JOURNAL OF FLUORINE CHEMISTRY
·
2023
·
IF 1.9
Shuang Wu,Yanhui Dong,Hao Cui,Daguang Li,Weiping Qin
The morphology and size of LiYF 4 :Yb,Er nanoparticles were controlled using an automatic nanomaterial synthesizer by changing the reaction time at high temperature. It was found that the nanoparticles underwent a growth and change process from small to large and then to small, and then remained at a basically stable size, reflecting the different growth stages of the nanoparticles, such as nucleation, growth, phase transition, and internal Ostwald ripening, etc. XRD analyses showed that LiF nanocrystals were first formed during the reaction process, and then all the products were converted into LiYF 4 nanocrystals. Under the excitation of a 980 nm laser, the LiYF 4 :Yb,Er nanoparticles showed regular downconversion and upconversion luminescence properties, which was basically consistent with the regularity of nanocrystal growth. The experimental results showed that the upconversion luminescence and downconversion luminescence intensities of nanocrystals increasd rapidly when the synthesis time was between 0 and 50 min, and they increased slowly after the synthesis time exceeded 50 min.
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高影响因子
JOURNAL OF MODERN OPTICS
·
2024
·
IF 1.2
Hui Ying Zhang,Wan Ying Xie,Peng Zhang,Xiao Hui Li,Zian Cheak Tiu
In this work, NaGdF4: 20%Yb, 2%Er microcrystals with varying contents of Cr3+ doping were obtained by conventional hydrothermal process. The microcrystal phase structure, morphology, upconversion luminescence mechanism, as well as temperature sensing behaviour under different treatment methods were researched. Based on the thermally coupled 2H11/2 and 4S3/2 levels of Er3+ and the dependence of fluorescence intensity ratio (FIR) on temperature, the optical temperature sensing behaviour of micrometer crystals were experimentally demonstrated. The NaGdF4: 20%Yb, 2%Er, 7%Cr microcrystals treated with high-temperature annealing show the best temperature sensing behaviour within the temperature span of 298–498 K. NaGdF4: 20%Yb, 2%Er, 7%Cr microcrystals with high temperature annealing presented the feasibility and promising properties for optical temperature sensing. The endeavour of emerging materials could lay the groundwork for future sustainable photonics engineering industrial growth.
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高影响因子
ISRAEL JOURNAL OF CHEMISTRY
·
2015
·Vol. 56
·期 4
·242-248
·
IF 2.221
Junwei Zhao,Jian Wu,Junfei Xue,Qiannan Zhu,Weihai Ni
Graphical Colloidal superparticles (SPs) are nanoparticle (NP) assemblies in the form of colloidal particles. Assembling nanoscopic objects into mesoscopic or macroscopic composite architectures allows for the bottom-up fabrication of functional nanomaterials. In this study, a method for single-step self-assembly synthesis of Au/NaYF 4 : Yb,Er SPs was developed using oil-in-water (O/W) microemulsions to simultaneously encapsulate gold nanoparticles (AuNPs) and NaYF 4 : Yb,Er upconversion nanoparticles (UCNPs) via evaporation at room temperature. The synthesized Au/NaYF 4 : Yb,Er SPs possess good dispersibility and stability. When the number of AuNPs added is increased, the SPs exhibit decreased upconversion luminescence, which can be ascribed to the Förster resonance energy transfer (FRET) from the NaYF 4 : Yb,Er UCNPs to the AuNPs. Time-resolved measurements of the green emission further confirm the existence of a new decay route corresponding to the FRET process. Our research provides a facile and versatile strategy for the synthesis of novel multifunctional nanocomposites with tunable upconversion luminescence properties, which can be of great significance in biological applications.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Jian Zhang,Cong Cao,Jinsong Wang,Shiwen Li,Yu Xie
Multicolor upconversion luminescence (UCL) plays an essential role in anti-fake and information encipher. Here, we report a strategy to expand the color-adjustable emission range by regulating the doping concentration of Yb3+ in core@shell (C@S) upconversion nanoparticles (UCNPs) under the excitation of near-infrared (NIR) light at 980 nm and promoting the energy-transfer process. Subsequently, multicolor UCNPs were combined with acrylamide hydrogel to construct a three-dimensional (3D) information code with an adjustable emission color. The encoded information is readable only under 980 nm excitation light and disappears as soon as the excitation light is removed. We adopted three strategies to improve the security: multiple permutations and combinations of different emission light hydrogel blocks, the combination of rich optical information and binary code, and the shape coding of hydrogel blocks. Constructing a complex and changeable coding library significantly guarantees that the data can be enciphered and deciphered by simple light irradiation, and the content can be edited by permutation and combination combined with information coding rules. Therefore, it is expected to provide ideas for developing intelligent anti-counterfeiting materials and devices.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yan Xiangyang,Li Ningning,Li Maoyi,Fan Kaixuan,Xia Huiyun
This study addresses the efficient
and safe purification
of low-concentration
atmospheric NO. A Yb/Er-codoped nanostructured BiOBr was synthesized
via a solvothermal method, and a composite superhydrophobic coating
(FSBE) was fabricated by a layer-by-layer spraying strategy using
epoxy resin, nano-SiO 2 , and perfluoroalkyltrimethoxysilane,
achieving integrated high photocatalytic activity and excellent micronano-structured
superhydrophobicity. The Yb/Er codoping successfully modulates the
original layered BiOBr into spherical hollow microspheres assembled
from interconnected nanoplates with an optimal Yb/Er ratio of 10:1.
This modification enlarges the specific surface area by approximately
7 times, broadens the light response range, and effectively restrains
the recombination of photogenerated carriers. The constructed FSBE
coating possesses a micronano rough surface with water and ethylene
glycol contact angles above 150 ° , demonstrating superior self-cleaning
performance. Under visible light and full-spectrum irradiation, the
FSBE coating delivers NO degradation efficiencies of 62.0 and 78.4%,
which are 2.85-fold and 1.5-fold higher than those of pure BiOBr,
respectively, while efficiently suppressing NO 2 accumulation.
The coating maintains a photocatalytic efficiency of 65.8% after five
cycling tests and exhibits excellent mechanical abrasion resistance
and chemical stability. The synergistic effect between the superhydrophobic
self-cleaning structure and nanoscale rare-earth-doping-enhanced photocatalysis
accounts for its durable NO purification capability. This work provides
an insight into the design of high-performance and long-lived photocatalytic
nanocoatings for atmospheric environmental remediation.
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JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Yue Wang,Yaomin Lei,Wuqin Chen,Ruian Yang,Xinyang Gu,Gaofeng Pan,Xuesong Zhai,Jinshan Wang
Luminescence quenching effect of lanthanide-doped upconversion materials occurs with high probability even in larger-sized particles, but their main quenching pathway remains controversial. In this work, we investigate the influence of the surfactant and pH value on the luminescence properties of β-NaLuF 4 :Yb,Er microcrystals. A convincing evidence can be provided by the combination of X-ray diffraction (XRD), inductively coupled plasma (ICP) spectrometer, and Eu 3+ structural probe measurements that the major quenching pathway comes from the fast energy migration from the excited lanthanides to nearby OH − defects in the crystal lattice rather than surface quenching effect. Even at OH − -rich reactant condition, the upconversion luminescence intensity becomes more efficient by reduced internal quenching effects. Our findings provide a new and fundamental understanding of severe luminescence quenching effect at microscale, thus guiding the design and preparation of highly efficient upconversion materials.
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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.
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高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Huilian Qin,Jing Li,Meijuan Yuan,Yaru Peng,Yuxin Huang,Li Chen
Monodisperse sub-10 nm Sc 2 O 3 : Yb, Er upconverting nanoparticles (UCNPs) were firstly synthesized via solvothermal method in three-neck round-bottom flask. The X-ray diffraction (XRD) shows that the prepared UCNPs possess cubic structure. The transmission electron microscopy (TEM) shows that sample has monodisperse spheroid morphology with high crystallinity . The average size of spheroid UCNPs could be controllable manipulated as small as 3 nm. Furthermore, the sample exhibits stronger red and green upconversion luminescence (UCL) than reported Sc 2 O 3 : Yb, Er nanostructure by biphasic solvothermal method. The Fourier-transform infrared (FTIR) spectra and decay curve reveal that ultra-small Sc 2 O 3 : Yb, Er UCNPs exhibit the reduced surface groups and long decay time of Er 3+ ions. The results indicate Sc 2 O 3 : Yb, Er UCNPs is a probable oxide material with small size and intense UCL for biological applications.
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高影响因子
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.
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PubMed
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.
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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.
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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.
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