourse, including (i) biocompatibility, (ii) bioactivity, (iii) relatively simple synthesis protocols for the fabrication of nanoparticles with specific sizes and shapes, (iv) smart response to environmental stimuli, (v) facile functionalization and surface modification through noncovalent interactions, and (vi) the capacity for being simultaneously loaded with a wide range of therapeutic agents and switched to bioimaging modalities for uses in theranostics. A special section is dedicated to analysis of the safety of particulate HA as a component of parenterally administrable medications. It is concluded that despite the fact that many benefits come with the usage of HA, its deficiencies and potential side effects must be addressed before the translation to the clinical domain is pursued. Although HA has been known in the biomaterials world as the exemplar of safety, this safety proves to be the function of size, morphology, surface ligands and other structural and compositional parameters defining the particles. For this reason, each HA, especially when it comes in a novel structural form, must be treated anew from the safety research angle before being allowed to enter the clinical stage.
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Affiliation(s)
- Behrad Ghiasi
- Protein Research Center, Shahid Beheshti University, Tehran, Iran
| | - Yahya Sefidbakht
- Protein Research Center, Shahid Beheshti University, Tehran, Iran.,Nanobiotechnology Laboratory, The Faculty of New Technologies Engineering (NTE), Shahid Beheshti University, Tehran, Iran
| | - Sina Mozaffari-Jovin
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | | | - Arash Khodadadi
- Department of Pharmaceutics, Faculty of Pharmacy, Kerman University of Medical Science, Kerman, Iran
| | - Maryam Rezaei
- Institute of Biochemistry and Biophysics (IBB), Tehran University, Tehran, Iran
| | - Seyed Omid Ranaei Siadat
- Protein Research Center, Shahid Beheshti University, Tehran, Iran.,Nanobiotechnology Laboratory, The Faculty of New Technologies Engineering (NTE), Shahid Beheshti University, Tehran, Iran
| | - Vuk Uskoković
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA, USA
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Burek K, Eidner S, Kuke S, Kumke MU. Intramolecular deactivation processes of electronically excited Lanthanide(III) complexes with organic acids of low molecular weight. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:36-49. [PMID: 28982067 DOI: 10.1016/j.saa.2017.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 08/16/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
The luminescence of Lanthanide(III) complexes with different model ligands was studied under direct as well as sensitized excitation conditions. The research was performed in the context of studies dealing with deep-underground storages for high-level nuclear waste. Here, Lanthanide(III) ions served as natural analogues for Actinide(III) ions and the low-molecular weight organic ligands are present in clay minerals and furthermore, they were employed as proxies for building blocks of humic substances, which are important complexing molecules in the natural environment, e.g., in the far field of a repository site. Time-resolved luminescence spectroscopy was applied for a detailed characterization of Eu(III), Tb(III), Sm(III) and Dy(III) complexes in aqueous solutions. Based on the observed luminescence the ligands were tentatively divided into two groups (A, B). The luminescence of Lanthanide(III) complexes of group A was mainly influenced by an energy transfer to OH-vibrations. Lanthanide(III) complexes of group B showed ligand-related luminescence quenching, which was further investigated. To gain more information on the underlying quenching processes of group A and B ligands, measurements at different temperatures (77K≤T≤353K) were performed and activation energies were determined based on an Arrhenius analysis. Moreover, the influence of the ionic strength between 0M≤I≤4M on the Lanthanide(III) luminescence was monitored for different complexes, in order to evaluate the influence of specific conditions encountered in host rocks foreseen as potential repository sites.
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Affiliation(s)
- Katja Burek
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany.
| | - Sascha Eidner
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany
| | - Stefanie Kuke
- KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163 Berlin, Germany
| | - Michael U Kumke
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany.
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Muñoz-Santiuste JE, Lavín V, Rodríguez-Mendoza UR, Ferrer-Roca C, Errandonea D, Martínez-García D, Rodríguez-Hernández P, Muñoz A, Bettinelli M. Experimental and theoretical study on the optical properties of LaVO4 crystals under pressure. Phys Chem Chem Phys 2018; 20:27314-27328. [PMID: 30357167 DOI: 10.1039/c8cp04701d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report optical absorption and luminescence measurements in pure and trivalent neodymium (Nd3+) doped LaVO4 crystals up to 25 GPa. We also present the theoretical framework to accurately explain the observed experimental results.
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Affiliation(s)
- J. E. Muñoz-Santiuste
- Departamento de Física, and MALTA Consolider Team
- Escuela Politécnica Superior
- Universidad Carlos III de Madrid
- Avenida de la Universidad 30
- E-28913 Leganés
| | - V. Lavín
- Departamento de Física
- MALTA Consolider Team
- IMN and IUdEA
- Universidad de La Laguna. Apdo. 456
- E-38200 San Cristóbal de La Laguna
| | - U. R. Rodríguez-Mendoza
- Departamento de Física
- MALTA Consolider Team
- IMN and IUdEA
- Universidad de La Laguna. Apdo. 456
- E-38200 San Cristóbal de La Laguna
| | - Ch. Ferrer-Roca
- Departamento de Física Aplicada-ICMUV
- MALTA Consolider Team
- Universidad de Valencia
- Edificio de Investigación
- C/Dr Moliner 50
| | - D. Errandonea
- Departamento de Física Aplicada-ICMUV
- MALTA Consolider Team
- Universidad de Valencia
- Edificio de Investigación
- C/Dr Moliner 50
| | - D. Martínez-García
- Departamento de Física Aplicada-ICMUV
- MALTA Consolider Team
- Universidad de Valencia
- Edificio de Investigación
- C/Dr Moliner 50
| | - P. Rodríguez-Hernández
- Departamento de Física
- MALTA Consolider Team, and Instituto de Nanomateriales y Nanotecnología
- Universidad de La Laguna. Apdo. 456
- E-38200 San Cristóbal de La Laguna
- Spain
| | - A. Muñoz
- Departamento de Física
- MALTA Consolider Team, and Instituto de Nanomateriales y Nanotecnología
- Universidad de La Laguna. Apdo. 456
- E-38200 San Cristóbal de La Laguna
- Spain
| | - M. Bettinelli
- Laboratori Materiali Luminescenti, DB, and INSTM
- Università di Verona
- 37134 Verona
- Italy
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8
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Razak NA, Hashim S, Mhareb MHA, Alajerami YSM, Azizan SA, Tamchek N. Impact of Eu3+ Ions on Physical and Optical Properties of Li2O-Na2O-B2O3 Glass. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1511226] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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9
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Eid AM, Farag MA, Abd-ullah Abd El-Rahman K, El-Okr MM. Ultrasonic study on complex glass system doped with erbium oxide. JOURNAL OF MATERIALS RESEARCH 2016; 31:495-505. [DOI: 10.1557/jmr.2016.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Abstract
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10
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Ruiz-Fuertes J, Gomis O, León-Luis SF, Schrodt N, Manjón FJ, Ray S, Santamaría-Pérez D, Sans JA, Ortiz HM, Errandonea D, Ferrer-Roca C, Segura A, Martínez-García D, Lavín V, Rodríguez-Mendoza UR, Muñoz A. Pressure-induced amorphization of YVO₄:Eu³⁺ nanoboxes. NANOTECHNOLOGY 2016; 27:025701. [PMID: 26618997 DOI: 10.1088/0957-4484/27/2/025701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A structural transformation from the zircon-type structure to an amorphous phase has been found in YVO4:Eu(3+) nanoboxes at high pressures above 12.7 GPa by means of x-ray diffraction measurements. However, the pair distribution function of the high-pressure phase shows that the local structure of the amorphous phase is similar to the scheelite-type YVO4. These results are confirmed both by Raman spectroscopy and Eu(3+) photoluminescence which detect the phase transition to a scheelite-type structure at 10.1 and 9.1 GPa, respectively. The irreversibility of the phase transition is observed with the three techniques after a maximum pressure in the upstroke of around 20 GPa. The existence of two (5)D0-->(7)F0 photoluminescence peaks confirms the existence of two local environments for Eu(3+), at least for the low-pressure phase. One environment is the expected for substituting Y(3+) and the other is likely a disordered environment possibly found at the surface of the nanoboxes.
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Affiliation(s)
- J Ruiz-Fuertes
- Institut für Geowissenschaften, Goethe-Universität, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany
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Pisarski WA, Pisarska J, Dorosz D, Dorosz J. Rare earths in lead-free oxyfluoride germanate glasses. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:587-591. [PMID: 25088539 DOI: 10.1016/j.saa.2014.07.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 07/07/2014] [Accepted: 07/15/2014] [Indexed: 06/03/2023]
Abstract
Spectroscopic properties of rare earths in lead-free oxyfluoride germanate glasses were studied. The absorption and luminescence spectra of Eu(3+), Pr(3+) and Er(3+) ions were examined as a function of BaF₂ concentration and several spectroscopic parameters for rare earths were determined. The ratio of integrated luminescence intensity of the (5)D₀→(7)F₂ transition to that of the (5)D₀→(7)F₁ transition of Eu(3+) decrease significantly with increasing BaF₂ content. The absorption (Er(3+)) and emission (Pr(3+)) 'hypersensitive transitions' of rare earths are shifted in direction to shorter wavelengths with increasing BaF₂ content in glass composition. Emission spectra and their decays corresponding to the main (4)I₁₃/₂→(4)I₁₅/₂ laser transition of Er(3+) were also analyzed. Quite long-lived NIR luminescence of Er(3+) is observed for lead-free glass samples with low BaF₂ concentration.
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Affiliation(s)
- Wojciech A Pisarski
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland.
| | - Joanna Pisarska
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland
| | - Dominik Dorosz
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland
| | - Jan Dorosz
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland
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Swapna K, Mahamuda S, Srinivasa Rao A, Shakya S, Sasikala T, Haranath D, Vijaya Prakash G. Optical studies of Sm³⁺ ions doped zinc alumino bismuth borate glasses. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:53-60. [PMID: 24530709 DOI: 10.1016/j.saa.2014.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 01/04/2014] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
Zinc Alumino Bismuth Borate (ZnAlBiB) glasses doped with different concentrations of samarium (Sm(3+)) ions were prepared by using melt quenching technique and characterized for their lasing potentialities in visible region by using the techniques such as optical absorption, emission and emission decay measurements. Radiative properties for various fluorescent levels of Sm(3+) ions were estimated from absorption spectral information using Judd-Ofelt (JO) analysis. The emission spectra and con-focal photoluminescence images obtained by 410 nm laser excitation demonstrates very distinct and intense orange-red emission for all the doped glasses. The suitable concentration of Sm(3+) ions in these glasses to act as an efficient lasing material has been discussed by measuring the emission cross-section and branching ratios for the emission transitions. The quantum efficiencies were also been estimated from emission decay measurements recorded for the (4)G5/2 level of Sm(3+) ions. From the measured emission cross-sections, branching ratios, strong photoluminescence features and CIE chromaticity coordinates, it was found that 1 mol% of Sm(3+) ions doped ZnAlBiB glasses are most suitable for the development of visible orange-red lasers.
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Affiliation(s)
- K Swapna
- Department of Physics, KL University, Green Fields, Guntur (Dt), Vaddeswaram 522 502, AP, India
| | - Sk Mahamuda
- Department of Physics, KL University, Green Fields, Guntur (Dt), Vaddeswaram 522 502, AP, India
| | - A Srinivasa Rao
- Department of Physics, KL University, Green Fields, Guntur (Dt), Vaddeswaram 522 502, AP, India; Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi 110 042, India.
| | - S Shakya
- Nano Photonics Laboratory, Department of Physics, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi 110 016, India
| | - T Sasikala
- Department of Physics, SV University, Tirupathi 517 502, AP, India
| | - D Haranath
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, Pusa, New Delhi 110 012, India
| | - G Vijaya Prakash
- Nano Photonics Laboratory, Department of Physics, Indian Institute of Technology-Delhi, Hauz Khas, New Delhi 110 016, India
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15
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Zulfiqar Ali Ahamed S, Madhukar Reddy C, Deva Prasad Raju B. Spectroscopic and laser properties of Sm³⁺ ions doped lithium fluoroborate glasses for efficient visible lasers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:246-254. [PMID: 23261619 DOI: 10.1016/j.saa.2012.11.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 11/02/2012] [Accepted: 11/06/2012] [Indexed: 06/01/2023]
Abstract
The Sm(3+)-doped lead barium zinc lithium fluoroborate (LBZLFB) glasses of composition 20PbO + 5BaO + 5ZnO + 10LiF + (60-x) B(2)O(3) + xSm(2)O(3), (where x=0.1, 0.5, 1.0, 1.5 and 2.0 mol%) have been prepared by conventional melt quenching technique and their structural and spectroscopic behavior were studied and reported. The amorphous nature of these glass samples was confirmed with XRD studies. The FT-IR and FT-Raman spectra reveal that, the glasses contain BO(3), BO(4), non-bridging oxygen and strong OH bonds. The bonding parameters and the oscillator strengths were determined from the absorption spectra. These parameters have been used to obtain the Judd-Ofelt intensity parameters. Using these intensity parameters various radiative and laser properties were predicted. The values of J-O intensity parameters suggested an increase in the degree of symmetry of the local ligand field at Sm(3+) sites. The decay rates for the (4)G(5/2) level of Sm(3+) ions have been measured and are found to be single exponential at lower concentrations (<1.0 mol%) and turn into non-exponential at higher concentrations (≥1.0 mol%), due to energy transfer through cross-relaxation. From the emission characteristic parameters of (4)G(5/2) level, it is concluded that the LBZLFB glasses could be useful for photonic devices like visible lasers, fluorescent display devices and optical amplifiers, operated in the visible region.
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16
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Wang Y, Yang B, Townsend PD. Structural changes and relaxations monitored by luminescence. LUMINESCENCE 2012; 28:253-8. [PMID: 22511618 DOI: 10.1002/bio.2362] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 02/07/2012] [Accepted: 02/09/2012] [Indexed: 11/09/2022]
Abstract
Luminescence data have often been used to study imperfections and to characterize lattice distortions because the signals are sensitive to changes of structure and composition. Previous studies have included intentionally added probe ions such as rare earth ions to sense distortions in local crystal fields caused by modified structural environments. An under-exploited extension of this approach was to use luminescence to monitor crystalline phase changes. A current overview of this new and powerful technique shows that continuous scanning of the sample temperatures immediately offered at least three types of signatures for phase transitions. Because of high sensitivity, luminescence signals were equally responsive to structural changes from inclusions and nanoparticles. These coupled to the host material via long-range interactions and modified the host signals. Two frequently observed examples that are normally overlooked are from nanoparticle inclusions of water and CO2. Examples also indicated that phase transitions were detected in more diverse materials such as superconductors and fullerenes. Finally, luminescence studies have shown that in some crystalline examples, high dose ion implantation of surface layers could induce relaxations and/or structural changes of the entire underlying bulk material. This was an unexpected result and therefore such a possibility has not previously been explored. However, the implications for ion implication are significant and could be far more general than the examples mentioned here.
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Affiliation(s)
- Y Wang
- School of Science, China University of Geosciences, Beijing, 100083, China.
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Holliday K, Chagneau A, Schmidt M, Claret F, Schäfer T, Stumpf T. Discriminating factors affecting incorporation: comparison of the fate of Eu3+–Cm3+ in the Sr carbonate–sulfate system. Dalton Trans 2012; 41:3642-7. [DOI: 10.1039/c2dt12425d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Marmodée B, Jahn K, Ariese F, Gooijer C, Kumke MU. Direct Spectroscopic Evidence of 8- and 9-fold Coordinated Europium(III) Species in H2O and D2O. J Phys Chem A 2010; 114:13050-4. [DOI: 10.1021/jp1094036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bettina Marmodée
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Karolina Jahn
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Michael U. Kumke
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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Marmodée B, de Klerk JS, Ariese F, Gooijer C, Kumke MU. High-resolution steady-state and time-resolved luminescence studies on the complexes of Eu(III) with aromatic or aliphatic carboxylic acids. Anal Chim Acta 2009; 652:285-94. [DOI: 10.1016/j.aca.2009.06.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 05/29/2009] [Accepted: 06/03/2009] [Indexed: 10/20/2022]
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20
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Muñoz-Santiuste JE, Rodríguez-Mendoza UR, González-Platas J, Lavín V. Structural study of the Eu3+ environments in fluorozirconate glasses: Role of the temperature-induced and the pressure-induced phase transition processes in the development of a rare earth’s local structure model. J Chem Phys 2009; 130:154501. [DOI: 10.1063/1.3100770] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Schmidt M, Stumpf T, Walther C, Geckeis H, Fanghänel T. Incorporation versus adsorption: substitution of Ca2+ by Eu3+ and Cm3+ in aragonite and gypsum. Dalton Trans 2009:6645-50. [DOI: 10.1039/b822656c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Finck N, Stumpf T, Walther C, Bosbach D. TRLFS characterization of Eu(III)-doped synthetic organo-hectorite. JOURNAL OF CONTAMINANT HYDROLOGY 2008; 102:253-262. [PMID: 18845359 DOI: 10.1016/j.jconhyd.2008.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 07/29/2008] [Accepted: 08/15/2008] [Indexed: 05/26/2023]
Abstract
Europium(III) was coprecipitated with the clay mineral hectorite, a magnesian smectite, following a multi-step synthesis procedure. Different Eu(III) species associated with the proceeding synthetic hectorite were characterized by selectively exciting the 5D0-->7F0 transition at low temperature (T < 20 K). Fluorescence decay times indicated that Eu(III) ions may be incorporated in the octahedral layer of the brucite precursor as well as in the octahedral sheet of the clay mineral. The excitation spectra indicated that the substitution of the divalent Mg by the trivalent Eu induced local structural deformation. This investigation implements the molecular-level understanding of the f element structural incorporation into the octahedral layer of sheet silicates by coprecipitation with clay minerals from salt solutions at 100 degrees C.
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Affiliation(s)
- Nicolas Finck
- Institut für Nukleare Entsorgung (INE), Forschungszentrum Karlsruhe, PO Box 3640, D-76021 Karlsruhe, Germany.
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Jia G, Law GL, Wong KL, Tanner PA, Wong WT. Synthesis, Crystal Structures, and Luminescence of Organic-Lanthanide Complexes with Nicotinate and Isonicotinate Ligands. Inorg Chem 2008; 47:9431-8. [DOI: 10.1021/ic8010103] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guohua Jia
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., P.R. China, and Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong S.A.R., P.R. China
| | - Ga-Lai Law
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., P.R. China, and Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong S.A.R., P.R. China
| | - Ka-Leung Wong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., P.R. China, and Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong S.A.R., P.R. China
| | - Peter A. Tanner
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., P.R. China, and Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong S.A.R., P.R. China
| | - Wing-Tak Wong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., P.R. China, and Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong S.A.R., P.R. China
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Schmidt M, Stumpf T, Marques Fernandes M, Walther C, Fanghänel T. Charge compensation in solid solutions. Angew Chem Int Ed Engl 2008; 47:5846-50. [PMID: 18600812 DOI: 10.1002/anie.200705827] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Moritz Schmidt
- Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany
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Schmidt M, Stumpf T, Marques Fernandes M, Walther C, Fanghänel T. Ladungsausgleich in festen Lösungen. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Site-selective time-resolved laser fluorescence spectroscopy of Eu3+ in calcite. J Colloid Interface Sci 2008; 321:323-31. [DOI: 10.1016/j.jcis.2008.01.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Revised: 01/08/2008] [Accepted: 01/13/2008] [Indexed: 11/22/2022]
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27
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Barja BC, Aramendía PF. Luminescent Eu(iii) hybrid materials for sensor applications. Photochem Photobiol Sci 2008; 7:1391-9. [DOI: 10.1039/b806071a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Surendra Babu S, Babu P, Jayasankar CK, Tröster T, Sievers W, Wortmann G. Photoluminescence from the (5)D(0) level of Eu(3+) ions in a phosphate glass under pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2006; 18:1927-1938. [PMID: 21697566 DOI: 10.1088/0953-8984/18/6/009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The pressure dependence of the luminescence from [Formula: see text] transitions of Eu(3+) ions in 58.5P(2)O(5)-9Al(2)O(3)-14.5BaO-17K(2)O-1Eu(2)O(3) glass has been investigated up to 38.3 GPa at room temperature. The relative luminescence intensity ratio of [Formula: see text] to [Formula: see text] transitions of the Eu(3+) ions is found to decrease with increasing pressure, indicating a lowering of the asymmetry around the Eu(3+) ions with pressure. The [Formula: see text] transitions exhibit pressure-induced red shifts of different magnitude, which suggests a decrease in Slater parameters (F(k)) and in the spin-orbit coupling parameters (ζ) for the Eu(3+) ions. Stark components of the (7)F(1) level have been used to evaluate the crystal-field (CF) parameters B(20) and B(22), which are in turn used to estimate the CF strength experienced by the Eu(3+) ions in the glass. The observed increase in the CF strength parameter is found to have an almost cubic dependence on pressure. Luminescence decay curves for the [Formula: see text] transition are found to be single exponential over the entire pressure range studied. The lifetime did not change under pressure up to 5 GPa, although a significant change in the CF strength is noticed in this pressure range. The reduction of lifetime observed at pressures above 5 GPa could be partially due to an increase of pressure-induced defect centres. Such a process can then explain the hysteresis observed in the variation of lifetime and crystal-field strength on the release of pressure.
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Affiliation(s)
- S Surendra Babu
- Department of Physics, Sri Venkateswara University, Tirupati-517 502, India
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Venkatramu V, Babu P, Jayasankar CK. Fluorescence properties of Eu3+ ions doped borate and fluoroborate glasses containing lithium, zinc and lead. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 63:276-81. [PMID: 15979397 DOI: 10.1016/j.saa.2005.05.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Accepted: 05/10/2005] [Indexed: 05/03/2023]
Abstract
The influence of glass composition on the fluorescence properties of Eu3+ ions doped borate and fluoroborate glasses modified with Li+, Zn2+ and Pb2+ cations have been investigated. The magnitude of splittings of 7F1 levels are analyzed using crystal-field (CF) analysis. The relative intensities of 5D0 --> 7F2 to 5D0 --> 7F1 transitions, crystal-field strength parameters and decay times of the 5D0 level have been determined and are found to be lower for Pb based glasses than those of Zn/Li based glasses. The lifetimes of 5D0 level are found to increase when borate glasses are modified with pure fluorides than with oxides and oxyfluorides. The fluorescence decay of 5D0 level fits perfect single exponential in the Eu3+:glass systems studied which indicates the absence of energy transfer between Eu3+ ions in these glasses.
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Affiliation(s)
- V Venkatramu
- Department of Physics, Sri Venkateswara University, Tirupati 517502, India
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El-Himri A, Pérez-Coll D, Núñez P, Martín IR, Lavín V, Rodríguez VD. Preparation and optical spectroscopy of Eu3+-doped GaN luminescent semiconductor from freeze-dried precursors. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2004.08.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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