Article
Chemistry, Inorganic & Nuclear
Yuhong Zhang, Pengcheng Wang, Haiyan Wang, Xingke Zheng, Yibin Guo, Nan Zhang, Hang Liu
Summary: Phosphors with RE ions are widely used for optical temperature measurements and have potential applications in the biological field. In this study, Gd2O3:x%Nd3+/Yb3+ samples were successfully synthesized and characterized. The UC and DS emissions under 980 nm CW laser excitation were studied. The temperature sensing performances of different levels of Gd2O3:Nd3+/Yb3+ phosphors were investigated using FIR technology. The results showed high relative sensitivity and durability of the phosphors in the biological window.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Evgenii V. Borisov, Evgenii Yu Kolesnikov
Summary: Rapid progress in nanotechnology and biomedicine has led to a high demand for accurate and contactless thermal sensing in real time. To address this issue, dual-doped Gd2O3:Tb3+,Eu3+ nanopowders were suggested as ratiometric thermometers within a wide temperature range. The effects of calcination temperature on the structure, morphology, luminescence, and thermometric properties were studied. The results showed that the growth of calcination temperature enhanced the thermometric performances, with the best thermometer displaying a sensitivity of 5.04% K-1 at 473 K.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Guixian Li, Yu Xue, Qinan Mao, Lang Pei, Hong He, Meijiao Liu, Liang Chu, Jiasong Zhong
Summary: Luminescent thermometers provide a non-contact method of probing temperature with high sensitivity and response speed at the nanoscale. By co-doping the highly temperature-sensitive Mn4+ and less-sensitive Eu3+ (or Sm3+) activators into a Ca2GdSbO6 matrix, an effective thermometer is formed.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Arup K. Kunti, Nirmalendu Patra, Richard A. Harris, Shailendra K. Sharma, Dibyendu Bhattacharyya, Sambhu N. Jha, Hendrik C. Swart
Summary: This study investigated the impact of Eu3+ doping concentration on the structural and luminescence properties of Eu3+ doped CaZrO3 red phosphors. Rietveld refinement method confirmed the occupancy of Eu3+ ions and explored the local structure around Eu3+ ions. Luminescence investigation showed the brightest red emission at 3 mol% Eu3+ doping concentration and revealed the energy transfer mechanism.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Ceramics
Fengfeng Chi, Liangliang Pan, Bin Jiang, Zhangchao Ji, Jie Cheng, Bing Wang, Xiantao Wei, Shengli Liu
Summary: Tb3+ and Eu3+ doped La4GeO8 phosphors with multicolor emission were synthesized and their photoluminescence properties were investigated. The energy transfer from Tb3+ to Eu3+ in La4GeO8 is attributed to quadrupole-quadrupole interaction. The La4GeO8:0.07Tb3+,0.01Eu3+ phosphor exhibits good thermal stability with activation energies of 0.186 eV and 0.187 eV for Tb3+ and Eu3+ ions, respectively. By adjusting the content ratio of Eu3+ to Tb3+, the La4GeO8:Tb3+,Eu3+ phosphors can achieve multicolor luminescence and tunable chromaticity. These findings suggest that La4GeO8:Tb3+,Eu3+ phosphors are promising for solid-state lighting applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Victor H. Colin Calderon, Antonieta Garcia Murillo, Dulce Y. Medina Velazquez, Felipe de J. Carrillo Romo, Aristeo Garrido Hernandez, Manuela Diaz Cruz
Summary: This study investigated the influence of the organic ligand TTA on the luminescent properties of TTA/Gd2O3:Eu3+ hybrid systems by varying the TTA: Gd2O3:Eu3+ molar ratios. The results showed that the TTA/Gd2O3:Eu3+ hybrid systems exhibited stronger luminescence intensity compared to non-hybrid systems, attributed to an energy transfer from the thenoyltrifluoroacetone ligands to the Gd2O3:Eu3+ particles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Piyush Jha, Ayush Khare, Pranav Singh, V. K. Chandra
Summary: Undoped and Eu-doped Gd2Zr2O7 phosphors with different concentrations were prepared using the solid-state reaction method. The emission color of Gd2Zr2O7:Eu3+ phosphors can be tuned over a broad range by varying the Eu3+ concentration under 256 nm excitation wavelength. The synthesized phosphors were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) spectroscopy. The PL spectra showed the 5D0 -> 7FJ (J = 1, 2, and 3) transition of Eu3+ and described the afterglow properties of these phosphors, which may be suitable for white-LED (WLED) development.
Article
Chemistry, Multidisciplinary
Priti Singh, H. Mishra, Praveen C. C. Pandey, Shyam Bahadur Rai
Summary: Sm3+-doped and Sm3+/Eu3+ co-doped CaTiO3 phosphor samples were synthesized and characterized. The synthesized phosphor samples exhibited orange-red and deep red emissions, which are useful for LED applications. The decrease in the lifetime of Sm3+ ions was attributed to energy transfer to Eu3+ ions.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Optics
Pablo Serna-Gallen, Hector Beltran-Mir, Eloisa Cordoncillo
Summary: The study explores the synthesis and characteristics of Eu3+-doped KY3F10 materials, highlighting the importance of reaction conditions in determining the final product properties. The results show significant changes in photoluminescence spectra and lifetimes, indicating potential for applications in white light-emitting diodes.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Wenke Ruan, Renrong Zhang, Qi Zhong, Yan Fu, Zhiwei Yang, Mubiao Xie
Summary: A series of Ba3P4O13:xEu(2+/3+) phosphors were synthesized at a relatively low temperature in a CO reduction atmosphere, and their crystallization and optical properties were studied. The results show that the emission color of the phosphor can be adjusted by changing the Eu ion doping concentration, making it a potential white light-emitting material.
Article
Spectroscopy
Yanyan Li, Na Li, Pengfei Zhang, Zhiting Wei, Ziqi Wang, Lei Zhao, Wenbo Chen
Summary: A series of novel deep red-emitting Ca2Ga2GeO7 phosphors were successfully synthesized to explore diverse luminescence properties of Eu3+. The emission spectrum shows that the intensity of the peak at 704 nm is higher than that at 618 nm, leading to the deep-red emission of the phosphor with high color saturation. The coordination dodecahedron of EuO8 is responsible for the unusual emission of Eu3+.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Polina A. Ryabochkina, Anna Egorysheva, Svetlana Golodukhina, Svetlana A. Khrushchalina, Alina D. Taratynova, Ivan A. Yurlov
Summary: Novel phosphors were synthesized and doped with various rare earth ions in this study, showing different emission properties influenced by the host type and the rare earth ion coordination environment. The co-doping of Eu3+, Dy3+, and Tb3+ ions resulted in a color shift in the emission, demonstrating the potential for tunable luminescent materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Applied
Hao-Long Chen, Po-Hsueh Lin, Hung-Rung Shih, Yee-Shin Chang
Summary: The Dy3+ and Eu3+ co-doped Ba2LaNbO6 phosphor was prepared by a high-temperature solid-state reaction method. The effects of ion co-doping concentration on the crystal structures, surface morphologies, and photoluminescence properties of the phosphors were investigated. It was found that the emission wavelengths and CIE chromaticity coordinates of the phosphors changed with the concentration of Dy3+ ions, and the co-doping of Dy3+ and Eu3+ ions resulted in phosphors with characteristics closer to white light.
MODERN PHYSICS LETTERS B
(2022)
Article
Chemistry, Physical
Ruby Priya, Piyush Sharma, Dinesh Kumar, Smriti, O. P. Pandey
Summary: The study reported the easy synthesis of phase pure and crystalline Eu doped BaTiO3 phosphors via solid-state method. The synthesized samples showed potential applications in optoelectronic and display devices, with characteristics including excitation by near UV and visible blue light, emission intensity at 617 nm under 465 nm excitation, and bi-exponential decay curves. The results were characterized using XRD, FESEM, UV-Visible, and photoluminescence techniques, along with Rietveld refinement and Dexter and Blasse's theory.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Hanzhao Song, Wanying Wu, Zhifeng Xing, Xunsheng Zhou, Aihua Yao, Shanshan Hu, Ying Hong, Baolong Wang, Shuang Lu, Yinzhen Wang
Summary: In this study, Novel Te4+-doped CaYAlO4 phosphors were successfully synthesized via solid-state reaction and were found to emit deep-red light when excited by specific wavelengths. The optimal Te4+ doping concentration was identified as 2 mol%, and it was observed that the luminescent intensity of the phosphors could decrease with an increase in temperature.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
L. Marciniak, W. Piotrowski, M. Szalkowski, V. Kinzhybalo, M. Drozd, M. Dramicanin, A. Bednarkiewicz
Summary: A novel class of highly sensitive thermographic phosphors operating in room temperature range with sub-kelvin thermal resolution has been demonstrated. The luminescence properties of optically active europium ions in nanocrystalline host materials were found to be highly susceptible to phase transitions, providing insights into phase transition based luminescence nanothermometry.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
W. Piotrowski, M. Kuchowicz, M. Dramicanin, L. Marciniak
Summary: The substitution of Sr2+ by trivalent lanthanide ions in SrTiO3 nanocrystals enhances Ti3+ near-infrared emission, leading to the development of highly sensitive luminescent nanothermometers with exceptional repeatability in measurements.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Bojana Milicevic, Yingyuan Chen, Junhao Li, Miroslav D. Dramicanin, Jianbang Zhou, Mingmei Wu
Summary: This study demonstrates the preparation of Mn4+-activated K2TiF6 phosphor using an organic solvent-assisted co-precipitation strategy, where the particle size can be controlled by selecting organic solvents with different carbon chain lengths. The addition of n-butanol during synthesis was found to significantly increase the emission intensity of K2TiF6:Mn, leading to a much higher photoluminescence quantum efficiency compared to conventionally prepared phosphors. These findings not only provide a way to prepare targeted morphology K2TiF6:Mn phosphor with high quantum efficiency, but also offer a potential route for optimizing other Mn4+-activated fluoride phosphors for white light-emitting diodes.
DALTON TRANSACTIONS
(2022)
Article
Optics
B. Kahouadji, L. Guerbous, Dragana J. Jovanovic, Miroslav D. Dramicanin
Summary: The temperature-dependence of red emission from YPO4:0.1% Pr3+ nanopowders was investigated to compare the spectroscopic properties between nanosized and single crystal forms. The differences were observed in emission intensity, phonon-assisted non-radiative transitions, and multiphonon relaxation processes between 3P0 and 1D2 levels. Furthermore, the potential application of YPO4:0.1% Pr3+ in nano-thermometry in the temperature range of 10-300 K was explored.
JOURNAL OF LUMINESCENCE
(2022)
Article
Physics, Condensed Matter
Aleksandar Ciric, Zoran Ristic, Zeljka Antic, Miroslav D. Dramicanin
Summary: Two experimental practices in luminescence intensity ratio thermometry, based on SD and WS, were analyzed for their performances in the case of sharp emission overlapping with a broad one. A new method named AD is proposed as an alternative, which retains the simplicity of WS while matching the sensitivities of the SD method. Although temperature resolution is not improved, the AD method allows fit to the Boltzmann equation and extraction of physically relevant parameters.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Aleksandar Ciric, Lukasz Marciniak, Miroslav D. Dramicanin
Summary: Judd-Ofelt theory is fundamental in lanthanides' spectroscopy, and this study presents a technique for calculating Judd-Ofelt intensity parameters from excitation spectra, along with a user-friendly web application.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Aleksandar Ciric, Stevan Stojadinovic, Miroslav D. Dramicanin
Summary: 15 mu m thick Ti-Sapphire coatings were successfully synthesized using plasma electrolytic oxidation (PEO) method on pure aluminum substrates with the addition of TiO2 particles. The coatings exhibit typical Ti-Sapphire photoluminescence features and show potential as multifunctional barrier-level optical temperature sensor materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
K. Maciejewska, P. Szklarz, A. Bednarkiewicz, M. D. Dramicanin, L. Marciniak
Summary: This study demonstrated that temperature-driven irreversible structural phase transformations in Eu3+ activated LaPO4, La0.5Y0.5PO4, and YPO4 nanocrystals can be utilized for thermal history measurements in the temperature range of 200°C-1000°C. The changes in Eu3+ local surroundings due to temperature increase modified the intensity and emission spectra, and the intensity ratio of Eu3+ 5D0 -> 7F2 to 5D0 -> 7F1 emissions served as a highly-sensitive indicator of the highest temperature experienced by the nanocrystals. The proposed ratiometric readout strategy enhanced the accuracy of thermal history analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
A. V. Racu, Z. Ristic, A. Ciric, V. Dordevic, G. Buse, M. Poienar, M. J. Gutmann, O. Ivashko, M. Stef, D. Vizman, M. D. Dramicanin, M. Piasecki, M. G. Brik
Summary: This study investigates the correlation between optical properties, local symmetry, and crystal structure in CaF2 and BaF2 fluoride crystals doped with ErF3. The differences in optical properties between CaF2 and BaF2 crystals at room temperature are observed and attributed to the differences in cationic radius and dopant-host ionic radius. The determined symmetries and bond lengths of Er3+- F- ions in both crystals are reported. This study provides valuable insight into the development of lanthanide-doped optical materials.
Article
Materials Science, Multidisciplinary
Wojciech M. Piotrowski, Riccardo Marin, Maja Szymczak, Emma Martin Rodriguez, Dirk H. Ortgies, Paloma Rodriguez-Sevilla, Miroslav D. Dramicanin, Daniel Jaque, Lukasz Marciniak
Summary: Lifetime-based luminescence thermometry enables accurate deep-tissue monitoring of temperature changes, but short lifetimes and poor brightness limit its performance. A solution to these limitations is the design and optimization of luminescent nanothermometers co-doped with transition metal and lanthanide ions, which exhibit strong near-infrared emission and long temperature-dependent photoluminescence lifetime. These nanothermometers, combined with a custom-made instrument, allow for obtaining 2D thermal maps for deep-tissue thermal mapping. This study provides foundations for the deployment of lifetime-based thermometry for accurate deep-tissue temperature monitoring.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bojana Milicevic, Jovana Perisa, Zoran Ristic, Katarina Milenkovic, Zeljka Antic, Krisjanis Smits, Meldra Kemere, Kaspars Vitols, Anatolijs Sarakovskis, Miroslav D. D. Dramicanin
Summary: We present a hydrothermal synthesis method for ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. By varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%), the emissions in the near IR spectral range were analyzed. Structural analysis revealed that Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions significantly affected the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The optimal dopant concentrations for upconversion luminescence were found to be 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Strong upconversion emission of Tm3+ ions around 800 nm was achieved under 980 nm light excitation. The study suggests potential applications of ultrasmall Yb3+/Tm3+ co-doped SLF phosphors in fluorescent labels for bioimaging and security.
Article
Biophysics
Jelena Papan Djanis, Jovana Perisa, Patricija Hribar Bostjancic, Katarina Mihajlovski, Vesna Lazic, Miroslav Dramicanin, Darja Lisjak
Summary: Colloidal stabilization is crucial for the preparation of magnetic nanoparticles for biomedical applications. In this study, tannic acid was used as a coating for barium hexaferrite nanoplatelets (BSHF NPLs) to achieve stability in aqueous media. The coated BSHF NPLs were characterized and their magnetic properties were measured. The stable colloids were tested in biological media, and the antimicrobial properties were examined. To enhance antimicrobial activity, tannic acid was used as a platform for the in-situ production of silver on BSHF NPLs. The hybrid material exhibited magnetic properties and excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Analytical
Tahani A. Alrebdi, Abdullah N. Alodhayb, Zoran Ristic, Miroslav D. Dramicanin
Summary: In this study, the performance of single- and multiparametric luminescence thermometry based on the temperature-dependent spectral features of Ca6BaP4O17:Mn5+ near-infrared emission was investigated. Experimental results showed that as the temperature increased, the intensities of the T-3(2) and Stokes bands increased, while the peak of the E-1 emission band redshifted. The multiparametric luminescence thermometry showed comparable performance to the best single-parameter thermometry.
Article
Physics, Multidisciplinary
Maja S. Rabasovic, Svetlana Savic-Sevic, Janez Krizan, Branko Matovic, Marko Nikolic, Dragutin Sevic
Summary: This paper explores the potential applications of machine learning algorithms in the analysis of optical spectra from Gd2O3:Er,Yb thermophosphor. By training computer software to recognize time-resolved spectra associated with different temperatures, remote temperature estimation can be achieved using deep learning artificial neural networks.
