CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Pengju Xia,Yifeng Lei,Wanyuan Li,Kaiting Wu,Chengyu Ni,Man Xu,Wubin Dai
With the growing public awareness of protecting vision and prevention of hazardous effects, there is much-needed research on a “healthy” full visible spectrum under near-ultraviolet (nUV) excitation in phosphor-converted white light-emitting diodes (pc-wLEDs) to fill the “cyan gap” and avoid employing a blue LED chip. Herein, a novel series of borosilicates Ba2CaB2Si4O14 (BCBS): Ce3+/Tb3+/Sm3+/Sr2+/Na+ phosphors, presenting color-tunable photoluminescence (PL), high quantum yield (QY), and thermal stability, were designed and synthesized via a facile solid-phase reaction. The Rietveld analyses, density functional theory (DFT) simulations, and theoretical calculations of bond energy together imply the site occupations of Ce/Tb/Sm on Ba2+/Ca2+ sites with a preferred location on Ca2+ over the Ba2+ site. The broad/bright cyan-PL from BCBS: Ce under nUV excitation is associated with the allowed f–d transitions of Ce3+ and dual-site occupancies. The forbidden f–f transitions of both the green-PL of Tb and the red-PL of Sm were insensitive to the site environment and helpful to PL color regulation. The cascading Ce → Tb → Sm energy transfer is confirmed, where Tb is regarded as an energy transfer (ET) bridge to avoid the metal–metal charge transfer (MMCT) effect. The introduction of Na+ as both flux and charge compensator is for the sake of decreasing defects from heterovalent substitutions and regulating morphology. Further incorporation of Sr2+ is to modulate the lattice environments of dopants for controlling the shift of PL. Finally, as a proof-of-concept implement, a pc-wLED assembled by BCBS: Ce/Tb/Sm/Sr/Na and an nUV LED chip via a remote “capping” packaging strategy show attractive performance.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chengyu Ni,Chunyu Li,Zihao Xu,Wubin Dai
(Co)doping luminescent center(s) in a host is a universal strategy to photoluminescence (PL) modulations for extensive applications, yet its mechanism and interactions between structure and behavior in many phosphors remain ambiguous. Herein, via a facile sol–gel reaction method, differently tendentious occupations of Ce3+ in distinct crystallographic sites of K3YSi2O7 (KYS) lead to tunable PL in between blue and bluish-green under diverse excitations with high quantum efficiency. The generation of wide trap energy levels originating from heterovalent substitution Tb3+ → K+ could entrust Tb3+ as both PL and long-persistent PL (LPL) centers in green. Due to temperature-dependent filling/releasing rates of captured carriers, strong thermal-induced LPL could be obtained in KYS: Tb. By codoping Ce/Tb in KYS, multimode anticounterfeiting and information storage/encryption of KYS: Ce/Tb are realized with high security level via a screen printing technique. Because Ce and Tb possess different temperature-dependent quenching behaviors, optical temperature sensing is achieved with high absolute/relative sensitivity. To further enhance the KYS: Ce/Tb performance, trap depth engineering via equivalent substitution Gd → Y is further executed. The colorimetric/photometric analyses here provide new insights into designing novel stable and single-phased phosphor for applications in advanced anticounterfeiting technology and optical thermometry.
研究领域:
材料科学
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发光材料
·
光学传感
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防伪技术
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信息存储
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固态化学
·
光子学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Junya Song,Beibei Zhao,Yiren Wang,Xinfang Liu,Zheng Cheng,Xiaoyu Zhang,Xun Feng
In this study, a new Tb-MOF fluorescence probe was developed for the detection of malachite green (MG) in real aquatic products. Fluorescence sensing experiments revealed that MG can effectively quench the green fluorescence of Tb-MOF suspensions, and the detection process exhibits the advantages of high sensitivity, a wide linear range (0–80 μM), a low detection limit (10.8 nM) and a rapid response time. Selective detection of MG is achieved primarily through fluorescence resonance energy transfer (FRET) and photoinduced electron transfer (PET) mechanisms. Furthermore, a smartphone-assisted Tb-MOF-based agar slice detection platform was constructed for the visual and quantitative detection of MG. Additionally, the on-site detection of MG in crucian and shrimp samples was accomplished with high recoveries (99.8 %-107.99 %) and low relative standard deviations (RSD < 2.2 %). This developed detection platform introduced a low-cost, portable and user-friendly approach for MG detection.
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Gen Li,Yaqi Wang,Min Tao,Siqi Chen,Bozhi Zhou,Quan Li,Xin Li,Heming Deng,Hao Huang,Haoshuang Gu,Yuebin Li
Developing efficient strategies to fabricate planar photoluminescence scintillators is of great importance to explore X-ray detectors with new platform. Rare-earth (RE) doped Lu 2 O 3 thin films are successfully fabricated by mild aqueous phase electrochemical deposition on ITO/glass substrates with low-temperature post-annealing treatment. The as-prepared Lu 2 O 3 :RE 3+ (RE = Eu, Tb and Tm) thin films exhibit steerable thickness, high transparency in the visible-NIR range, and low transmittance at UV band mainly due to the oxygen-metal (O 2- -RE 3+ ) charge transfer processes and the 4f-4f transitions of the RE 3+ . The Lu 2 O 3 :RE 3+ thin films emit intense red, green and blue (RGB) photoluminescence, which mainly correspond to the 5 D 0 - 7 F 2 transition of Eu 3+ , 5 D 4 - 7 F 5 transition of Tb 3+ and 1 G 4 - 3 H 6 transition of Tm 3+ respectively. Moreover, the transparent Lu 2 O 3 :RE 3+ thin films also exhibit high sensitivity and linearity luminescence to the X-ray stimulation in a dose rate from 30 to 160 mGy s −1 . This rapid and energy-saving synthesis show high efficiency to fabricate rare-earth doped thin-film with a tunable optical performance for optoelectrical application in the fields of solar light concentrators, agricultural light conversion thin films, biosensors , photodetectors and especially the X-ray detectors.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Chunning Heng,Xin Zhou,Xiaoyan Zheng,Meiying Liu,Yuanqing Wen,Hongye Huang,Daidi Fan,Junfeng Hui,Xiaoyong Zhang,Yen Wei
Rare-earth ions doped hydroxyapatite nanoparticles (HAp:Ln NPs) have demonstrated to be very promising candidates for biological imaging applications owing to their small size and chemical compositions similar to bone. However, these HAp:Ln NPs with controllable size and morphology should be prepared under hydrothermal treatment with hydrophobic molecules as the protective layers. The hydrophobic nature of these luminescent HAp:Ln NPs largely impeded their applications in biomedical fields. In this study, a novel and effective strategy has been developed for the surface modification of HAp:Ln nanorods through the combination of surface ligand exchange reaction and reversible-addition fragmentation chain transfer (RAFT) polymerization using 2-methacryloyloxyethyl phosphorylcholine (MPC) and itaconic acid (IA) as the monomers. Herein, a small molecule adenosine 5′-monophosphate disodium salt (AMP) that contains a phosphate group and two hydroxyl groups was used to displace the hydrophobic oleic acid on pristine HAp NPs through surface ligand exchange reaction owing to its stronger interaction with HAp NPs. On the other hand, the MPC and IA were introduced on HAp NPs through RAFT polymerization after the chain transfer agent was immobilized on the HAp NPs through the esterification reaction. The poly(IA-MPC) could not only endow the high water dispersibility but also be used for loading anticancer agent cisplatin (CDDP) through coordination interaction. To evaluate their potential biomedical applications, the cell uptake behavior, drug loading capacity and release behavior as well as cell viability of HAp:Ln-AMP-poly(IA-MPC) polymeric composites were examined. We demonstrated that the method developed in this work is very effective for introduction of functional polymers onto HAp:Ln nanorods. The HAp:Ln-AMP-poly(IA-MPC) composites are promising for cell imaging and controlled delivery of CDDP.
研究领域:
材料科学
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生物医学工程
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纳米医学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 9
·1653-1660
·
IF 3.741
Ge Xiaoqian,Sun Lining,Dang Song,Liu Jinliang,Xu Yanxia,Wei Zuwu,Shi Liyi,Zhang Hongjie
A new multifunctional nanocomposite is described that displays both upconversion and downconversion luminescence. It is based on upconversion nanoparticles (UCNPs) with a mesoporous coating that is boned with a terbium(III) complex. The modified mesoporous nanocomposite was characterized by transmission electron microscopy, X-ray powder diffraction, nitrogen adsorption-desorption isotherms, and photoluminescence spectra. They display dual (green and red) fluorescence under 980-nm excitation, and green fluorescence under 365-nm excitation. Both emissions can be easily detected by bare eyes. The material has low cytotoxicity and good biocompatibility as proven by the methyl thiazolyltetrazolium (MTT) assay. The nanocomposite was successfully applied to upconversion luminescence based in-vitro confocal imaging of the cytosol of murine macrophage cells (RAW264.7), and this resulted in images of excellent contrast. In addition, the particles display strongly temperature-dependent luminescence in the range from 280 K to 330 K.
A new multifunctional nanocomposite was designed and prepared with dual green luminescence based on the upconversion and downconversion emission for in vitro bioimaging and temperature sensing
研究领域:
材料科学
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生物医学工程
·
分析化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Wei Huang,Junzhe Xu,Dingkun Lu,Jingjing Deng,Guoyue Shi,Tianshu Zhou
In this study, novel magnetic infinite coordination polymer Fe 3 O 4 @Tb/AMP core-shell nanoparticles were rationally designed and fabricated as recyclable adsorbents for selective removal of anionic dyes from colored wastewater. The core-shell nanoparticles used in this study are composed of two components: the shell is the supramolecular infinite coordination polymers (ICPs) network formed by terbium ions (Tb 3+ ) and adenosine 5 ′ -monophosphate monohydrate (AMP) ligands and the core is the Fe 3 O 4 nanoparticles which are encapsulated into the ICP network by the self-adaptive inclusion process. The prepared core-shell nanoparticles showed superiority in strong magnetism and selective adsorption towards anionic dyes, such as Alizarin Red (AR) and Congo Red (CR). Parameters that influenced the adsorption process, such as solution pH, salt concentration and adsorbent dosage were investigated. Under the optimal conditions, adsorption kinetics, isotherms and thermodynamics were also determined. Notably, this nano-adsorbent exhibited rapid adsorption feature (almost 96% dye removal in 5 min) and the adsorption isotherm data fitted quite well with the Langmuir model with an estimated maximum adsorption capacity of 357.14 mg g −1 for AR and 909.09 mg g −1 for CR at 298 K. This capacity could be further enhanced at the higher temperatures. In addition, the Fe 3 O 4 @Tb/AMP core-shell nanoparticles could be regenerated by a simple salt/ethanol-washing method and used with high recyclability over five cycles. With the magnetically separable Fe 3 O 4 @Tb/AMP core-shell nanoparticles as adsorbents, selective removal of toxic anionic dyes from colored wastewater could be realized directly, which is of great importance for the sustainable development of dye contaminated wastewater treatment technology.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 20
·6667
·
IF 3.4
Yukun Li,Svenja Hanson,Cheng Heng Pang,Peng Lyu,Jun Jiang
In order to attain phosphor ceramics with a high Color-Rendering Index (CRI), samples with the composition of Y0.997−xRexCe0.003)3(Al0.9748Mn2+0.024Cr3+0.0012)5O12(Rex= 0, Gd0.333, Gd0.666, Gd0.997, Tb0.333, Tb0.666, Tb0.997and Lu0.997were prepared by solid-state reaction and vacuum sintering, and exhibited potential for high-quality, solid-state lighting. Doping with Cr3+and Mn2+effectively enhanced the red component of Ce3+spectra through the intense energy transfer from Ce3+ions to Mn2+/Cr3+ions. The crystal field splitting of [GdO8] and [TbO8] was more extensive than that of [YO8], causing a massive redshift in the Ce3+emission peaks from 542 to 561 and 595 nm, while [LuO8] had an opposite effect and caused a blueshift with a peak position at 512 nm. White LED devices incorporating Ce/Mn/Cr: (Gd0.333Y0.664)3Al5O12phosphor ceramic exhibited a high CRI of 83.97, highlighting the potential for enhancing the red-light component of white LED lighting.Keywords:garnet phosphor;laser lighting;full spectrum;spectral modulation;Ce/Mn/Cr: (Re,Y)3Al5O12
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tianshuai Lyu,Pieter Dorenbos,Zhanhua Wei
Developing X-ray charged dosimeters with excellent charge carrier storage capacity and stability is challenging. Such energy storage dosimeters have fascinating use in developing novel applications, for instance, in radiation detection, advanced multimode anti-counterfeiting, and flexible X-ray imaging of curved objects. Herein, novel LiTaO 3 :Ln 3+ ,Eu 3+ (Ln = Tb or Pr) perovskite dosimeters are reported by combining the vacuum referred binding energy (VRBE) diagram of LiTaO 3 and the optimization of dopant’s concentration and compound synthesis condition. Based on the VRBE diagram prediction, charge carrier capturing and de-trapping processes in Eu 3+ and/or Ln 3+ (Ln = Tb or Pr) doped LiTaO 3 will be studied to unravel the role of Eu 3+ as a good electron trapping centre and to discover a record storage phosphor. The ratios of the thermoluminescence intensity of the optimized LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ to that of the state-of-the-art BaFBr(I):Eu 2+ , Al 2 O 3 :C, or NaLuF 4 :Tb 3+ are 5.2, 8.8, or 2.8, respectively. The charge carriers can be stored more than 1000 h in LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept anti-counterfeiting application will be demonstrated by combining the colour-tailorable photoluminescence, afterglow, thermally, or optically stimulated luminescence in LiTaO 3 :0.005Tb 3+ ,xEu 3+ and LiTaO 3 :0.005Pr 3+ ,0.001Eu 3+ . Multimode anti-counterfeiting application will be proposed by combining a high absolute X-ray scintillation light yield of 19000 ± 1800 ph/MeV of LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept flexible X-ray imaging application will be demonstrated by using the optimized LiTaO 3 :0.005Tb 3+ , 0.001Eu 3+ dispersed in a silicone gel film.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Chengxiang Chu,Xianfeng Wang,Yuanyi Deng,Yi Ma,Chengyue Zou,Mei Yang,Huibo Luo,Danqun Huo,Changjun Hou
A facile and rapid fluorescence sensor array based on Tb (III) and Eu (III) doped Zr (IV) metal–organic frameworks was proposed for Chinese green tea discrimination. According to large porosity of Tb@UiO-66-(COOH) 2 and Eu@UiO-66-(COOH) 2 , phenolic hydroxyl groups of tea polyphenols could coordinate with free carboxylic acid groups and was captured into the pores, which led to the disturbance of electronic structure of ligand and inhibited the energy transfer efficiency from ligand to Tb (III) and Eu (III) center, causing the fluorescence quenching effect. Based on Hierarchy Cluster Analysis and Linear Discrimination Analysis, the fluorescence sensor array was employed for successful tea polyphenols classification through the analysis of different fluorescence quenching effect to tea polyphenols. Green tea samples within different categories and grades were also successfully discriminated using this assay according to tea polyphenols, providing a new method for Chinese green tea identification.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jinrong Gao,He Bai,Xiao Ling,Yunjiang Yang,Xinru Liu,Zhipeng Fan,Jinrong Bao,Wenxian Li,Ying Liu,Xiaowei Zhu
A rare earth organic complex, SiO 2 @ATPA-Si-RE (RE = Eu, Tb), exhibiting a core-shell structure, was synthesized using the ligand (HOOC) 2 C 6 H 3 NHCONH(CH 2 ) 3 Si(OCH 2 CH 3 ) 3 (ATPA-Si) to connect the silica microspheres core and coordinate with rare earth ions. The pH value of the reaction was adjusted to produce organic complex shells with thicknesses of 2.0 nm and 5.0 nm, while the SiO 2 core measured a diameter of 125 nm. Luminescence spectra indicated that the emission intensity of the SiO 2 @ATPA-Si-RE (RE = Eu, Tb) core-shell structure was stronger than that of the ATPA-Si-RE organic complex due to a perfect match between the triplet energy level of SiO 2 @ATPA-Si and the excited energy level of rare earth ions (Eu 3+ , Tb 3+ ). Remarkably, the core-shell structure with a 2.0 nm shell thickness possessed a greater emission intensity compared to the 5.0 nm shell thickness. Moreover, these findings unveiled the tunability of luminescence color, ranging from green or red to white, by adjusting the doping ratio of Eu 3+ and Tb 3+ ions and the coating thickness of complexes. Particularly, a warm white light emission, characterized by CIE coordinates (0.389, 0.347), a color rendering index value of 86.7, and a low correlated color temperature value of 3550 K, was achieved using the organic complex with a 2.0 nm thickness coated on SiO 2 microspheres with a doping ratio of Eu 3+ at 0.7 mmol and Tb 3+ at 0.3 mmol. Conversely, the complexes with a 5.0 nm coating thickness and Tb 3+ doping ratio of 0.3 mmol yielded a cold white light emission. These findings demonstrate the potential applications in next-generation lighting industry and display systems.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Binbin Zhang,Qilin Zhong,Yuhang Xie,Linfeng Hu,Yujie Wang,Guangyue Bai
Many lanthanide complexes do not form gel or even exhibit characteristic luminescence of lanthanide ions, which limits their applications in many fields. Therefore, there is an urgent need for a third component that can not only promote emission but also gel the lanthanide complex system to construct new smart materials such as time-dependent information encryption and anti-counterfeiting materials. Herein, a luminescent lanthanide metallogel was successfully prepared by using the third component sodium carboxymethyl cellulose (NaCMC) to induce the gelation and luminescence of the complex (H 3 L/Tb 3+ ) of 4,4′,4″-((benzene-1,3,5-tricarbonyl)tris(azanediyl)) tris(2-hydroxybenzoic acid) (H 3 L) and Tb 3+ . The H 3 L/Tb 3+ complex itself does not form gel and has no characteristic luminescence of Tb 3+ . Moreover, the multicolor emission of H 3 L/Tb 3+ /NaCMC gels was prepared based on Förster resonance energy transfer (FRET) platforms to obtain a high-security level information encryption and anti-counterfeiting materials. These multicolor emission gels exhibit emission color tunability with time dependence due to the different energy transfer efficiencies at each pH node controlled by glucono-δ-lactone hydrolysis time. Based on the time response characteristics, the time-dependent information encryption and anti-counterfeiting materials are developed.
研究领域:
材料科学
·
化学
·
光学
·
安全材料
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）