CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Meiting Li,Bingxin Yuan,Xiangyang Zheng,Bo Chen,Chi Zhang,Xuejiao Wang,Ji-Guang Li
A series of LaNbO 4 :RE 3+ (RE = Tb and Eu) phosphors were successfully synthesized via a calcination-assisted hydrothermal reaction, where the vital roles of solution pH, calcination temperature and NbO 4 3− /La 3+ molar ratio in phase/morphology evolution of LaNbO 4 nanocrystals were elaborated. It was unambiguously demonstrated that monoclinic LaNbO 4 can be crystallized at solution pH = 8–13 after calcination at 900 °C. With pH = 10 precursor for example, higher calcination temperature led to phase transformation from orthorhombic to monoclinic structure. LaNbO 4 nanoparticles exhibit self-activated broad-band excitations ( 1 A 1 → 1 T 1,2 ) and emissions ( 3 T 2,1 → 1 A 1 ) within the NbO 4 3− ligand. Intriguingly, Tb 3+ /Eu 3+ incorporations allow for phase tailoring and full-visible-spectrum color-tunable luminescence, where the latter benefits from the effective NbO 4 3− → Tb 3+ → Eu 3+ energy transfer. LaNbO 4 :0.01 Tb 3+ ,0.01Eu 3+ phosphor exhibits stronger white-light emission, which gradually drifts to yellowish green at high heating temperature. This phosphor is an attractive candidate for optical thermometers and warm pc-WLED owning to excellent thermal stability, a low correlated color temperature of ∼5694 K and a high color rendering index of ∼90.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liwei Wu,Jiawen Fan,Hengxi Yao,Tong Wei,Jia Li,Jiawei Yan,Tianyi Wang,Canlin Zhou,Yingdong Han,Linyang Li,Dong Tu,Dongling Geng
Photoluminescence (PL) and mechanoluminescence (ML), serving as core mechanisms of emerging intelligent luminescent materials, hold momentous promise for applications in information security, display technologies, and self-powered sensing. However, conventional intelligent luminescent materials face critical limitations, including the difficulty in constructing multiplexing systems, dependence on ultraviolet (UV) pre-irradiation, and constraints of monochromatic emission. To address these limitations, a series of Er 3+ mediated piezoelectric Ca 3 Ga 4 O 9 :Eu 3+ samples is designed and developed, establishing a four-wavelength-excitation optical multiplexing platform, where each excitation source selectively activated distinct lanthanide energy transfer pathways while enabling tricolor PL tuning from orange-red to yellow to green. Simultaneously, intriguing ML is also achieved, featuring non-pre-irradiation and multicolor (continuous red-to-green emission) tunability characteristics. More importantly, combining systematic experimental investigations and density functional theory calculations, the underlying mechanism of the ML has been elucidated as the synergistic contribution of triboelectric and piezoelectric effects. The developed Ca 3 Ga 4 O 9 :Eu 3+ embellished by Er 3+ displayed intriguing potential application in grayscale analysis anti-counterfeiting films, and self-powered cipher lock system.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zhengxing Song,Jing Wang,Jing Wang,Jin Liu,Xinzhi Wang,Yao Wang,Abdur Raheem Aleem,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Nanoparticle drug delivery systems are designed to be biocompatible and to control the distribution of poorly soluble drugs. Fluorescent nanoparticle drug carriers have been designed to enable fluorescence tracking. While such particles enable tracking of the carrier, this tracking does not report the local drug concentration. In this article, we report new nanoparticle drug carriers with stable, high-intensity fluorescence that sensitively reports the loaded drug concentration. The dumbbell-shaped nanoparticles are synthesized by combining europium (Eu) complexes with hyaluronic acid. The Eu complexes are superior to organic fluorophores, providing a narrow emission peak, high fluorescence intensity, long fluorescence lifetime, and insensitivity to photobleaching. The hyaluronic acid compatibilizes the nanoparticles with aqueous environments, and provides biocompatibility. We demonstrate that these polysaccharide nano-dumbbell aggregates (PNDAs) can effectively load drugs through structural changes, and sense the amount of drug loaded through changes in fluorescence intensity, enabling precise tracking of drug loading and release.
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高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
·
2023
·Vol. 78
·期 10
·921-926
·
IF 1.8
Cong Liu,Junshen Xing,Zheng Liu,Wenlin Feng
BaSr 2 (PO 4 ) 2 : 4 %Eu 3+ , 4 % A ( A = Li + , Na + , K + ) phosphors were prepared by high-temperature solid-phase method. The crystal structure, photoluminescence properties, thermal stability, chromaticity coordinates, and fluorescence lifetime of the samples were investigated. The excitation and emission spectra of the samples are broadbands and the maximum peak of the emission spectrum is located at 619 nm. Among three charge compensators, the luminescence intensity is optimal for Li + co-doping case, and the quenching temperature of the typical sample is about 500 K. the fluorescence lifetime
τ
is 1469.6 ns, and the chromaticity coordinates exhibit a strong red emission. The present phosphor has a potential application for white light-emitting diodes (LEDs) under the near-ultra violet (n-UV) light excitation.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·2040
·
IF 5.719
Ziyao Hu,Dong Zhao,Yao Wang,Linjun Huang,Shichao Wang,Sui Mao,Olga Grigoryeva,Peter Strizhak,Alexander Fainleib,Jianguo Tang
In the blending process of the composites, the clustering of MWCNTs under high concentration leads to poor dispersion and difficult complexing with luminescent elements. Cyanate ester resins (CERs) have a brittle network structure when cured caused by a conjugation effect that forms a strong emission peak in the ultraviolet-visible region and quenches the luminescent elements of the fluorescent nanofillers. In this paper, by anchoring of the Eu complex (Eu(TTA)3Phen, ETP) on a surface of longitudinal split unzipped carbon nanotubes (uMWCNTs); fluorescent nanoparticles were prepared as ETP anchor unzipper carbon nanotubes (ETP-uCNTs). Dicyanate ester of bisphenol E (CER-E monomer) is cured to polycyanurate at a lower temperature to achieve a high conversion, promoting a uniform blend with ETP-uCNTs, providing the fluorescence environment with high color purity. Studies show the ETP-uCNTs solve the agglomeration of MWCNTs and improve the interface binding ability. Compared with the pure CER-E, the tensile strength, bending strength and impact strength of CER-E/0.8 wt.% ETP-uCNT hybrid nanocomposites are increased by 94.6%, 92.8% and 101.1%, respectively. The carbon residue rate of CER-E/ETP-uCNTs is up to 47.14% at 800 °C, the temperature of the maximum reaction rate decreases by 67.81 °C, and the partial absorption of ultraviolet light is realized between 200 and 400 nm.Keywords:cyanate ester resin;carbon nanotubes;Eu complex;mechanical properties;fluorescence
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PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 29
·期 6
·2124-2132
·
IF 1.637
Wang Zirui,Wang Xinyu,Li Jingfang,Li Weizuo,Li Guangming
In this work, a facile and fast luminescence sensing platform for the ratiometric detection of hydrogen sulfide (H 2 S/HS − ) has been constructed by encapsulating the Eu 3+ /β-diketone chromophore into the host framework of MIL-140 (Eu 3+ /TFA@MIL-140C, TFA = 1,1,1-Trifluoro-2,4-pentanedione). It is well known that the energy transfer from the host framework or/and TFA to the Eu 3+ ions can be disturbed easily by some metal ions, such as Cu 2+ ions. Therefore, the ratiometric sensor was constituted with the Eu 3+ /β-diketone moiety as the response signal and the host framework moiety as the reference signal. Furthermore, on the basis of the hard–soft acid–base theory, the Cu 2+ ions could be rapidly caught by HS − , profiting from the low solubility of CuS, realizing the real-time detection by luminescence color change. This sensor shows remarkable property on the detection of H 2 S (HS − in water solution) with low limit of detection (LOD = 7.43 μM) and short response time (< 0.5 min). The good linearity between luminescent intensity and concentration makes the luminescent ratio meter feasible.
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高影响因子
Optical Materials Express
·
2021
·Vol. 11
·期 2
·355-370
·
IF 3.442
Dongxun Chen,Shihai Miao,Yanjie Liang,Yanjie Liang,Yanjie Liang,Weili Wang,Shao Yan,Jianqiang Bi,Jianqiang Bi,Kangning Sun
Core-shell Bi2SiO5 nanosystem with uniform morphology and narrow size distribution has been successfully synthesized via a facile template-assisted route. With the introduction of Eu3+, detailed studies are performed to evaluate its promise as Eu3+-based phosphor host. The yielded Bi2SiO5:Eu3+ nanospheres are proven to be pure tetragonal phase via X-ray diffraction and Rietveld refinement. Moreover, the phosphor particles consist of monodisperse spheres with an average diameter of approximately 285 nm by high-resolution electron microscopy. When excited by near-ultraviolet (NUV) light, the abnormally high-intensity emission at 703 nm arising from the 5D0→7F4 transition of Eu3+ is observed. The temperature-dependent photoluminescence spectra show that the optimized Bi2SiO5:20%Eu3+ have satisfactory thermal stability with 63.7% of emission intensity at 423 K relative to 303 K. The deep-red light-emitting diode (LED) device fabricated by coating NUV chip with the Bi2SiO5:20%Eu3+ phosphors is demonstrated. The newly-developed Bi2SiO5:Eu3+ nanophosphors display commendable photoluminescence properties, demonstrating their promise as deep-red phosphor candidates for use in phosphor-converted LEDs.
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高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Xin Liu,Yinsheng Xu,Qianqian Liu,Wenjun Zhang
Metal–organic frameworks (MOFs) are a platform with multiple luminescent centers resulting from the multifaceted nature of their structure. Herein, via a facile postsynthetic modification method applied to the MOF (1,4-dicarboxybenzene, 2,6-pyridinedicarboxylic acid, and zirconium chloride were used as the linkers and metal precursor), the lanthanide-functionalized hybrid nanomaterial Eu3+/MOF(xHQ) (HQ = 8-hydroxyquinoline) is prepared. Luminescence of the Eu3+/MOF(xHQ) nanomaterial was investigated at the excitation wavelength of 308–365 nm, where there are two kinds of luminescence, that is, the MOF(xHQ) emission and the Eu3+ emission. After studying the luminescence of the MOF(xHQ), the luminescence mechanism, that is, the preferential absorption enhancement (PAE) mechanism, was proposed, to reveal the PAE of the MOF over HQ. Notably, the Eu3+/MOF(xHQ) achieves multicolor emissions by changing the excitation wavelength that shows great potential applications in the field of white light materials and anticounterfeiting. Moreover, the PAE mechanism makes the existing MOF more extensive and opens the strategy to the reasonable design of dimming aspects for this type of MOF materials.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ping Chen,Nengli Dai
Detection of Fe 3+ ions is of paramount importance for environmental protection and human health. Herein, we reported a highly selective and sensitive fluorescence probe for the quantification of Fe 3+ ions in aqueous solution with Eu 3+ /SnO 2 nanocrystals co-doped silica glasses as the sensing unit. Due to the high stability of silica glasses and their efficient protection for emitting centers, the probe has good recyclability and can be applied in real water environment, indicating its potential for on-site sensing. The detection limit of Fe 3+ ions is 7.54 nmol/L. Experiments were carried out to verify that the probe shows excellent cross interference with other metal ions. The detecting mechanism can be ascribed to the excitation/emission absorption and energy transfer of Fe 3+ ions. Our work paves a novel way of semiconductor oxide nanocrystals for applications in optoelectronics .
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 31
·10005-10012
·
IF 7.393
Lili Li,Xiaoshuang Yu,Abdur Raheem Aleem,Xiaolin Zhang,Yue Zhao,Xinzhi Wang,Yanying Zhang,Yao Wang,Wenfei Shen,Olle Inganäs,Jianguo Tang
In this article, a natural biological porous material, from living diatoms, is used to prepare new UV-protection hybrid materials with an Eu3+-complex. By removing the organic protoplasm of living diatoms, the exoskeleton with a regular pore structure arrangement was obtained. The Eu3+-complex was chemically bonded to the exoskeleton modified by the silane coupling agent (3-aminopropyl)trimethoxy silane (APTMS). Compared with pure Eu3+-complexes, the fluorescence intensity of this hybrid material was increased by approximately 10 times. For illustrating its applications in the field of UV-protection, we mixed the USDU with polyacrylonitrile to produce flexible and transparent polymer films. The hybrid composite film (USDU@PAN) achieved partial absorption of ultraviolet light between 200 and 400 nm. At the same time, it also emits visible fluorescence and the intensity of the fluorescence is greatly increased. Therefore, the USDU@PAN film has wide application prospects in areas such as photoelectric sensors and UV-protection devices. More importantly, we transform natural organisms into materials with excellent optical properties. Therefore, it can be used in the field of UV-protection.
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高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Zhongjie Cheng,Yulin Niu,Yanliang Yue,Wenfei Shen,Zhonglin Du,Yanxin Wang,Yao Wang,Jun Li,Chris D. Snow,Matt J. Kipper,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Luminescent complexes containing rare-earth metal ion centers can impart enhanced properties and new functions to engineered materials. In this work, Eu 3+ -induced polystyrene- b -poly(acrylic acid) nanoaggregates (EIPAs) are blended into polyethylene terephthalate (PET) at 0.25 to 4 wt%. PET is an easily processed and cost-effective flexible polymeric material with good mechanical properties, optical transparency, and thermal stability. The resulting EIPAs-doped PET (EIPAs@PET) blends exhibit excellent luminescence compared to other Eu 3+ complexes, and a long luminescent lifetime (up to 782 μs). Furthermore, the EIPAs induce nucleation of PET in EIPAs@PET. Furthermore, the EIPAs induce nucleation of PET. The crystallization temperature increased by 16.2 °C (from 186.7 to 202.9 °C), the melting enthalpy (ΔHm) increased from 31.8 J/g to 45.1 J/g, and the relative crystallinity rose from 26.4 % to 37.6 %.This enhanced crystallinity of EIPAs@PET results in an increased tensile modulus (from 61.27 MPa to 81.19 MPa) and elongation at break (from 158.93 % to 236.29 %), which shows that both intensity and flexibility were highly improved. It is notable that EIPAs can effectively generate the excellent luminescence property and highly enhance the mechanical property to PET. This work presents a strategic approach to the development of high-performance polyester composites with integrated structural and fluorescent properties.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jialin Cui,Shikun Su,Ruimao Li,Hui Xu,Wenhua Yang,Lizhen Zhao,Wei Qin,Bing Teng,Chen Hu,Shijia Sun,Wei Wang,Haiyang Zhang,Degao Zhong
This study successfully synthesized a melilite-structured multifunctional phosphor, CaLaAl 3 O 7 : Eu 2+ , Eu 3+ , through solid-state reaction under reducing atmosphere. The phosphor demonstrates dual-band emission with contrasting temperature-dependent luminescence behaviors: the blue emission (Eu 2+ , 443 nm) exhibits a sharp intensity decline with rising temperature, whereas the red emission (Eu 3+ , 616 nm) shows only a slight decrease in intensity under the same conditions. This unique property enables high-sensitivity fluorescence thermometry, achieving a maximum relative thermometric sensitivity (S r ) of 2.59 % K −1 at 303 K. Moreover, by utilizing the significant luminescence color changes induced by temperature variations, we have achieved wide-gamut visualization of surface temperature distributions on objects. Under 365 nm UV excitation, the phosphor demonstrates persistent blue luminescence lasting 180 s due to defect energy levels. By integrating multi-wavelength selective excitation, long afterglow, wide color gamut emission, and high sensitivity temperature response, CaLaAl 3 O 7 : Eu 2+ , Eu 3+ demonstrates promising applications in visual temperature detection and information encryption/anti-counterfeiting.
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高影响因子
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