Article
Optics
Shaobo Cui, Li Tao, Wen Kiat Chan, Donglei Zhou, Zhongzheng Yu, Wen Xu
Summary: Lanthanide-doped luminescent nanocrystals have potential applications in the NIR-II imaging and biology sensors. This study investigates the concentration-dependent upconversion luminescence (UCL) and downconversion luminescence (DCL) mechanism in core-shell upconversion nanocrystals (UCNCs). The results show that the luminescence of UCNCs is influenced by the non-radiative rate between activators and the energy transfer rate. Dual-mode anti-counterfeiting imaging is successfully fabricated using UCNCs.
Article
Materials Science, Multidisciplinary
Tao Pang, Yanyan Wu, Yujian Zhang, Ronghua Jian, Junwen Mao, Hong Wang, Hai Guo
Summary: This study demonstrates that the temperature effect on UC luminescence in NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals is strongly dependent on the exciting wavelength. The UC luminescence shows good resistance to thermal quenching when excited using 808 nm radiation. The research provides a novel strategy for anti-thermal quenching of upconversion luminescence with potential applications in dynamic UC anti-counterfeiting, NIR-I-responsive thermometers, and nanoheating.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Optics
Yansong Feng, Zhi Li, Qiqing Li, Jun Yuan, Langping Tu, Lixin Ning, Hong Zhang
Summary: Internal hydroxyl impurities have been identified as detrimental factors affecting the upconversion efficiency of upconversion luminescence nanomaterials. By quantifying and adjusting the internal hydroxyl impurity in NaYF4 nanocrystals, researchers have unraveled the microscopic interactions underlying UCL quenching and proposed a concept of Survivor effect to explain the UC dynamical process involving internal hydroxyl. The new quantitative insights obtained from this study are expected to promote the development of highly efficient UC materials.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Physics, Applied
Pratik S. Solanki, Sangeetha Balabhadra, Michael F. Reid, Jon-Paul R. Wells
Summary: We studied the properties of KYF4:Yb/Er nanoparticles in both cubic and hexagonal phases. The cubic phase was obtained through hydrothermal synthesis, and the transformation to hexagonal phase was achieved by annealing at 500℃. The hexagonal phase exhibited much stronger green and red fluorescence compared to the cubic phase. The thermal sensitivity of the nanoparticles was also measured, showing high values for both phases.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Fengkai Shang, Chunhai Hu, Wei Xu, Xin Zhu, Di Zhao, Wenbin Zhang, Zhiguo Zhang, Wenwu Cao
Summary: Rare earth ions activated nanomaterials show promise for optical thermometry due to their unique photoluminescence characteristics. By utilizing phonon-assisted energy transfer, sensitive temperature measurement has been achieved with maximum relative sensitivities of approximately 2.3% K-1 in specific temperature ranges. Laser-induced heating effect significantly influences measurement sensitivity, but can be enhanced by utilizing square wave laser excitation in physiological temperature region.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Bin Fang, Yu Shen, Bo Peng, Hua Bai, Limin Wang, Jiaxin Zhang, Wenbo Hu, Li Fu, Wei Zhang, Lin Li, Wei Huang
Summary: This article summarizes the advances of small-molecule quenchers used in FRET-based probes, and provides suggestions for the rational design and selection of fluorophore-quencher FRET pairs that are compatible with challenging analytical applications in various biological systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Optics
O. K. Alimov, M. E. Doroshenko, A. Sh. Yarmukhamedov, K. A. Pierpoint, H. Shodiev
Summary: The spectral-kinetic characteristics of Nd3+ optical centers in Sr3LaNb3O12 crystals were studied using selective laser spectroscopy technique. The luminescence decay of A centers was found to be quenched by ordered ensemble of B centers in the first stage, and disordered with Fo spacing diaeresis rster law in the second stage. The ion-ion interaction parameters and the luminescence quenching mechanism were calculated and determined, showing the dipole-dipole interaction for A centers. The luminescence kinetics in B centers with unequal lifetimes of donors and acceptors were also determined.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Marta Lovisari, Robert Gericke, Brendan Twamley, Aidan R. McDonald
Summary: High-valent metal-halides are effective oxidants compared to traditional metal-oxygen adducts, with a greater thermodynamic driving force that allows for superior oxidation of substrates.
INORGANIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Juniastel Rajagukguk, Jonny H. Panggabean, C. S. Sarumaha, P. Kanjanaboos, N. Phuphathanaphong, S. Kothan, J. Kaewkhao, Mitra Djamal
Summary: The motivation for this research is the lack of emission spectra using directly pumped laser diodes. In this study, the luminescence properties of a co-doped laser material were explored using a diode laser as an optical pump. The results showed that the lithium-fluorophosphate glass doped with Nd3+-Er3+/Nd3+-Pr3+ ions exhibited strong emission at 1056 nm and allowed for energy transfer.
Article
Engineering, Environmental
Simranjit Singh, Shivanand H. Nannuri, Sajan D. George, Swaroop Chakraborty, Anurag Sharma, Superb K. Misra
Summary: A novel tri-dopant upconversion nanoparticle system was synthesized for dye degradation studies, with neodymium (Nd3+) dopant enhancing the efficiency of dye degradation. X-ray diffraction studies showed that the presence of Nd3+ led to a reduction in particle size. The presence of Nd3+ widened the absorption spectra of upconversion nanoparticles in both the visible and near-infrared range.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Biao Zheng, Jinquan Hong, Bohao Chen, Ying Chen, Ruoqian Lin, Chunlei Huang, Cheng Zhang, Jun Wang, Lin Lin, Zhiqiang Zheng
Summary: In this study, QC luminescent materials KYF4:Tb3+,Yb3+ phosphors were successfully synthesized and characterized. Various spectroscopic properties were investigated, helping to provide experimental data and theoretical guidance for developing novel luminescent materials.
RESULTS IN PHYSICS
(2021)
Article
Optics
Michael Laube, Thomas Juestel
Summary: This work investigates the energy transfer between neodymium and gadolinium in the host material Lu3Al5O12. The emission spectra and intensity were found to depend strongly on the Gd3+ concentration, with the sample (Lu2.82Nd0.03Gd0.15)Al5O12 showing the highest emission intensity. Temperature and time dependent photoluminescence of the Gd3+ transition was also studied.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Kamila Maciejewska, Lukasz Marciniak
Summary: This paper presents a systematic study on the role of synthesis parameters in the morphology of YPO4:Yb3+, Nd3+ nanocrystals and their impact on the performance of luminescent thermometers. It shows that by adjusting the ratio and concentration, the characteristics of the nanocrystals can be modified, thus affecting the temperature parameters of the thermometer.
Article
Optics
Hui Xu, Sanyang Han, Renren Deng, Qianqian Su, Ying Wei, Yongan Tang, Xian Qin, Xiaogang Liu
Summary: The coordination of bidentate picolinic acid molecules on the surface of nanoparticles can significantly enhance four-photon upconversion, providing new insights into the development of highly emissive nanohybrids. By modulating surface coordination, the reconstruction of orbital energy levels and crystal-field splitting can enhance energy transfer efficiency, offering a new platform for optical interrogation systems at the single-particle level.
Article
Chemistry, Analytical
Philipp U. Bastian, Nathalie Robel, Peter Schmidt, Tim Schrumpf, Christina Guenter, Vladimir Roddatis, Michael U. Kumke
Summary: This study investigated the ion migration in the host lattices of core-shell structures and found that thinner intermediate insulating shells lead to higher acceptor concentration and stronger sensitization of acceptors. The choice of host lattice and synthesis temperature are important parameters to consider for the intermixing process.
Article
Biochemistry & Molecular Biology
Valentina A. A. Petrova, Iosif V. V. Gofman, Natallia V. V. Dubashynskaya, Alexey S. S. Golovkin, Alexander I. I. Mishanin, Elena M. M. Ivan'kova, Dmitry P. P. Romanov, Albert K. K. Khripunov, Elena N. N. Vlasova, Alexandra V. V. Migunova, Alexander E. E. Baranchikov, Vladimir K. K. Ivanov, Alexander V. V. Yakimansky, Yury A. A. Skorik
Summary: New composite films were prepared by incorporating bacterial cellulose nanofibers and cerium oxide nanoparticles into chitosan matrices. The amount of nanofillers affected the structure and properties of the composites, including film stiffness and strength. Increasing the concentration of nanoceria improved the biocompatibility and adhesion of the films to mesenchymal stem cells. These nanocomposite films exhibit favorable properties for use as matrix materials in cell culture and wound dressings.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biotechnology & Applied Microbiology
Mikhail Yu. Mashkin, Marina A. A. Tedeeva, Anna A. A. Fedorova, Evgeniya R. R. Fatula, Alexander V. V. Egorov, Stanislav V. V. Dvoryak, Konstantin I. I. Maslakov, Alexander V. V. Knotko, Alexander E. E. Baranchikov, Gennadii I. I. Kapustin, Dmitrii I. I. Petukhov, Tatyana B. B. Shatalova, Igor V. V. Morozov, Leonid M. M. Kustov, Alexander L. L. Kustov
Summary: In this study, CexZr1-xO2 supported on mesoporous silica was synthesized for propane dehydrogenation. Wet impregnation method resulted in catalysts with higher activity and selectivity to propylene compared to simultaneous introduction of metals with Si-precursor hydrolysis. The catalytic activity decreased with varying chromium loading and CexZr1-xO2 composition. Rating: 8/10
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Materials Science, Ceramics
S. V. Kameneva, Kh. E. Yorov, R. K. Kamilov, S. Yu. Kottsov, M. A. Teplonogova, T. V. Khamova, M. A. Popkov, I. V. Tronev, A. E. Baranchikov, V. K. Ivanov
Summary: Aerogels containing rare earth elements are promising compounds for designing functional materials due to their combination of aerogel properties and the luminescent and catalytic properties of rare earth elements. A modified sol-gel method was developed to produce mixed rare earth oxide aerogels with high metal to metal ratio and individual aerogels. The aerogels obtained possess mesoporous structure and high surface area, and show strong luminescence in the visible region after calcination at high temperature.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Arina D. D. Filippova, Madina M. M. Sozarukova, Alexander E. E. Baranchikov, Sergey Yu. Kottsov, Kirill A. A. Cherednichenko, Vladimir K. K. Ivanov
Summary: The enzyme-like activity of metal oxide nanoparticles is influenced by factors such as size, shape, surface chemistry, and substrate affinity. The size effect of ceria nanoparticles, a prominent inorganic nanozyme, is still not well understood. This study investigated the peroxidase-like activity of CeO2 nanoparticles with different sizes in different buffer solutions, and found that the size of the nanoparticles had different effects on their activity depending on the buffer solution used. The possible reasons for these differences are discussed.
Article
Biotechnology & Applied Microbiology
Lyubov A. Ivanova, Vladimir V. Egorov, Yana A. Zabrodskaya, Aram A. Shaldzhyan, Alexander Ye. Baranchikov, Natalia V. Tsvigun, Anna N. Lykholay, Alexey D. Yapryntsev, Dmitry V. Lebedev, Anna A. Kulminskaya
Summary: In this study, the influence of medium components on CaCO3 precipitation and ECM composition induced by Bacillus cereus cells was analyzed. The accumulation of extracellular polysaccharides and amyloids was independent of calcium and urea, while the accumulation of eDNA and calcium carbonate precipitation required both ingredients. Removal of eDNA disrupted cell network formation and decreased the precipitate yield. The formation of CaCO3 minerals involved exopolysaccharides, negatively charged eDNA lattice, local Ca2+ supersaturation, and pH rise.
NPJ BIOFILMS AND MICROBIOMES
(2023)
Article
Nanoscience & Nanotechnology
Taisiya O. Kozlova, Anton L. Popov, Mikhail V. Romanov, Irina V. Savintseva, Darya N. Vasilyeva, Alexander E. Baranchikov, Vladimir K. Ivanov
Summary: Nanocrystalline cerium dioxide is a promising inorganic UV filter for sunscreen applications due to its high UV absorbance and non-toxicity to normal cells. Nanoscale CeO2 also showed selective cytotoxicity to cancer cells. Crystalline cerium(IV) phosphates can be a promising alternative for nanoscale CeO2 due to their low solubility, high redox stability and UV protective property. In this work, it was demonstrated for the first time that ceric phosphates have a comparable inhibitory impact on murine melanoma B16/F10 cell line to nanoscale CeO2 at high concentrations.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2023)
Article
Nanoscience & Nanotechnology
Taisiya O. Kozlova, Darya N. Vasilyeva, Daniil A. Kozlov, Mariia A. Teplonogova, Alexander E. Baranchikov, Nikolay P. Simonenko, Vladimir K. Ivanov
Summary: Hydrothermal treatment of nanoscale amorphous ceric phosphate gel in KOH aqueous solutions forms a new KCe2(PO4)3 phase. The structure of KCe2(PO4)3 is isostructural to (NH4)Ce2(PO4)3. The thermal decomposition of KCe2(PO4)3 at 800 degrees C results in a mixture of crystalline CePO4 and KPO3.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2023)
Article
Crystallography
Matin Ashurov, Yuchen Liu, Alexander Ezhov, Salah Ud Din, Alexander Baranchikov, Sergey Klimonsky
Summary: This study presents a simple and frugal method for fabricating inverse micropatterned photonic crystal films. By utilizing the stick-slip motion of meniscus and photopolymerization process, highly uniform inverse stripe patterned films with photonic crystal properties are obtained. The resulting structures can be used for sensing applications.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Optics
Yu. V. Orlovskii, E. A. Vagapova, V. Peet, E. Vinogradova, L. Dolgov, V. Boltrushko, V. Hizhnyakov
Summary: Pair centers of Nd3+ ions in doped crystals were studied under tunable narrow-linewidth laser excitation. It was found that the exchange of electronic excitation leads to the splitting of the one-exciton cooperative state, with a non-monotonic dependence on the distance between the ions in the pairs. This dependence is explained by the competition of dipole-dipole and quadrupole-quadrupole interactions with spin flip.
JOURNAL OF LUMINESCENCE
(2023)
Article
Physics, Multidisciplinary
G. O. Silaev, V. N. Krasheninnikov, A. T. Shaidulin, O. V. Uvarov, E. O. Orlovskaya, Yu. V. Orlovskii, Yu. G. Vainer
Summary: A comparative study was conducted on the sizes and spatial structure of single dielectric colloidal nanoparticles of lanthanum fluoride doped with rare-earth neodymium ions (Nd3+:LaF3) and their conglomerates in an aqueous solution. The nanoparticles were synthesized by aqueous co-precipitation method followed by hydrothermal microwave treatment. Three methods, namely transmission electron microscopy (TEM), nanoparticle tracking analysis (NTA), and dynamic light scattering (DLS), were used for the experiments. The analysis of the results revealed the formation of a stable colloidal solution consisting of narrow-sized (10-30 nm) single lanthanum fluoride nanoparticles and nanoclusters formed on their basis. It was also discovered that the spatial structure of nanoclusters cannot be described by the fractal model widely used for describing clusters formed in colloidal solutions of nanoparticles of various nature.
PHYSICS OF WAVE PHENOMENA
(2023)
Article
Chemistry, Inorganic & Nuclear
E. G. Il'in, A. S. Parshakov, L. D. Iskhakova, S. Yu. Kottsov, A. D. Filippova, L. V. Goeva, N. P. Simonenko, A. E. Baranchikov, V. K. Ivanov
Summary: The behavior of cerium tetrafluoride hydrate was studied under different temperatures. A new cerium fluoride compound was formed during the hydrothermal treatment at 100 degrees Celsius, while hydrolysis and reduction of cerium(IV) fluoride compounds occurred at temperatures above 130 degrees Celsius.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Analytical
Maria A. Teplonogova, Alexey D. Yapryntsev, Alexander E. Baranchikov, Vladimir K. Ivanov
Summary: In recent years, there has been increasing interest in stimuli-responsive host-guest materials for switchable devices. This study demonstrates the potential of using layered rare earth hydroxides as stimuli-responsive materials, with the cinnamate anion undergoing UV-assisted isomerisation.
Article
Horticulture
Mark O. Paskhin, Denis V. Yanykin, Alexander V. Popov, Roman V. Pobedonostsev, Dina V. Kazantseva, Alexey S. Dorokhov, Andrey Yu. Izmailov, Alexey A. Vyatchinov, Elena O. Orlovskaya, Artem T. Shaidulin, Yurii V. Orlovskii, Vladimir A. Vodeneev, Sergey V. Gudkov
Summary: The effect of light conversion using europium (Eu(III))-based photoconversion covers on the cultivation of agricultural plants and their resistance to stress conditions was investigated. Two types of europium nanoparticles were used: europium oxide (Eu2O3) and Eu3+:LaF3 nanocrystals. Tomatoes and cucumbers were used as model plants. It was found that plants grown under Eu2O3 cover had higher growth, yield, and faster activation of gas exchange and photosynthesis, while plants grown under Eu3+:LaF3 cover showed slower biomass accumulation and decreased gas exchange activation, but increased resistance to high and low temperatures.
Article
Physics, Condensed Matter
Matin Ashurov, Stella Kutrovskaya, Alexander Baranchikov, Sergey Klimonsky, Alexey Kavokin
Summary: The method developed utilizes the optical properties of ETPTA IPhCs to determine alcohol concentrations in water, with the position of the PSB as the analytical signal. Sensitivity was found to be sufficient for various applications in bio/chemical detection and environmental monitoring, especially for ethylene glycol-water mixtures.
Article
Biochemistry & Molecular Biology
Sergey Tkachenko, Maria Trukhina, Anastasia Ryabova, Maxim Oshchepkov, Semen Kamagurov, Konstantin Popov
Summary: Equipment scaling affects global industrial applications, leading to reduced production efficiency. Anti-scaling agents are commonly used, but the mechanisms of scale inhibition, especially the localization of scale inhibitors on deposits, are not well understood. This study focuses on the synthesis and investigation of a novel fluorescent antiscalant, ADMP-F, which effectively controls the precipitation of CaCO3 and CaSO4 in solution and provides valuable information on the interaction between scale inhibitors and deposits. ADMP-F was found to be more effective than other fluorescent antiscalants, suggesting its potential as a tracer for organophosphonate scale inhibitors.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(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)