MATERIALS RESEARCH BULLETIN
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2022
·
IF 5.6
Huazhen Liao,Song Ye,Jingxin Ding,Jianzhong Yu,Xinling Xv,Ling Pan,Peixuan Lin,Deping Wang
Enabling the drug delivery systems with drug release monitoring function is of essential importance to enhance therapeutic effectiveness. Herein, we took a ship-in-a-bottle synthesis strategy to construct the upconversion nanocrystal and zeolite compounded drug delivery system with real-time monitoring function, by using desilicated ZSM-5 zeolite as drug carrier and NaYF 4 : Yb 3+ /Tm 3+ nanocrystal as luminescent probe. Benefiting from the enlarged mesoporous in desilicated ZSM-5, the NaYF 4 : Yb 3+ /Tm 3+ nanocrystals can be successfully loaded inside and the upconversion emission intensity of Tm 3+ under 980 nm excitation was one order of magnitude enhanced after mild heat treatment. The drug release monitoring function were studied by using doxorubicin as model drug, the experimental results indicated that the upconversion emission intensity ratio of I 802nm /I 475nm can accurately evaluate drug release percentage. Further in vitro cytotoxicity evaluation suggested the doxorubicin-loaded [email protected] /DS/HT has excellent biocompatibility and is able to inhibit tumor cells effectively.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiyao Tian,Yuning Ma,Junchao Zhang,Hongxia Wang,Yiwang Tang,Jia Lu,Liangyun Yu,Xintong Liu,Xiulan Xin
The development of luminescent materials exhibiting dual luminescent modes for anti-counterfeiting purposes is of significant importance. In this study, we introduce and synthesize hybrid materials composed of carbon quantum dots and up-conversion particles (CDs@UCNP). By combining Yb 3+ and Er 3+ doped NaYF 4 up-conversion nanoparticles with carbon quantum dots, we successfully prepared a kind of fluorescent materials that demonstrate dual-mode fluorescence. By changing the fluorescent color of carbon quantum dots to achieve different down-conversion (DC) luminescence, we produced three dual-mode luminescent materials: BCDs@UCNP, YCDs@UCNP, and RCDs@UCNP, which exhibit blue, yellow, and red DC luminescence when exposed to 365 nm ultraviolet light, alongside green or red up-conversion luminescence under 980 nm laser. Furthermore, we formulated three water-based inks utilizing water-based acrylic emulsion as a binder. These inks exhibit dual-mode tunable luminescence properties, thereby enhancing the security of the printed patterns and positioning them as promising candidates for anti-counterfeiting applications.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Guo Gong,Ya Song,Haihu Tan,Shaowen Xie,Changfan Zhang,Lijian Xu,Jianxiong Xu,Jie Zheng
Lanthanide-doped NaYF 4 upconversion luminescent nanophosphors have attracted great interest for anti-counterfeiting applications. However, low luminescent intensity caused by surface defects and low extinction coefficients of lanthanide dopants greatly limits their practical applications. Herein, we developed core/active-shell NaYF 4 :Ln 3+ @NaYF 4 :Yb 3+ (e.g. NaYF 4 :Er 3+ /Tm 3+ @NaYF 4 :Yb 3+ , NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 :Yb 3+ , and NaYF 4 : Yb 3+ /Tm 3+ @NaYF 4 :Yb 3+ ) nanophosphors with enhanced near-infrared (NIR)-to-visible upconversion luminescence by coating Yb 3+ -doped NaYF 4 shell (active-shell) on NaYF 4 :Ln 3+ upconversion core nanoparticles . The structure, morphology, and elemental composition of NaYF 4 :Ln 3+ @NaYF 4 :Yb 3+ core/active-shell nanoparticles (CASNs), NaYF 4 :Ln 3+ @NaYF 4 core/inert-shell nanoparticles, and NaYF 4 :Ln 3+ core nanoparticles were characterized and compared systematically to reveal their structure-property relationship. Collective data showed that coating of a NaYF 4 :Yb 3+ active shell on NaYF 4 :Ln 3+ cores significantly enhanced upconversion luminescent intensity by ~21 times, while an inert (pure NaYF 4 ) shell coated on the surface of NaYF 4 :Ln 3+ core only resulted in 5.2 times luminescence enhancement. The enhanced upconversion luminescence intensity was mainly attributed to (i) the NaYF 4 shell-reduced quenching effect and (ii) the promoted transformation of the absorbed NIR light from the pump source to the core nanoparticles by Yb 3+ sensitizer in the active shell. Moreover, by tailoring dopant pairs and molar ratios of lanthanide ions in the core nanoparticles, three CASNs with enhanced red, green, and blue upconversion luminescence were obtained and fabricated into environmental benign luminescent inks. The inkjet printing of RGB CASNs inks on papers produced multiple-color, high-resolution, complex luminescent patterns under 980 nm laser. This work expands the lanthanide-doped NaYF 4 materials for anti-counterfeiting applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Tao Pang,Mingyue Cai,Qiqi Chen,Jianping Xie,Ronghua Jian,Wenhui Lu
NaYF 4 :Yb 3+ /Ho 3+ /Ce 3+ upconversion phosphors were synthesized by using a citric acid assisted hydrothermal method . Both increasing the concentration of Ce 3+ and decreasing the Yb 3+ content are beneficial to the formation of cubic NaYF 4 . When the concentration of Yb 3+ /Ho 3+ /Ce 3+ were 20/1/20 and 5/1/10, respectively, a pure cubic phase was obtained. The spectral conversion from green to red was achieved by first increasing Ce 3+ concentration to 10% and then decreasing the Yb 3+ concentration to 5%. In the first half, the two cross relaxation processes between Ho 3+ and Ce 3+ were responsible for the modulation of the luminescence, while in the latter half, the enhanced intensity ratio of red to green emission was related to the decreased energy transfer from Ho 3+ to Yb 3+ . Except for the sample doped with 5% Yb 3+ , 1% Ho 3+ and 10% Ce 3+ , the total emission intensity of other samples decreased linearly with increasing sample temperature. The maximum responsibility was obtained in the case of 20% Yb 3+ , 1% Ho 3+ and 5% Ce 3+ doping. Compared to the Er 3+ based luminescent temperature sensing, this novel temperature sensing not only shown little impact from pump power, but also had the identical sensitivity at various temperatures, and thus being a promising candidate for temperature sensing.
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高影响因子
Nanoscale Horizons
·
2018
·Vol. 3
·期 6
·616-623
·
IF 9.391
Baoqi Liu,Zhipeng Meng,Suli Wu,Yue Wu,Shufen Zhang
Rational control of the multiple emission outputs and achieving single-band and strong luminescence of Ln3+ doped upconversion nanoparticles is highly desirable for their applications in sensor and display fields. Here, we designed a sandwich structure to separate and enhance the green and red emission of NaYF4:Yb3+/Er3+ simultaneously and realized pure strong green and red emissions. NaYF4:Yb3+/Er3+ nanocrystals were sandwiched between two layers of photonic crystals, which have bandgaps at 660 nm and 530 nm, respectively. The photonic crystal with a bandgap at 530 nm on top of the NaYF4:Yb3+/Er3+ layer can filter the green emission of NaYF4:Yb3+/Er3+, prohibiting its emission upward, and at the same time, enhancing its emission downward. Similarly, the photonic crystal with a bandgap at 660 nm can prohibit the transmission of the red emission, and at the same time enhance its reflection in the opposite direction. Consequently, enhanced green emission was observed from the bottom of the sandwich structure and enhanced red emission was observed from the top of the sandwich structure. Thus, the green and red emissions of NaYF4:Yb3+/Er3+ were separated and both of them were enhanced. On the other hand, when using a photonic crystal with a bandgap that overlapped with the excitation light of NaYF4:Yb3+/Er3+ nanoparticles, their emissions were all greatly enhanced. Our results suggest that photonic crystals are good candidates to separate and enhance the emissions of Ln3+ doped luminescent materials.
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PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 12
·9656-9664
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IF 1.556
Wang Chuanying,Cheng Xianhua
Yb3+ and Er3+ ions co-doped α-NaYF4:Yb3+, Er3+ nanocrystals were successfully synthesized via a facile hydrothermal method using citric acid (CA) as chelating ligand and NaNO3 as mineralizer. The influences
of the CA/RE (RE= Y+Yb+Er) molar ratio, reaction time, reaction temperature and the NaNO3/RE molar ratio on the crystal phases and shapes of as-prepared products have been well investigated. The possible formation mechanism has been discussed in detail and an aggregation growth
theory has been proposed. X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), scanning electron microscopy (SEM), and photoluminescence (PL) spectra were used to characterize the products. Under 980 nm excitation, the emission intensities
of the as-prepared nanocrystals were much stronger than that of the nanocrystals modified by ethylenediaminetetraacetic acid (EDTA). Additionally, the as-prepared products maintained spherical shape and high degree of monodispersion, which is expected to be suggestive for the preparation of
other complex rare earth fluoride compounds.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 8
·8254-8270
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IF 1.798
Xi Junhua,Ding Mingye,Dai Jianbin,Pan Yajing,Chen Daqin,Ji Zhenguo
In this paper, Yb 3+ /Er 3+ co-doped hexagonal NaYF 4 have been successfully synthesized by solvothermal, thermal decomposition, hydrothermal and molten salt method, respectively. The crystal structures, particle morphologies, sizes and corresponding upconversion luminescent properties of β-NaYF 4 :Yb 3+ /Er 3+ nano/microcrystals are systemically studied. It is interesting to observed that the temperature-dependent UC luminescent properties of β-NaYF 4 :20 %Yb 3+ , 2 %Er 3+ samples are strongly related to their synthesis methods. Comparison of the upconversion luminescence and thermal sensitivity between the β-NaYF 4 :Yb 3+ /Er 3+ samples reveals that β-NaYF 4 :Yb 3+ /Er 3+ sub-microplates synthesized by thermal decomposition method have much stronger green emission intensity, better luminescent thermal stability and higher temperature sensitivity. This findings are relevant to the application of β-NaYF 4 :Yb 3+ /Er 3+ in optical temperature sensors and to the further understanding of the UC luminescent mechanism.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 21
·4215
·
IF 4.6
Yukun Tang,Pingping Yang,Jinpu Xie,Tengfei Duan,Zengmin Tang,Yao Liu,Rui Zhang,Haihu Tan,Jingjing Du,Lijian Xu
In recent years, cadmium sulfide (CdS) has been widely investigated due to its excellent photocatalytic performance. However, its practical application in pollutant treatment is limited by its narrow photoresponse range and susceptibility to photocorrosion. Herein, we design a unique four-layer core–shell structure NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 @CdS@Au (CSNPs@CdS@Au), with an inert NaYF 4 shell coating on NaYF 4 :Yb 3+ ,Er 3+ (CNPs) to form NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 (CSNPs) and CdS depositing on CSNPs (CSNPs@CdS); Au nanoparticles are loaded on CdS (CSNPs@CdS@Au). Compared with CdS (9.81%), CSNPs (5.0%), CSNPs/CdS (6.9%), and CSNPs@CdS (81.0%), CSNPs@CdS@Au degrades 97.7% Rhodamine B (RhB) within 15 min, exhibiting superior photocatalytic performance, attributable to two key factors: (1) the NaYF 4 inert shell encapsulation amplifies upconversion (UC) luminescence intensity by suppressing surface quenching; and (2) the electron transfer between Au nanoparticles and CdS effectively promotes spatial separation of photogenerated charge carriers and increases reactive active sites. Additionally, after five degradation cycles, CSNPs@CdS@Au still maintains a 93.25% degradation rate for RhB, confirming its excellent stability. This remarkable stability is attributed to the uniquely designed multilayer core–shell architecture, which significantly enhances structural integrity through physical isolation effects. This study establishes a material preparation strategy for efficient photocatalytic pollutant degradation.
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PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 26
·11179-11189
·
IF 6.7
Zhenlong Cheng,Mingzhou Meng,Jiaoyu Wang,Zhuoyue Li,Jiao He,Hao Liang,Xin Qiao,Yuanli Liu,Jun Ou
Non-contact optical temperature sensors are highly sought after by researchers due to their satisfactory temperature resolution (δ(T) < 0.1 °C), high relative thermal sensitivity (Sr > 1% °C−1), fast temporal response (t < 0.1 s), and long-term optical stability. In this study, NaYF4:Yb3+/Ho3+/Tm3+ upconversion nanoparticles were prepared by a solvothermal method, and their crystal structure, microscopic morphology, and luminescence mechanism, together with the temperature sensing properties of the specimens, were investigated. Under 980 nm laser excitation, the specimens exhibited strong upconversion luminescence, and the emission peaks corresponded to the characteristic energy level jumps of Ho3+ and Tm3+, respectively. The temperature-dependent luminescence spectra of the samples were investigated based on the fluorescence intensity ratio (FIR) technique over a temperature gradient of 295–495 K. The samples are based on thermally coupled energy levels (TCLs: 1G4(1,2) → 3H6(Tm3+)) and non-thermally coupled energy levels (NTCLs: 3F3 → 3H6(Tm3+) and 5F3 → 5I8(Ho3+), 3F3 → 3H6(Tm3+) and 1G4 → 3H6(Tm3+), 3F3 → 3H6(Tm3+) and 5F5 → 5I8(Ho3+), 3F3 → 3H6(Tm3+) and 5F4 → 5I8(Ho3+)) for temperature sensing performance. The maximum absolute sensitivity (Sa), relative sensitivity (Sr), and minimum temperature resolution δ(T) were found to be 0.0126 K−1 (495 K), 1.7966% K−1 (345 K), and 0.0167 K, respectively, which are better than those of most sensing materials, and the simultaneous action of multiple coupling energy levels can further improve the temperature precision. This study indicates that the sample has a good value for optical temperature measurement and also provides new ideas for the exploration of other high-quality optical temperature sensing materials.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2020
·
IF 4.706
Hao Tang,Ying Xu,Xianhua Cheng
To investigate the optical properties of rare earth upconversion particle, the Cr 3+ and alkaline-earth ions (Mg 2+ or Ca 2+ ) co-doped β-NaYF 4 :Yb 3+ /Er 3+ upconversion microparticles (UCMPs) were synthesized via a facile hydrothermal method . The influences of co-doping ions and their concentrations on crystal structure, particle morphology and optical properties were thoroughly investigated by XRD , SEM , FT-IR spectra, UV–VIS-NIR absorption spectra and photoluminescence spectra. And the effects of the two kinds of impurity ions co-doping on the UC particle growth were studied. We found that luminescence quenching could be inhibited by using Cr 3+ and Mg 2+ co-doping due to the asymmetrical ion arrangement around activator. However, the Cr 3+ and Ca 2+ co-doping was found to quench the upconversion luminescence (UCL), and the possible mechanism was suggested. These discoveries lead to new insights into the quenching effect and new strategy to design UCMPs for better luminescence performance.
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高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Huazhen Liao,Song Ye,Yanling Shi,Deping Wang
Small size optical-magnetic bifunctional upconversion nanoparticles (UCNPs) that can be effectively triggered by 808 nm exhibit distinct advantages of improved tissue penetrating depth, minimized overheating effect, possible for multimodal imaging and high clearance rate, which therefore are considered as desirable candidates for bioapplications. In this research, the 808 nm triggered sub-20 nm β-NaYF 4 :Yb 3+ /Er 3+ @NaGdF 4 :Yb 3+ /Nd 3+ @NaGdF 4 active-core@active-shell@inert-shell structured UCNPs with optical and magnetic bifunctional properties were developed by seed-mediated growth method with NaOA as sodium source instead of the generally used NaOH. Through optimizing Nd 3+ doping concentration and outermost NaGdF 4 inert-shell thickness, the optical-magnetic bifunctional core-shell-shell structured UCNPs exhibited strong UC emission intensity and improved magnetic property . Furthermore, the core-shell-shell NPs were validated to be no cytotoxicity by cell viability assessment. Therefore, this research may open a general avenue for the synthesis of small size multifunctional UCNPs for practical bioapplications without overheating.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Lei Chen,Yanwen Jing,Zhimin Xu,Mengyao Shao,Shengyan Ge,Xingfu Zhou
The introduction of up-conversion materials converting near infrared light into useable visible light has been proven to be a promising strategy for improving the performance of perovskite solar cells . In this work, the up-conversion material of NaYF 4 :Yb 3+ , Er 3+ nanoparticles (NPs) were successfully prepared by one-step hydrothermal route and incorporated into Al 2 O 3 as the scaffold layer for the air-processed carbon-based mesoscopic perovskite solar cells (MPSCs). FESEM shows that the size of NaYF 4 :Yb 3+ , Er 3+ nanoparticles is about 100 nm and there is no obvious agglomeration. The UV–vis–NIR absorption spectrum of the mixed scaffold layer demonstrates a distinct infrared light response. The infrared photoelectric efficiency and EQE tests were used to verify that NaYF 4 :Yb 3+ , Er 3+ nanoparticles improved the photo response of the device in the infrared region, thereby improved the photoelectric performance of the MPSCs. An optimal efficiency of 13.04% was obtained by incorporating 25 wt% NaYF 4 :Yb 3+ , Er 3+ nanoparticles into the Al 2 O 3 scaffold layer, which shows a 20.6% increase in conversion efficiency when compared with the device without using the up-conversion material (10.81%). The optimized carbon-based MPSCs also show an infrared responded PCE value of 0.11% under infrared irradiation from 800 to 1100 nm. This paper shows that the up-conversion material expands the light response of solar cells to the infrared region and provides an effective method for the preparation of high-efficiency perovskite solar cells.
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