LUMINESCENCE
·
2017
·Vol. 33
·期 1
·138-144
·
IF 1.509
Liping Zhang,Jianguo Zhang,Hongqi Chen,Lun Wang
An redox luminescence switch was developed for the sensing of glutathione (GSH), l -cysteine (Cys) or l -ascorbic acid (AA) based on redox reaction. The Mn 2+ -doped NaYF 4 :Yb,Er upconversion nanorods (UCNRs) with an emission peak located in the red region were synthesized. The luminescence intensity of the UCNRs could be quenched due to the Mn 2+ could be oxidized to MnO 2 by KMnO 4 . Subsequently, when the AA, GSH or Cys was added into the MnO 2 modified upconversion nanosystem, which could reduced MnO 2 to Mn 2+ and the luminescence intensity was recovered. The concentration ranges of the nanosystem are 0.500–3.375 mM (R 2 = 0.99) for AA, 0.6250–11.88 mM (R 2 = 0.99) for GSH and 0.6250–9.375 mM (R 2 = 0.99) for Cys, respectively.
研究领域:
分析化学
·
纳米技术
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 9
·1-9
·
IF 2.983
Han Zhanwen,Yu Hongquan,Tian Zhuang,Zhang Jinsu,Sun Jiashi,Li Xiangping,Xu Sai,Chen Baojiu
The lanthanide-based white light-emitting diodes excited by irradiation at a wavelength of 980 nm have attracted increasing attention because of their low photon frequency and ease of implementation. Here, we report on warm, white, Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes prepared by a simple single-needle electrospinning method. The Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes have an outer diameter of about 180 nm, and a wall thickness of 36 nm. Their color coordinates and chromaticity were controlled to yellow → red → warm white by adjusting the Tm 3+ concentration from 0.5 to 2.0%. The luminescence properties and upconversion mechanism of Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes were investigated. The warm white Y 2 Ti 2 O 7 :Tm/Yb/Er nanotubes exhibit a strong correlated color temperature to a household incandescent lamp.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 37
·期 1
·14
·
IF 2.8
Li Yonghang,Su Fuyan,Cai Qingfeng,Guo Hui,Chai Xiaona,Zou Hua
Yb and Re (Re = Er, Ho) codoped Sr₂ScSbO₆ double perovskite phosphors were synthesized via high-temperature solid-state reaction. Under excitation by a 980 nm laser, the Yb 3 ⁺/Er 3 ⁺ codoped sample exhibits weak green emissions at 522 and 558 nm, along with a dominant red emission at 660 nm, which is attributed to efficient cross-relaxation processes that enhance population of the 4 F 9/2 level. Notably, the emission intensities are temperature-dependent, resulting in distinct and visible changes in emission color with increasing temperature. Temperature sensing based on the fluorescence intensity ratio (FIR) demonstrates a maximum relative sensitivity of 0.73% K⁻ 1 at 490 K and an absolute sensitivity of 1.43% K⁻ 1 at 730 K. In contrast, the Yb 3 ⁺/Ho 3 ⁺ codoped sample exhibits dual green (543 nm) and red (661 nm) emissions, along with superior performance in high temperatures, achieving a relative sensitivity of 0.59%·K⁻ 1 and an absolute sensitivity of 0.42%·K⁻ 1 at 670 K. These results suggest that the Yb 3 ⁺/Er 3 ⁺ system is more suitable for low-to-intermediate temperature sensing, while the Yb 3 ⁺/Ho 3 ⁺ system is better suited for high-temperature optical thermometry applications.
研究领域:
材料科学
·
无机化学
·
功能材料
·
光学材料
·
传感器技术
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Sihan Wang,Xiaojun Guo,Xiadiyan Refuhati,Yanzhen Xiao,Lei Yan,Zhengkun Fu,Zhenglong Zhang
Upconversion luminescent materials have broad application prospects in lighting, display, and laser technology. However, single-phase systems are constrained by performance bottlenecks, making it difficult to simultaneously achieve high temperature sensitivity and tunable luminescence. To address this challenge, (Yb x Er 1-x ) 2 SiO 5 /SiO 2 multiphase composite phosphors are synthesized using a low-temperature (300 °C) hydrothermal method. Under 976 nm excitation, the material exhibits concentration-dependent luminescence: as the Yb fraction increases, the red emission at 660 nm continuously enhances, while the green emission shows initial enhancement followed by suppression. This behavior is attributed to an energy back-transfer mechanism between Yb 3+ and Er 3+ ions. Regarding temperature sensing, a highly repeatable thermal response is observed through the fluorescence intensity ratio of Er 3+ levels. Specifically, the thermally coupled levels show a relative sensitivity of 1.91% K −1 , while the non-thermally coupled levels exhibit an absolute sensitivity of 0.1063 K −1 . Furthermore, precise adjustment of Yb 3+ content, excitation power, or temperature enables continuous color tuning from green to red. This work simultaneously realizes high-precision temperature sensing and dynamic luminescence color control in upconversion materials, providing novel design concepts and practical pathways for developing multifunctional optical materials.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2013
·
IF 0.769
Yu-Rong TANG,Yu ZHANG,Rui LIU,Ying-Ying SU,Yi LÜ
The poly(acrylic acid) functionalized NaYF 4 :Yb,Er nanoparticles (NPs) were found to possess intrinsic peroxidase-like activity, which could catalyze oxidization of 3,3′,5,5′-tetramethylbiphenyl (TMB) by H 2 O 2 to produce a color variation. Using TMB as substrate, we systematically studied the effect of a series of conditions, such as temperature and pH, on the catalytic activity of NaYF 4 :Yb,Er NPs. When combined with uricase, the proposed colorimetric method could be successfully used for the determination of uric acid. Under the optimum conditions, the linear range of this method was from 1.0 × 10 −5 M to 2.0 × 10 −4 M with the detection limit down to 5.3 × 10 −6 M. Moreover, the developed method was applied to detect uric acid in serum samples and the results were in good agreement with those reported by the hospital.
研究领域:
生物化学
·
医学诊断
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2013
·
IF 2.144
Suli Wu,Yanhui Ning,Jie Chang,Shufen Zhang
Here, hydro/solvent thermal method was applied to synthesize lanthanide doped NaYF 4 upconversion nanoparticles (UCNPs). In order to overcome the quenching effect of (CH 2 ) n due to their high energy stretching vibration , a series of new chelating ligands such as, butanoic acid , hexanoic acid , decanoic acid , and tetradecanoic acid were selected for hydrothermal synthesis of NaYF 4 :Yb, Er nanocrystals . For comparison, commonly used oleic acid was also used as ligand for hydrothermal synthesis of UCNPs. The effect of the carbon chain length of chelating ligands on the NaYF 4 nanocrystals’ emission intensity was systematically investigated. It was found that relative short length of the carbon chain in chelating ligands resulted in enhancement of luminescent intensity and modulation of the ratios of green to red (RGR) of NaYF 4 :Yb, Er nanocrystals. In contrast to the product prepared with oleic acid as ligand, the enhancement factors of 540 nm emissions were 25, 21, 6.5, and 3 for samples prepared with butanoic acid, hexanoic acid, decanoic acid, and tetradecanoic acid as ligands, respectively. The FT-IR spectra of NaYF 4 :Yb, Er UCNPs prepared with different ligands indicated that ligands with relatively short chain length indeed have weak IR absorption in 2800–2950 cm −1 , which resulted in weak quenching effect of Er 3+ . We also synthesized NaYF 4 :Yb, Tm UCNPs with these ligands. The results showed that chain length of ligands has similar effect on emission intensity of NaYF 4 :Yb, Tm. It is expected that this method can also be applied to enhance the luminescence intensity of other luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2022
·Vol. 57
·期 4
·2100162
·
IF 1.599
Yanli Ding,Zhaohan Li
The low luminous efficiency of upconversion materials limits their practical applications in various fields. The present study focuses on the efficient upconversion enhancement of β-NaYF 4 :Yb,Er induced by Bi 3+ doping. The XRD and SEM results show that introducing Bi 3+ into the matrix lattice changes the microstructure and particle size of the crystal. The photoluminescence spectra show that at 6% Bi 3+ doping, the red and green emission intensities are enhanced by 12 and 8 times, respectively. The reason could be the lattice distortion caused by Bi 3+ doping, breaking the partial forbidden transition of rare-earth ions. The fluorescence lifetime measurement reveals that the Bi 3+ doping changes the environment around erbium ions, affecting the energy level lifetime of erbium ions, explaining the luminescence dynamics law. The present study provides a facile route to achieve nano/microstructures with intense upconversion luminescence with potential applications in optoelectronic devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Han Xia,Lei Lei,Jienan Xia,Youjie Hua,Degang Deng,Shiqing Xu
Non-contact optical thermometry based on fluorescence intensity ratio (FIR) technique has been widely researched over the past few decades. However, the reported systems exhibit two important shortcomings including the existence of a few interferential signals in addition to the required spectral bands for FIR and the absence of internal standard for reference signal. Herein, only two emission bands of Er 3+ : 4 F 9/2 → 4 I 15/2 (~673 nm) and Tm 3+ : 3 H 4 → 3 H 6 (~800 nm) are achieved in Yb/Er/Tm tri-doped Na 3 ZrF 7 nano-system. Moreover, the upconversion (UC) emission intensity of Er 3+ keeps unchanged with the rising of temperature, which is applied as reference signal; while that of Tm 3+ enhances evidently, which is applied as temperature signal. The calculated maximum absolute temperature sensitivity (S a ) and relative temperature sensitivity (S r ) are 0.17 K −1 at 393 K and 1.76% K −1 at 313 K, respectively.
研究领域:
材料科学
·
纳米技术
·
光学
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2017
·Vol. 9
·期 12
·2223-2233
·
IF 1.671
Tan Haihu,Xie Shaowen,Xu Jianxiong,Li Na,Zhang Changfang,Xu Lijian,Zheng Jie
Rational design and fabrication of multimodal imaging nanoprobes are of great significance for many imaging applications. Here, we report the systhesis of water-soluble hexagonal NaYF4:Yb, Er up-conversion phosphors (UCPs) with branched structure by hexadecylpyridinium chloride
(CPC) and tri-sodium citrate (Na3Cit) binary cationic/anionic capping agents assisted hydrothermal reaction. The crystal phase, morphology, and size of NaYF4:Yb, Er UCP were controlled by the concentration of Na3Cit and CPC, molar ratio of NaF:RE3+,
hydrothermal temperature, hydrothermal time, as well as analyzed by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray diffraction (XRD). By tuning and optimizing hydrothermal conditions, NaYF4 UCPs experienced the phase transition from pure cubic phase to
mixed cubic/hexagonal phases to pure hexagonal phase, as well as morphology changes from spherical nanoparticles to short pillar structures, and ultimately to branched structures. Due to the special geometrical shape, the branched NaYF4:Yb, Er UCPs could be blended with host materials
without further surface modification. As a proof-of-concept, branched NaYF4:Yb, Er phosphors were then incorporated into polyvinyl alcohol (PVA) matrix to develop a novel luminescence composite film. The resulting PVA/NaYF4:Yb, Er composite film possessed optical transparence
at daylight and emitted green fluorescence at the irradiation of a 980 nm laser. NaYF4:Yb, Er phosphors and hybrid PVA/NaYF4:Yb, Er demonstrate high potential of fluorescent materials used for anti-counterfeiting and other optical applications.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
发光学
·
防伪技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Yuanqi Qian,Huhui Fu,Yaning Zhang,Jingbing Lu,Qi Xiong,Min Liu
Potassium heptafluozirconate (K 3 ZrF 7 ) has emerged as a promising host for lanthanide-doped upconversion nanocrystals owing to its unique “soft” crystal structure, which endows it with inherent biodegradability and excellent biocompatibility. Although the ultrafast room-temperature synthesis of K 3 ZrF 7 :Yb/Er nanocrystals has been reported, morphology-controlled growth and its influence on optical properties remain insufficiently understood. In this study, we present a systematic study on the morphology-controlled synthesis of K 3 ZrF 7 :Yb/Er nanocrystals via a facile room-temperature coprecipitation method. By modulating the concentration of potassium acetate and the content of ethylene glycol, a well-defined morphological evolution from cubes to cuboctahedra and ultimately to regular octahedra was achieved, accompanied by a size reduction from the micrometer scale to sub-100 nm. The optimized octahedral nanocrystals exhibited pronounced thermally enhanced upconversion luminescence, with a 5.6-fold increase in emission intensity at 423 K compared to that at 303 K. Furthermore, based on the luminescence intensity ratio between the non-thermally coupled levels of Er 3+ ( 4 F 9/2 and 2 H 11/2 ), a high absolute sensitivity of 301.3% K −1 and the maximum relative sensitivity of 1.27% K −1 were achieved at room temperature. These findings demonstrate that morphology engineering is an effective strategy for tuning the optical and thermal properties of K 3 ZrF 7 -based nanocrystals, highlighting their great potential for high-performance optical thermometry.
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 3
·1866-1872
·
IF 1.134
Li Na,Tan Haihu,Xie Shaowen,Liu Simin,Tong Chao,Ouyang Min,Xu Lijian
Upconversion nanocrystals with uniform size and hydrophilic surface have potential applications in biological medical engineering. In this study, hydrophilic NaYF4:Yb, Er nanospheres were synthesized via hexadecylpyridinium chloride (CPC) mediated hydrothermal process. The
synthesized NaYF4:Yb, Er upconversion nanospheres (UCNSs) were characterized by various characterization methods. Results showed that the synthesized UCNSs exhibited a uniform sphere-like structure with average diameter of ~250 nm. The surface of UCNSs was captured by CPC molecule
indicating hydrophilic properties of UCNSs. The spherical UCNSs composed of mixed phase (α+β) NaYF4 nanocrystals. This is the novel study for synthesis of NaYF4:Ln3+ crystal employing CPC as ligand. Moreover, the effect of CPC concentration on
synthesis of UCNSs was investigated by comparatively studying morphology, crystal phase and luminescent properties of desired sample prepared under different experimental conditions. It was found that high concentrations of CPC ligands were more favorable for forming NaYF4 crystal
nanospheres with morphology that is more regular, have smoother surface, with higher crystallinity and better upconversion fluorescent properties. The possible growing mechanism was proposed and growing of NaYF4:Yb, Er nanospheres followed the classical Ostwald ripening process.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Huanhuan Li,Shujat Ali,Wenya Wei,Yi Xu,Haowei Lu,Md Mehedi Hassan,Xiangyang Wu,Min Zuo,Qin Ouyang,Quansheng Chen
In this study, a novel fluorescence approach for the rapid and selective detection of organophosphorus pesticides is presented. The strategy is based on inhibition of acetylcholinesterase (AChE) activity and NaY/GdF 4 :Yb, Er up-conversion nanoparticles (UCNPs) fabricated with manganese dioxide (MnO 2 ) nanosheets. Water-soluble UCNPs were first synthesized, and MnO 2 nanosheets were fabricated on their surface to get an efficient quencher for up-conversion fluorescence. Subsequently, AChE was used to restore the fluorescence by dissociation of MnO 2 nanosheets from the surface of UCNPs. When diazinon was added into the system, AChE activity was irreversibly impeded and resulted in the quenching of fluorescence. The inhibitory effect was linearly dependent on the concentration of the pesticide. Under the optimized conditions, the proposed sensor showed excellent performance for the detection of diazinon with a wide detection range of 0.1 to 30 ng/mL and a low detection limit (LOD) of 0.1 ng/mL. Besides, the system showed a good selectivity and was applied for diazinon detection in adulterated tea samples with a recovery rate of 98% to 111%. The unique advantages of the strategy such as simple, cost-effective, highly selective and sensitive make it an attractive approach for the detection of OPs in tea commodities.
研究领域:
分析化学
·
食品安全
·
纳米技术
·
生物传感
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）