Article
Chemistry, Inorganic & Nuclear
Qian Sun, Xin Sui, Qin-Yu Zhu, Shan -Shan Zhu, Xu-Sheng Gao, Xiao-Ming Ren
Summary: In this study, a stable MOF solid solution, Eu0.05Y0.95-PTC, was synthesized and used to prepare temperature-sensitive Eu0.05Y0.95-PTC@PVA hydrogels with excellent mechanical performance. Both the solid solution and hydrogel showed temperature sensing capabilities and good recyclability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Zhuqin Wu, Leipeng Li, Xiaohuan Lv, Hao Suo, Chongyang Cai, Pinshu Lv, Mingfeng Ma, Xingqiang Shi, Yanmin Yang, Lukasz Marciniak, Jianrong Qiu
Summary: Luminescence intensity ratio (LIR)-based temperature sensing technology has been a research focus in the past two decades. However, the traditional LIR thermometry requires continuous exposure to an excitation source, which may affect temperature accuracy. To overcome this limitation, a new thermometry method using NaYF4:Er3+ with long persistent luminescence is proposed. The persistent luminescence intensity ratio (PLIR) between two green luminescent bands of NaYF4:Er3+ is demonstrated to be a reliable indicator of temperature, without the need for continuous exposure to an irradiation source.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Optics
Jiwen Chang, Yu Wang, Zixuan Zhang, Dongxu Guo, Peihang Zhao, Nan Wang, Zhijun Wang, Leipeng Li, Panlai Li, Hao Suo
Summary: In this work, a unique class of double-tungstate phosphors is reported that exhibit near-unity quantum yield of Tb3+ and Eu3+ emissions. The activator ions can be isolated to confine absorbed photon energy, resulting in high quenching concentration. The thermal enhancement of Tb(3+) emissions is achieved through interionic cross-relaxation, providing excellent thermal sensitivity and resolution for single-band ratiometric thermometry.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Ceramics
Yuanbo Yang, Panlai Li, Zixuan Zhang, Zhijun Wang, Hao Suo, Leipeng Li
Summary: Rational design of single-band ratiometric (SBR) thermometers has gained significant attention, but the intensity of the excited state absorption mechanism is often unsatisfactory. In this study, a novel SBR temperature measurement method relying on Sm3+-doped calcium tungstate is proposed, featuring opposite responses of charge-transfer and ground-state absorption mechanisms to temperature changes. The relative sensitivity can be flexibly modulated by adjusting excitation modes, with a maximum relative sensitivity of 1.98% per K at 318 K.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
K. Trejgis, K. Ledwa, A. Bednarkiewicz, L. Marciniak
Summary: Luminescence thermometry (LT) is a remote temperature monitoring technique that uses the single-band ratiometric (SBR) approach for temperature readout. The study investigates the thermometric properties of a single-band ratiometric thermometer based on nanosized NaYF4 and NaGdF4 fluorides doped with Eu3+ ions and reveals a high relative temperature sensitivity in the higher temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Ilya E. Kolesnikov, Daria Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Gongxun Bai, Evgenii Yu Kolesnikov
Summary: Single doped CaWO4:Er3+ phosphors were synthesized and studied for optical thermal sensing within a wide temperature range. The ratiometric strategy using two luminescence intensity ratios improved thermometric characteristics and expanded the working temperature range. The thermometric performances of the samples were evaluated, and it was found that LIR1 had high sensitivity while LIR2 provided more accurate thermal sensing. The results indicate that CaWO4:Er3+ phosphors have potential in dual-mode thermal sensing.
Article
Chemistry, Analytical
Shuyi He, Steven Wu
Summary: This article reports a ratiometric temperature sensing technology based on polymer dots-Eu nanoparticles, which have unique characteristics such as high water solubility, good light stability, excellent biocompatibility, and low cost. The probe utilizes the red/blue fluorescence intensity ratio to monitor temperature change, and shows good accuracy and high sensitivity for temperature detection in vitro, making it suitable for monitoring temperature change in cells.
Article
Materials Science, Multidisciplinary
Joanna Stefanska, Lukasz Marciniak
Summary: The potential of using Pr3+ ions for multi-color emission luminescence thermometry has been explored, showing that modulation of the thermometric properties can be achieved by activating the cross-relaxation phenomenon through dopant concentration. It is found that both high and low dopant concentrations are optimal for sensitive temperature readouts in the red and yellow spectral ranges, respectively, making Pr3+ ions promising candidates for SBR thermometry.
ADVANCED PHOTONICS RESEARCH
(2021)
Article
Optics
Yuanbo Yang, Leipeng Li, Hao Suo, Panlai Li, Zhijun Wang, Zhiguo Zhang
Summary: A new single-band ratiometric (SBR) thermometry is proposed by combining the temperature-induced red shift of charge transfer state (CTS) of W-O and Eu-O with the ground state absorption (GSA) and excited state absorption (ESA) of Eu3+. The SBR thermometry of Eu3+ doped calcium tungstate shows the highest relative sensitivity of 1.25% K-1 at 573K, surpassing conventional luminescent ratiometric thermometry methods.
Article
Optics
Luyao Pu, Panlai Li, Jiaoyin Zhao, Yu Wang, Dongxu Guo, Leipeng Li, Zhijun Wang, Hao Suo
Summary: This study reports a novel single-band ratiometric (SBR) thermometric scheme in Sc2Mo3O12:Eu3+ nanosheet based on the thermal enhancement of charge-transfer state absorption between O2- and Eu3+. Mechanistic investigation reveals the crucial role of lattice negative thermal expansion (NTE) in thermally enhanced Eu3+ emissions. In contrast, severe thermal quenching of Eu3+ emissions is observed under excitation wavelength corresponding to ground state absorption. The wavelength-dependent thermal behavior enables high sensitivity and resolution for SBR thermometry (S-r = 2.0% K-1, delta T = 0.121 K at 363 K). The applicability of the proposed SBR model is demonstrated using a flexible thin-film for accurate and real-time temperature detection at local hotspots in electronic components.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
K. Trejgis, Feng Tian, Jiang Li, A. Bednarkiewicz, L. Marciniak
Summary: The study found that the size of phosphors and surface quenching processes can affect the sensitivity of luminescent thermometers, leading to a reduction in usable temperature range.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Multidisciplinary
Chuan Liao, Feng Chen, Hao Wu, Huajun Wu, Liangliang Zhang, Guo-hui Pan, Feng Liu, Xiao-jun Wang, Jiahua Zhang
Summary: The highly sensitive afterglow intensity ratio (AIR) thermometry based on thermal quenching (TQ) mechanism using Y3Al2Ga3O12:Pr3+ persistent phosphor is reported. The AIR shows strong temperature dependence in the range of 30-170 degrees C, with a maximum relative sensitivity of up to 4.12% degrees C-1 at 170 degrees C. The method is demonstrated by accurately measuring water temperature with an error of only 0.1 degrees C.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Sylwia Ryszczynska, Inocencio R. Martin, Tomasz Grzyb
Summary: Recently, the upconversion phenomenon has attracted attention in luminescence thermometry due to its potential for precise and remote optical thermal sensing. In this study, unique nanoparticles were synthesized and showed significant changes in emission intensity with temperature. By comparing the luminescence intensity ratios of the near-infrared bands, we demonstrate that they possess unique and excellent optical temperature sensing properties.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Joanna Drabik, Lukasz Marciniak
Summary: The luminescence thermometry method utilizes the strong thermal dependence of thermally induced excited state absorption to improve temperature readout parameters, and can be applied for 2D thermal imaging of microelectronic printed circuit boards using the strong color changes exhibited by phosphors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Wei-Ni Miao, Bing Liu, Hong Li, Shu-Jin Zheng, Huan Jiao, Ling Xu
Summary: This work presents the study of three series of Eu/Tb metal-organic frameworks and investigates their fluorescence properties through fluorescence spectra. The Eu/Tb ratio was optimized to select specific ligands for temperature sensing tests, and the effect of ligand energy levels on the fluorescence properties was analyzed. One of the materials showed sufficient sensitivity for noncontact temperature measurements.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Irina M. Shubina, Ilya E. Kolesnikov, Pavel K. Olshin, Marina Likholetova, Mikhail D. Mikhailov, Alina A. Manshina, Daria Mamonova
Summary: This article introduces an inexpensive synthesis method for producing various types of particles. The author conducted analysis on the morphology, structure, and optical properties of the synthesized particles, and found that using K2CO3 as an additive resulted in smaller-sized particles with higher crystallinity and a 1.7 times increase in luminescence intensity. Additionally, the author also discovered that the combination of particle characteristics is dependent on composition, synthesis method, and structure, making these particles promising candidates for safety marker applications.
CERAMICS INTERNATIONAL
(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
Nanoscience & Nanotechnology
Ilya E. Kolesnikov, Daria Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Gongxun Bai, Evgenii Yu Kolesnikov
Summary: Single doped CaWO4:Er3+ phosphors were synthesized and studied for optical thermal sensing within a wide temperature range. The ratiometric strategy using two luminescence intensity ratios improved thermometric characteristics and expanded the working temperature range. The thermometric performances of the samples were evaluated, and it was found that LIR1 had high sensitivity while LIR2 provided more accurate thermal sensing. The results indicate that CaWO4:Er3+ phosphors have potential in dual-mode thermal sensing.
Article
Biochemistry & Molecular Biology
Ilya Kolesnikov, Daria Mamonova, Dmitrii Pankin, Gulia Bikbaeva, Anastasia Khokhlova, Anna Pilip, Anastasia Egorova, Vladislav Zigel, Alina Manshina
Summary: Phosphonate-fullerene hybrids are a new generation of compounds that exhibit bioactivity, photoswitchable properties, and high selectivity of response to light wavelength. Experimental results show that these hybrids have increased cholinesterase inhibition compared to pure phosphonates and demonstrate pronounced changes in inhibition degree under laser irradiation.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Chemistry, Physical
Hao Li, Yingjie Zhao, Ilya Kolesnikov, Shiqing Xu, Liang Chen, Gongxun Bai
Summary: This study successfully developed rare earth ions-doped Ba2LaF7 nanocrystals as the core material in a multi-functional system for photothermal therapy. Optical temperature measurement based on fluorescence intensity ratio improved sensitivity, and the nanocrystals showed a good photothermal response to laser pumping power and could be used for photothermal imaging.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Kamila R. Enikeeva, Aliia V. Shamsieva, Anna G. Strelnik, Robert R. Fayzullin, Dmitry V. Zakharychev, Ilya E. Kolesnikov, Irina R. Dayanova, Tatiana P. Gerasimova, Igor D. Strelnik, Elvira I. Musina, Andrey A. Karasik, Oleg G. Sinyashin
Summary: Tertiary diethylpyridylphosphine was synthesized by reaction of pyridylphosphine with bromoethane in suberbasic medium. The reaction of phosphine with copper(I) iodide formed a copper(I) coordination polymer with an intermediate structure containing a copper-halide core. The obtained coordination polymer exhibited green and red emissions, and depolymerization resulted in the formation of a complex with the octahedral structure of the copper-halide core. The coordination polymer can serve as a sensor or detector for overheating processes that need to be maintained at temperatures below 138 degrees C.
Article
Chemistry, Physical
Evgenii V. Borisov, Alexey A. Kalinichev, Ilya E. Kolesnikov
Summary: ZnTe crystal is applied for precise thermal sensing for cryogenic temperatures. By using Raman and photoluminescence spectroscopy, the operating temperature range and reliability of the thermometers are improved. Raman-based temperature sensing is applicable in the range of 20-100 K, while luminescence-based thermometry is used in a narrower range of 20-70 K with better thermal sensitivity and temperature resolution. The study demonstrates the potential of ZnTe crystal as a multimode contactless optical sensor for cryogenic thermometry.
Article
Chemistry, Multidisciplinary
Anna A. A. Vasileva, Daria V. V. Mamonova, Yuri V. V. Petrov, Ilya E. E. Kolesnikov, Gerd Leuchs, Alina A. A. Manshina
Summary: We propose an efficient method for creating stable electrocatalytically active nanocomposites by combining in situ synthesis of polyaniline (PANI) with laser-induced deposition of metal nanoparticles (NPs). The use of the substrate during the formation of multi-metallic nanoparticles (MNP) solves the problem of particle loss from the electrode surface. The PANI/AgPt nanocomposites show the best activity and stability in electrocatalysis.
Article
Materials Science, Ceramics
Ilya E. Kolesnikov, Daria Mamonova, Mikhail A. Kurochkin, Vassily A. Medvedev, Evgenii Yu Kolesnikov
Summary: In recent years, contactless thermal sensing has made significant progress due to the rapid development of luminescence thermometry. However, there is still room for improvement in the thermometric performances of these sensors. Most optical thermometers rely on a single temperature-sensitive luminescence parameter, but multiparametric readouts could enhance the reliability and broaden the working range of temperature measurements.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Aleksandra A. Vidyakina, Andrey A. Shtyrov, Mikhail N. Ryazantsev, Alexander F. Khlebnikov, Ilya E. Kolesnikov, Vladimir V. Sharoyko, Dar'ya Spiridonova, Irina A. Balova, Stefan Braese, Natalia A. Danilkina
Summary: Fluorescent isocoumarin-fused cycloalkynes have been developed, which react in SPAAC and give fluorescent triazoles regardless of the azide nature. The introduction of a pi-acceptor group at the C6 position of the isocoumarin ring converts the non-fluorescent cycloalkyne/triazole pair to its fluorescent counterpart. The design of the fluorescent cycloalkyne/triazole pairs is based on theoretical studies of the deactivation mechanism and electron density redistribution.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Viktor G. G. Nosov, Yulia N. N. Toikka, Anna S. S. Petrova, Oleg S. S. Butorlin, Ilya E. E. Kolesnikov, Sergey N. N. Orlov, Mikhail N. N. Ryazantsev, Stefaniia S. S. Kolesnik, Nikita A. A. Bogachev, Mikhail Yu. Skripkin, Andrey S. S. Mereshchenko
Summary: Luminescent, heterometallic terbium(III)-lutetium(III) terephthalate metal-organic frameworks (MOFs) were synthesized using two methods: synthesis from diluted and concentrated solutions. The synthesized samples showed different crystalline phases depending on the concentration of Tb3+. The compounds corresponding to the Ln(2)bdc(3) crystalline phase demonstrated significantly higher photoluminescence quantum yields (PLQY) compared to other phases due to the absence of quenching from water molecules. One of the synthesized materials, (Tb0.1Lu0.9)(2)bdc(3)center dot 1.4H(2)O, showed a high PLQY of 95%, making it one of the most efficient Tb-based MOFs.
Article
Chemistry, Physical
Viktor G. Nosov, Anna A. Betina, Tatyana S. Bulatova, Polina B. Guseva, Ilya E. Kolesnikov, Sergey N. Orlov, Maxim S. Panov, Mikhail N. Ryazantsev, Nikita A. Bogachev, Mikhail Yu Skripkin, Andrey S. Mereshchenko
Summary: Luminescent NaYF4:Sm3+ nano- and microcrystalline materials co-doped with La3+, Gd3+, and Lu3+ ions were synthesized using the hydrothermal method. The synthesis process involved the use of rare earth chlorides as precursors and citric acid as a stabilizing agent. The synthesized materials exhibited a beta-NaYF4 crystalline phase, except for those with high La3+ content which formed LaF3. Particle size was significantly affected by the type and content of doping REE. Excitation at 400 nm resulted in distinct emission peaks in the visible spectrum due to transitions of the Sm3+ ion. Increasing the Sm(III) content led to concentration quenching, with an optimum concentration of 2%. Co-doping with non-luminescent La3+, Gd3+, and Lu3+ ions increased the emission intensity, explained by the viewpoint of Sm3+ local symmetry.
Article
Chemistry, Multidisciplinary
Anna A. Vasileva, Daria V. Mamonova, Vladimir Mikhailovskii, Yuri V. Petrov, Yana G. Toropova, Ilya E. Kolesnikov, Gerd Leuchs, Alina A. Manshina
Summary: This paper presents a new methodology for creating 3D ordered porous nanocomposites using anodic aluminum oxide template with polyaniline (PANI) and silver NPs. The approach involves in situ synthesis of polyaniline on templates and laser-induced deposition of Ag NPs on the pore walls. The developed structures demonstrated effectiveness as non-enzymatic electrochemical sensors for glucose detection in a concentration range crucial for medical applications.
Article
Chemistry, Multidisciplinary
T. S. Bulatova, A. A. Betina, V. G. Nosov, I. E. Kolesnikov, N. A. Bogachev, M. Yu. Skripkin, E. M. Khairullina, A. S. Mereshchenko
Summary: Microcrystalline phosphors NaY0.8-xYb0.2HoxF4 (x = 0-0.1) were synthesized by the hydrothermal method and it was found that holmium(III) ions replaced yttrium ions, leading to the maximum intensity of up-conversion emission.
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Ilya E. Kolesnikov, Daria V. Mamonova, Mikhail A. Kurochkin, Mikhail A. Khodasevich, Vassily A. Medvedev, Evgenii Yu. Kolesnikov, Alina A. Manshina
Summary: Luminescence thermometry offers remote temperature sensing with high spatial and temporal resolution. Several strategies have been explored to maximize the performance of these thermal sensors, including the use of multiple temperature-sensitive parameters. In this study, luminescence thermometry based on single parameter monitoring (LIR, spectral line position, and bandwidth) was compared with multiparametric sensing based on principal component analysis. The results showed that multiparametric thermometry outperformed the classical single parameter approach, offering potential for further enhancement of the thermometric performances of luminescence thermometers through data calibration.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)