Article
Chemistry, Applied
Qiang Liu, Wenli Wang, Zhengfa Dai, Vitalii Boiko, Haohong Chen, Xin Liu, Danyang Zhu, Jian Xu, Dariusz Hreniak, Jiang Li
Summary: In this study, Ce3+-doped transparent ceramics were successfully prepared and the effects of Ce3+ concentration and annealing atmospheres on their performance were investigated.
JOURNAL OF RARE EARTHS
(2022)
Article
Materials Science, Ceramics
Wei Xu, Fengze Bai, Longjiang Zheng, Chunhai Hu, Zhiguo Zhang, Yungang Zhang, Zhen Sun
Summary: By doping Ga3+ in garnet-structured phosphors, the upconversion luminescence can be significantly enhanced, leading to color switching in response to temperature change.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Shanchuan Liang, Ti Xie, Nicholas A. A. Blumenschein, Tong Zhou, Thomas Ersevim, Zhihao Song, Jierui Liang, Michael A. A. Susner, Benjamin S. S. Conner, Shi-Jing Gong, Jian-Ping Wang, Min Ouyang, Igor Zutic, Adam L. L. Friedman, Xiang Zhang, Cheng Gong
Summary: Scientists have achieved electrical control of a two-dimensional magnetic insulator by using a thin ferroelectric polymer, which could be used to create compact devices.
NATURE ELECTRONICS
(2023)
Article
Crystallography
Nurgul Zhanturina, Daulet Sergeyev, Zukhra Aimaganbetova, Abzal Zhubaev, Karlygash Bizhanova
Summary: This paper presents the results from simulation of the structural and optical properties of YAG crystal doped with different ions. The study reveals that the concentration of dopants affects the energy levels and transparency of the crystal, which in turn impacts its optical properties.
Article
Materials Science, Multidisciplinary
Michele Back, Jumpei Ueda, Hiroshi Nambu, Masami Fujita, Akira Yamamoto, Hisao Yoshida, Hiromitsu Tanaka, Mikhail G. Brik, Setsuhisa Tanabe
Summary: The electronic structures and thermometric performances of Cr3+-doped alpha-Ga2O3 and beta-Ga2O3 polymorphs were compared, revealing a linear relationship between the T-4(2)-E-2 energy gap and the CF strength Dq. This trend could provide guiding principles for designing effective Cr3+-based Boltzmann thermometers. Additionally, beta-Ga2O3:Cr3+ particles were demonstrated to locally measure thermal variations during a catalytic reaction, showcasing their potential for real-world applications.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Ceramics
Vitaliy G. Goncharov, Nian Wei, Miu Lun Lau, Sue M. Ennaceur, Albert Migliori, Hongwu Xu, Min Long, Xiaofeng Guo
Summary: Resonant ultrasound spectroscopy was used to investigate the effects of Ce doping on the elastic and thermodynamic properties of YAG, revealing significant impacts of Ce doping on the elasticity and thermal conductivity of Ce:YAG, with high Ce concentrations causing notable softening and increased elastic anisotropy. Additionally, calculations of Debye temperatures, heat capacities, and thermal conductivities for Ce:YAGs showed a reduction in these parameters at Ce concentrations >= 1 at. %, and extrapolation to higher temperatures allowed for modeling of thermal stress experienced by Y3-xCexAl5O12 disks up to 1073.15 K.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Xiaomeng Wang, Jiaren Du, Hengwei Lin
Summary: Near-infrared persistent luminescence (NIR PersL) materials have great potential in night vision, biological imaging, and information encryption. This study investigates a series of Gd3MgxGexGa5-2xO12:Cr3+ materials prepared by microwave-assisted solid-state approach and demonstrates the improvement of PersL performance through chemical composition co-substitution. The study also reveals the trap level distribution of Gd3Mg0.5Ge0.5Ga4O12:Cr3+ phosphor and suggests that bandgap reduction and trap distribution optimization facilitate NIR PersL in Cr3+-doped gadolinium gallium garnets.
Article
Chemistry, Physical
A. Belous, A. Tovstolytkin, O. Fedorchuk, Y. Shlapa, S. Solopan, B. Khomenko
Summary: In this study, a method for synthesizing nanosize particles of Y3AlFe4O12 garnet ferrite by precipitation in aqueous solutions at constant pH has been demonstrated. It was found that the filtration coefficient is three times greater when iron and aluminum hydroxides are precipitated simultaneously compared to when all hydroxides are precipitated simultaneously. After treatment at 800 degrees C, crystalline nanoparticles with an average particle size of 60-70 nm are formed. The ceramics obtained after proper heat treatment exhibit high density and good electrophysical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Condensed Matter
Yu Wang, Hao Suo, Leipeng Li, Guoqing Wang, Wenlu Deng, Wenge Ding, Zhijun Wang, Panlai Li, Zhiguo Zhang
Summary: The article discusses the modulation of crystal field strength around Cr3+ ions in doubleperovskite La2MgHfO6 by varying dopant concentration, which affects the thermal sensing behaviors and increases sensitivity. This offers insights into sensitivity optimization of Cr3+-based FIR thermometers for highly accurate temperature measurement.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Optics
Yan Zhang, Shihai Miao, Yanjie Liang, Chao Liang, Dongxun Chen, Xihui Shan, Kangning Sun, Xiao-Jun Wang
Summary: Extensive research on infrared light sources is being conducted due to the growing demand for spectroscopy applications in agriculture, retail, and healthcare. The development of ideal blue-pumped short-wave infrared (SWIR) phosphors is crucial for the design of cost-effective and high-performance phosphor-converted infrared LEDs. In this study, we have developed a series of SWIR-emitting materials with high efficiency and stability by co-doping Cr3+-Yb3+ ion pairs into Lu0.2Sc0.8BO3 host materials. The resulting Lu0.2Sc0.8BO3:Cr3+,Yb3+ phosphor emits intense SWIR light in the 900-1200 nm range under blue light excitation and shows promising potential for practical applications.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Basil Chacko, Avanish Babu Thirumalasetty, Vembakam Vijayakanth, Madhuri Wuppulluri
Summary: This study investigates the viability of yttrium iron garnet (YIG) in magnetic hyperthermia treatment. YIG is synthesized using hybrid microwave-assisted hydrothermal and sol-gel auto combustion techniques. The formation of the garnet phase is confirmed using powder X-ray diffraction studies. The morphology and grain size of the material are analyzed by field emission scanning electron microscopy. The properties and efficiency of YIG in magnetic induction heating are evaluated using specific absorption rates.
Article
Materials Science, Ceramics
Baochen Wang, Cheng Yan, Kaiwei Shen, Weiwei Lin, Yan-gai Liu, Ruiyu Mi, Chao Zeng
Summary: A novel Cr3+ doped broadband NIR garnet Ca3Sc2Ge3O12 phosphor with enhanced luminescence and thermal stability was developed. A high-performance NIR LED was fabricated using this phosphor, with high radiance and photoelectric efficiency.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zhengfa Dai, Vitalii Boiko, Karina Grzeszkiewicz, Marta Markowska, Federica Ursi, Jorma Holsa, Maria Luisa Saladino, Dariusz Hreniak
Summary: YAGG materials doped with Ce3+, Cr3+ and Pr3+ were synthesized and annealed at temperatures between 900 and 1500 degrees C. High annealing temperatures led to sintering and agglomeration, resulting in larger particles and broader size distributions. The energy transfer efficiency and luminescence intensity increased with increasing annealing temperatures, and the O-H vibrations did not significantly affect the multi-phonon de-excitation of the emitting 5d level of Ce3+ at temperatures above 900 degrees C.
Article
Physics, Applied
Yasuyuki Shimura, Kanta Watanabe, Takanori Taniguchi, Kotaro Osato, Rikako Yamamoto, Yuka Kusanose, Kazunori Umeo, Masaki Fujita, Takahiro Onimaru, Toshiro Takabatake
Summary: Ytterbium-based heavy-fermion metals have recently attracted attention as magnetic refrigeration materials that can generate low-temperature environments below 1 K without using expensive He-3. YbCu4Ni exhibits a large value of specific heat divided by temperature, indicating high potential for magnetic refrigeration. This study reports successful magnetic refrigeration down to 0.2 K using YbCu4Ni ingots installed in a commercial He-4 refrigerator, with consistent results from DC magnetization and specific heat measurements.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Zhibin Chen, Dongmei Wang, Lehui Liu, Feifei Yuan, Yisheng Huang, Lizhen Zhang, Zhoubin Lin
Summary: A new near-infrared tunable laser crystal, Cr3+ doped Ca3(VO4)2 crystal (Cr: CVO), was successfully grown by the Czochralski method. The crystal structure, thermal expansion, and substitution mechanism of Cr: CVO crystal were investigated. The Cr: CVO crystal exhibited strong and broad absorption at visible wavelengths and broad emission in the near-infrared region. The formation of lattice distortion and vacancy due to Cr3+ substitution led to the broadening of the emission band. This study provides guidance for the design of broadband luminescent materials and highlights the potential of Cr: CVO as a tunable laser crystal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Magdalena Kulpa-Greszta, Anna Tomaszewska, Emilia Zachanowicz, Piotr Krzeminski, Robert Pazik
Summary: Hybrid materials composed of inorganic magnetic cobalt-manganese mixed nanoferrites and PMMA polymeric shell were fabricated by an in-situ polymerization process. The hybrid materials showed a high response to both alternating magnetic field and laser radiation, with the highest temperature achieved when both stimuli were applied synergistically.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Aleksandra J. Pelczarska, Dagmara Stefanska, Adam Watras, Lucyna Macalik, Irena Szczygiel, Jerzy Hanuza
Summary: KMeY(PO4)(2):5% Eu3+ phosphates were synthesized by a hydrothermal method and their spectroscopic, structural, and morphological properties were investigated. The obtained samples had an average crystal diameter of about 15 nm and showed improved crystallinity after thermal treatment. The luminescent properties of the samples were also enhanced, with the KSrY(PO4)(2):5% Eu3+ sample calcinated at 500 degrees C exhibiting the most intense emission.
Article
Chemistry, Physical
Krzysztof Marycz, Anna Kowalczuk, Eliza Turlej, Emilia Zachanowicz, Anna Tomaszewska, Magdalena Kulpa-Greszta, Martyna Kepska, Zofia Steczkiewicz, Robert Pazik
Summary: The impact of polyrhodanine (PRHD) and its derivatives on pre-osteoblasts and osteoclasts was compared, showing that PRHD and its modification at ratio 10/90 can improve pre-osteoblast's proliferative abilities and reduce osteoclast function, which is strongly correlated with the development and arrangement of cytoskeleton and mitochondrial network.
Article
Chemistry, Physical
Magdalena Kulpa-Greszta, Maciej Wnuk, Anna Tomaszewska, Jagoda Adamczyk-Grochala, Andrzej Dziedzic, Iwona Rzeszutek, Bartosz Zarychta, Dominika Bloniarz, Anna Lewinska, Robert Pazik
Summary: The anisotropy of magnetic nanoparticles has been controlled by modifying their shape, and the efficiency of energy conversion and their effects on normal and cancer cells have been studied. Specific shape nanoparticles induce cell death, while lower concentrations stimulate antioxidative and anti-inflammatory response in normal cells.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Natalia Miniajluk-Gawel, Robert Tomala, Bartosz Bondzior, Przemyslaw Jacek Deren
Summary: Ba2MgWO6: Eu3+ (BMW: Eu3+) ceramic materials with a double perovskite structure were successfully sintered using the High-Pressure Low-Temperature sintering (HPLT) technique with optimal parameters T = 500 degrees C, p = 8 GPa, and t = 1 min. The research revealed that increasing temperature caused increased extinction of luminescence, increasing pressure led to faster non-radiative transitions, and extending sintering time enhanced luminescence output.
Article
Chemistry, Inorganic & Nuclear
Magdalena Kulpa-Greszta, Anna Tomaszewska, Andrzej Dziedzic, Robert Pazik
Summary: Different types of ferrite core-shell structures were prepared through the seed-mediated approach, including CoFe2O4@CoFe2O4, CoFe2O4@Fe3O4, CoFe2O4@MnFe2O4, and CoFe2O4@MnFe2O4@ZnFe2O4. This synthetic method offers great flexibility in engineering multi-shell ferrite nanoparticles, which can be further applied in various advanced applications. The particle size tuning of homo- and heterostructures can be easily achieved by controlling the concentration of metal acetylacetonates without changing the synthetic parameters.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Thi Tuyet Doan, Thanh Quang Le, Boi An Tran, Tung Cao -Thanh Pham, Ravi Teja Velpula, Mano Bala Sankar Muthu, Hieu Pham Trung Nguyen, Quan Thi Hong Vu, Przemyslaw Jacek Deren, Hoang -Duy Nguyen
Summary: Red-emitting alumina nanophosphors doped with Mn4+ and Mg2+ (Al2O3:Mn4+, Mg2+) were synthesized using a hydrothermal method and Pluronic surfactant. The nanophosphors showed different phases depending on the annealed temperature, with cube-like nanoparticles observed at 500-1000°C. The phosphors exhibited strong red emission at 678 and 692 nm due to the transitions of Mn4+ ions, and displayed excellent waterproof ability and thermal stability. Combining the nanophosphors with InxGa(1-x)N nanowire chips, warm-white LEDs with high color rendering index and low correlated color temperature were achieved. The use of nanophosphors also improved the current-voltage characteristic of the LEDs.
Article
Optics
T. H. Q. Vu, Bartosz Bondzior, Dagmara Stefanska, Przemyslaw J. Deren
Summary: In this study, Nd3+-doped Ba2MgWO6 (BMW) is reported as a potential remote luminescent thermometer, operating up to 673 K. The crystal structure, morphology, and luminescence of the samples were characterized. The temperature sensing ability of Ba2MgWO6 was evaluated for the first time using the thermally coupled Nd3+ levels and emissions ratio of Nd3+ ions and the host. The results demonstrate that BMW: Nd3+ double perovskite has great potential as an optical thermometer in a wide operating temperature range, especially in low temperatures.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Natalia Miniajluk-Gawel, Bartosz Bondzior, Vasyl Kinzhybalo, Wroclaw Maciej Ptak, Thi Hong Quan Vu, Przemyslaw Jacek Deren
Summary: In order to improve the quality of WLEDs, this study synthesized four novel phosphors, 1%Eu3+ doped La2MgTiO6, La2ZnTiO6, Lu2MgTiO6, and Lu2ZnTiO6, by the co-precipitation method. The crystal structure, absorption, excitation, and emission spectra of all samples were investigated. Different luminescent behaviors were observed, with Lu-based hosts exhibiting dominant emission from magnetic dipole transition and the others showing strongest emission from forced electric dipole transition. Furthermore, the four titanate compounds displayed distinct mechanisms of cross relaxation. These findings contribute to the understanding of the two novel pyrochlore hosts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Bartosz Bondzior, Thu Hoang, T. H. Quan Vu, Przemysaw J. Deren, Laeticia Petit
Summary: The thermometric sensitivity of different Eu3+ doped glasses in different glass systems was theoretically calculated using the Judd-Ofelt parameters and compared to experimental data. The study aimed to test the limitations of thermal sensitivity estimation using Judd-Ofelt parameters in various glass systems. Discrepancies between theoretical and experimental values were observed in germanate and tellurite glasses due to their low phonon energies, which caused the failure of the Boltzmann model. Phosphate glasses, with their high absolute thermometric sensitivity, are promising materials for luminescence thermometers.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
N. Miniajluk-Gawel, B. Bondzior, M. Podgorny, P. J. Deren
Summary: This study describes the synthesis of Pr3+-doped Ba2MgWO6 powder samples by two different methods (coprecipitation and solid-state reaction) for improving the quality of white LED lighting. The results show that the samples synthesized by the solid-state method have better spectroscopic properties due to the fewer defects present.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Thi Tuyet Doan, Thanh Quang Le, Boi An Tran, Tung Cao-Thanh Pham, Ravi Teja Velpula, Mano Bala Sankar Muthu, Hieu Pham Trung Nguyen, Quan Thi Hong Vu, Przemyslaw Jacek Deren, Hoang-Duy Nguyen
Summary: Red-emitting alumina nanophosphors doped with Mn4+ and Mg2+ (Al2O3:Mn4+, Mg2+) were synthesized by a hydrothermal method. The prepared samples exhibited different phases depending on the annealing temperature, with cubic gamma-Al2O3 phase at 500°C, tetragonal delta-Al2O3 phase at 1000°C, and rhombohedral alpha-Al2O3 phase at 1300°C. The emission spectra showed strong peaks at 678 and 692 nm due to Mn4+ ion transitions. The nanophosphors had excellent waterproof ability and thermal stability. Additionally, the nanophosphors improved the current-voltage characteristic of nanowire LEDs due to increased heat dissipation.
Article
Materials Science, Multidisciplinary
Bartosz Bondzior, Chi Nguyen, T. H. Quan Vu, Przemyslaw J. Deren, Laeticia Petit
Summary: The method of directly introducing crystals of known chemistry, size, and optical properties into a glass matrix is useful in overcoming limitations in controlling crystal growth in glass-ceramics. By measuring changes in micro-luminescence spectra, it is possible to track the decomposition of crystals inside the composite material. It has been shown, for the first time, that adding Eu3+-doped LaPO4 crystals to phosphate fluoride glasses enhances the thermometric sensitivity of Eu3+ ions, making it promising for temperature sensing applications.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Chemistry, Multidisciplinary
Magdalena Kulpa-Greszta, Anna Tomaszewska, Anna Michalicha, Daniel Sikora, Andrzej Dziedzic, Renata Wojnarowska-Nowak, Anna Belcarz, Robert Pazik
Summary: Multipurpose Fe3O4@APTES-Ag heterostructures were fabricated for mutual heat generation, SERS probing, and antimicrobial activity. The heterostructures demonstrated effective heat generation, high capability for Raman signal augmentation, and antibacterial activity against P. aeruginosa. This study highlights the promising potential of Fe3O4@APTES-Ag as a multipurpose platform for biological applications.
Article
Chemistry, Inorganic & Nuclear
T. H. Q. Vu, B. Bondzior, D. Stefanska, P. J. Deren
Summary: This study reports the potential of Ba2MgWO6 doped with Er3+ as a candidate for white-light emitting phosphor and noncontact luminescent thermometry. The highest emission intensity is observed in a sample doped with 4% Er3+, while Ba2MgWO6 with 0.5% Er3+ generates high-quality white light. The noncontact luminescent thermometers based on Er3+ exhibit a highest sensitivity Sr of 2.78% K-1 at 198 K.
DALTON TRANSACTIONS
(2022)
