OPTICAL MATERIALS
·
2024
·
IF 3.8
Yu Yin,Jie Chen,Rong Liu,Xiaodan Zeng,Wei Zhao,Zhigang Liu,Mingshuo Ma
Water-dispersed red upconversion nanoparticles (UCNPs) have great application prospects in the biomedical field. Thus, a series of Er 3+ -based upconversion nanoparticles (Er-UCNPs) with excellent red upconversion luminescence under three-wavelength NIR excitation (808/980/1550 nm) were prepared by a simple thermal decomposition method, and then further functionalized by PAA to achieve good water dispersibility. Compared with NaErF 4 bare core, the emission intensity of Er-UCNPs samples doping of 0.5%Tm 3+ and 0.5%Ho 3+ as energy capture centers was significantly enhanced, and further improved after coating with NaYF 4 inert shell. Meanwhile, among all Er-UCNPs@NaYF 4 samples, NaErF 4 @NaYF 4 exhibited the highest emission intensity and longest luminescence lifetime due to the efficient suppression of luminescence quenching effect, while NaErF 4 :0.5%Tm 3+ @NaYF 4 showed highest red luminescence purity owing to the energy transfer process between Tm 3+ ( 3 H 5 ) and Er 3+ ( 4 I 13/2 ). The hydrophilic Er-UCNPs@NaYF 4 @PAA samples still maintained good red luminescence under multi-wavelength excitation. The luminescence enhancement mechanism in Er-UCNPs@NaYF 4 was discussed in detail based on spectral characteristics. The as-prepared water-dispersed Er-UCNPs@NaYF 4 @PAA with bright red luminescence under multi-wavelength NIR excitation will have potential applications in targeted therapy and deep tissue imaging.
研究领域:
生物医学
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材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Yuhong Zhang,Nan Zhang,Pengcheng Wang,Xingke Zheng,Yibin Guo,Hang Liu
In this work, tungstate BaWO 4 phosphors doped Ho 3+ -Yb 3+ -Gd 3+ ions are successfully synthesized through solid-state reaction method. Under the excitation of a 980 nm laser, the up-conversion (UC) luminescence properties are investigated simultaneously. The blue (465 nm, 489 nm), green (541 nm) and red (665 nm) emission intensities of BaWO 4 : Ho 3+ /Yb 3+ /Gd 3+ samples are dramatically enhanced by 20.59, 9.83, 7.37, and 27.59 times more than those without Gd 3+ ions. The possible reason is discussed, which attributes to the energy transfer efficiency enhancement from Yb 3+ to Ho 3+ due to the lattice expansion induced by Gd 3+ ions. The temperature-sensing properties of BaWO 4 : Ho 3+ /Yb 3+ /Gd 3+ samples are also discussed based on the fluorescence intensity ratio (FIR) technology. The sensitivity of temperature measurement for BaWO 4 : Ho 3+ /Yb 3+ /Gd 3+ sample is higher than that of BaWO 4 : Ho 3+ /Yb 3+ . It proves that the codoped Gd 3+ ions can also increase the temperature sensitivity because the higher UC emission efficiency will lead to a high signal-to-noise ratio. The result provides an effective way to design UC luminescence materials with high temperature sensing properties.
研究领域:
材料科学
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光学材料
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发光学
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传感器技术
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无机功能材料
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 28
·10537-10546
·
IF 4.052
Guofeng Liu,Yeqing Chen,Mochen Jia,Zhen Sun,Binbin Ding,Shuai Shao,Fan Jiang,Zuoling Fu,Ping'an Ma,Jun Lin
Rare earth ion-doped fluoride upconversion nanoparticles (UCNPs), emerging as a novel class of probes and drug carriers, exhibit superior promise for bio-applications in diagnostics and treatment on account of their strong luminescence, fine biocompatibility, and high drug loading. However, the fine control and manipulation of particle size and the distribution of rare earth ion-doped oxides has remained an insurmountable challenge to date. In this work, we construct and synthesize silica-coated Gd2(WO4)3:Yb3+/Ho3+ nanoparticles by one-pot co-precipitation, with uniform distribution (∼130 nm) and enhanced yellow fluorescence. Particularly, the nanoparticles not only possess outstanding temperature sensing performance at biological temperatures in water by utilizing the fluorescence intensity ratio (FIR) method, but also allow a further serviceable contrast effect in vitro and in vivo based on the prominent T1-weighted magnetic resonance (MR) signal of Gd3+. Compared with cisplatin and platinum(IV) (DSP), the Gd2(WO4)3@SiO2 nanoparticles functionalized with DSP (Gd2(WO4)3@SiO2-Pt-PEG) exert higher lethality against CT26 cells and significantly inhibit the growth of tumors at the same concentration of Pt. This effect occurs through the greater level of cell endocytosis. The lethality value of the latter is 10 times higher than the former after the same length of time according to inductively coupled plasma-mass spectrometry (ICP-MS) results. In short, the monodisperse and strongly fluorescent Gd2(WO4)3@SiO2-Pt-PEG nanoparticles are endowed with dual-mode imaging, temperature sensing and anticancer functions, which provide a significant guide for synthesis and bio-application of lanthanide ion-doped oxides.
研究领域:
生物医学工程
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纳米医学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2024
·Vol. 18
·期 11
·2400151
·
IF 9.8
Jiaoyin Zhao,Jiwen Chang,Nan Wang,Peihang Zhao,Mengyuan Zhu,Ying Liu,Dongxu Guo,Yu Wang,Panlai Li,Zhijun Wang,Hao Suo
Thermal quenching of luminescence materials poses a major obstacle to the technological application of luminescence thermometry. It still remains challenging to attain thermally enhanced light emissions, especially in the second near-infrared window (NIR-II). Herein, an anomalous thermal dependence of NIR-II luminescence in the negative thermal expansion (NTE) Sc 2 Mo 3 O 12 :Er 3+ /Ho 3+ nanocrystals is reported. Mechanistic investigations affirm that Ho 3+ ion can work as an energy reservoir and back-transfer to Er 3+ ion with the assistance of lattice phonon at elevated temperatures. Moreover, the Ho 3+ -mediated energy feedback is strengthened by the thermal contraction between dopant ions, thereby enabling a remarkable thermal enhancement of NIR-II emission over 11-fold. The opposite thermal response of Er 3+ and Ho 3+ emissions is harnessed for NIR-II ratiometric thermometry, registering exceptional performance in a high-temperature regime ( S r = 1.71% K −1 , δT = 0.2 K at 513 K). These findings may inspire new insights for addressing the thermal quenching of NIR-II luminescence, which also raises exciting opportunities for flexible thermometry in complex settings.
研究领域:
材料科学
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光学材料
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纳米科技
·
生物医学工程
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分子成像
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温度传感
✓ 已验证
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2023
·
IF 1.8
Yi Yu,Chonghui Niu,Kai Shao,Mingjie Dan,Zhibin Wang,Yingying Wang,Jie Chen,Jiani Luo
A Ho 3+ :KBGM crystal with good quality and large size was successfully grown via TSSG method. The crystal’s structure, ambient-temperature polarized absorption and emission spectra and fluorescence lifetime were studied. The J-O theory was adopted to analyze the absorption spectra and results show that crystal exhibits relatively large intensity parameters Ω 2 and spectroscopic quality factor which is up to 3.12. At 453 nm, the absorption band is the strongest, and the corresponding cross-sections are 21.94 × 10 –20 cm 2 , 26.66 × 10 –20 cm 2 and 18.56 × 10 –20 cm 2 for the - X , - Y and - Z polarizations, respectively. The emission spectra also demonstrate the broad and strong emission band at 2030 nm. The FWHMs and cross-sections are 74 nm, 0.37 × 10 −20 cm 2 , 50 nm, 0.68 × 10 −20 cm 2 , and 49 nm 0.52 × 10 −20 cm 2 for the three polarizations, respectively. In addition, the crystal has a superior quantum efficiency which is as high as 97.1%. Taking all the analyses into account, it is reasonable to assert that the Ho 3+ :KBGM crystal an ideal candidate for ∼2 µm laser applications in many areas.
研究领域:
材料科学
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光学
·
激光物理
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
·
2021
·Vol. 64
·期 4
·558-564
·
IF 9.445
Xue Dongzhi,Liu Yang,Jin Longhai,Wang Yinghui,Cui Fengzhi,Liu Jianhua,Li Xiaoqing,Zhang Songtao,Zhao Ying,Yin Na,Niu Rui,Wang Daguang,Zhang Hongjie
Because of the intrinsic defects of traditional treatment of cancer, it is quite needed to construct novel theranostic nanoagents that can not only improve the accuracy of imaging diagnosis but also achieve highly efficient therapy of cancer. Herein, we fabricated polydopamine-functionalized ammonium holmium fluoride nanocomposites (AHF@PDA) for dual-modality bioimaging (magnetic resonance imaging (MRI) and computed tomography (CT)) owing to the high X-ray attenuation feature and magnetic property of Ho 3+ . Moreover, PDA shell endows AHF@PDA with excellent photothermal conversion performances and robust biocompatibility, leading to good treatment effect in vitro and in vivo . All above positive results certify that AHF@PDA have good potential as theranostic agents for clinical application in the future.
研究领域:
纳米技术
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生物医学工程
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癌症研究
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医学成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Yuhong Zhang,Xuezhong Yang,Hongqun Zhu,Chunhui Sun,Haoran Wang,Haozhou Tian,Hang Liu
Here, a new type of Sb 3+ ions alloying with RE 3+ (RE = Er, Ho) ions heavy concentration doped Cs 2 NaBiCl 6 double perovskites (DPs) was successfully synthesized by solvothermal method. The structure and morphology of all samples were characterized with X-ray diffraction, energy dispersive spectroscopy and X-ray photoelectron spectroscopy. The excitation and emission spectra for all samples are investigated in detailed. Under 354 nm excitation, a strong broad blue emission band from 400 to 500 nm is obtained in Cs 2 NaBiCl 6 :15 mol%Sb 3+ DPs. Compared with the Cs 2 NaBiCl 6 :RE 3+ sample, the emission intensities of Er 3+ and Ho 3+ ions for Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ DPs are enhanced by 38 and 29 times due to alloying Sb 3+ ions, respectively. And the self-trapped exciton (STE) emission intensity is also dramatically increased. The energy transfer process from free exciton (FE) to STE and excited state level of RE 3+ contribute to increased luminescence intensity. In addition, the temperature-dependent luminescence spectra of Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ samples were measured from 83 to 423 K. The luminescence thermal enhancement phenomenon is obtained at lower temperature range. At last, the anti-counterfeiting application of Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ samples is elaborated due to their bright multi-color emission under different excitation and temperatures.
研究领域:
材料科学
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光学材料
·
发光与光子学
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稀土掺杂
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Kejie Li,Haikuo Liu,Zhiying Wang,Mengmeng Dai,Jiaqi Zhao,Zuoling Fu
Near-infrared II (NIR-II, 1000–1700 nm) luminescence has emerged as a powerful tool for biomedical applications, including sensing, imaging, and drug delivery, owing to its superior tissue penetration depth and high spatial resolution. Lanthanide-based NIR-II nanoprobes are particularly promising due to their outstanding photostability and minimal cytotoxicity. However, two critical challenges impede their widespread implementation: severe thermal quenching at elevated temperatures and inefficient downshifting processes. Herein, a novel strategy is reported to address these limitations by precisely modulating energy transfer dynamics between Ho 3+ and Pr 3+ ions in NaYF 4 core–shell engineering. By carefully optimizing the concentration ratio and spatial distribution of these lanthanide ions in NaYF 4 core–shell nanocrystals, the population of 1 G 4 (Pr 3+ ) is significantly increased, effectively suppressing thermal quenching while boosting downshifting efficiency. The optimized system leverages dual NIR-II emission channels ( 1 G 4 and 5 I 6 ) in NaYF 4 :Yb 3+ /Ho 3+ @NaYF 4 :Yb 3+ /Pr 3+ nanocrystals, enabling ultrasensitive temperature sensing with a maximum relative sensitivity ( S r ) of 2.03% K −1 . Furthermore, the synergistic up/down-conversion properties of Ho 3+ and Pr 3+ facilitate multimodal anti-counterfeiting, offering a robust platform for advanced information encryption and storage. This work not only establishes a new paradigm for engineering NIR-II luminescence but also underscores their vast potential in advanced applications, from precision biosensing to high-security encoding technologies.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
光学
·
传感器
·
发光
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2016
·
IF 1.879
Rong Chen,Ying Tian,Bingpeng Li,Feifei Huang,Caizhi Wang,Xufeng Jing,Junjie Zhang,Shiqing Xu
Nd 3+ /Ho 3+ co-doped silicate-germanate glass has been synthesized by high temperature melt-quenching method. Near infrared emission centered at 2 µm has been successfully obtained by incorporating Nd 3+ and Ho 3+ in present glass. The Judd-Ofelt intensity parameters Ω t (t=2, 4, 6), and radiative properties of Ho 3+ were calculated and discussed by using the Judd-Ofelt theory. The energy transfer processes and luminescence properties of Nd 3+ /Ho 3+ co-doped glasses were analyzed pumped by a conventional 808 nm laser diode . Desirable spectroscopic characteristics indicates that Nd 3+ /Ho 3+ co-doped silicate-germanate glass might be a good alternative matrix for 2 µm band mid-infrared laser.
研究领域:
光学材料
·
无机非金属材料
·
光子学
·
激光技术
·
固体物理
✓ 已验证
DOI
高影响因子
Results in Chemistry
·
2025
·
IF 4.2
Juan Wang,Renguang Ye,Youjie Hua,Xuejiao Wang,Tianzhi Jiang,Caixia Song,Luping Lyu,Junhao Wu,Hongping Ma,Chenxia Li,Degang Deng,Shiqing Xu
A series of Y 2 O 2 S: 0.25 % Ho 3+ /x%Yb 3+ (where x = 4, 6, 8, and 10) phosphors were synthesized by using a chemical co-precipitation method, and their temperature sensing properties were systematically investigated. The upconversion luminescence (UCL) spectra of the samples were recorded under 980 nm laser excitation. The Y 2 O 2 S: Ho 3+ /Yb 3+ system exhibits three distinct UC emission bands in the green, red, and near-infrared regions, corresponding to the transitions of 5 F 4 / 5 S 2 → 5 I 8 , 5 F 5 → 5 I 8 , and 5 F 4 / 5 S 2 → 5 I 7 of Ho 3+ , respectively. According to the emission spectra, the sample with a Yb 3+ doping concentration of 6 % exhibited the strongest luminescence intensity, with a quantum yield reaching 4.01 %. To further explore its temperature sensing properties, the fluorescence intensity ratios (FIR) of both thermally coupled energy levels (TCLs) and non-thermally coupled energy levels (NTCLs) of Ho 3+ were systematically analyzed. Notably, temperature sensing materials based on NTCLs exhibit significantly enhanced sensitivity while maintaining a broad temperature measurement range. Specifically, the absolute sensitivity (S A ) increased from 0.011 % to 0.498 %, representing an approximately 45-fold improvement. These findings indicate that Y 2 O 2 S: Ho 3+ /Yb 3+ UCL materials possess excellent potential for applications in optical temperature sensing.
研究领域:
材料科学
·
光学
·
固体物理
·
发光学
·
温度传感技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Xiaolong Dong,Xin Zhao,Lifan Shen,Maosen Hu,Edwin Yue Bun Pun,Hai Lin
The construction of perovskite-based luminescent systems for multifunctional integrated platforms via reciprocal energy transfer (ET) cascades emerges as a central focus, but the material design and photophysical control remain a significant challenge. Herein, a strong power-dependent quantum yield behavior is observed in Cs 2 NaInCl 6 : Ho 3+ -Yb 3+ (CNIC: Ho-Yb) phosphors with ultra-low phonon energy, and quantified multiphoton upconversion (UC) efficiencies exhibit ultra-linear enhancement with the increasing excitation power, ensuring practical applicability for UC-based temperature sensing. Moreover, an efficient quantum cutting process is unveiled in the CNIC: Ho-Yb, where a single high-energy photon of Ho 3+ is converted into multiple NIR emissions of Yb 3+ via energy redistribution under 453 nm laser excitation, offering significant potential for enhancing near-infrared (NIR) imaging capability in biological tissues. To address the inherent structural and functional limitations of powder-based materials, the CNIC: Ho-Yb/polyacrylonitrile (CNIC: Ho-Yb/PAN) nanofibers are synthesized by electrospinning, and the functional integration platform based on the efficient bidirectional ET is built by coupling 453 and 980 nm lasers to enable selective applications in flexible thermal monitoring and NIR bioimaging. These findings enable next-generation flexible thermometry platforms with higher sensitivity, signal fidelity, and device-level applicability, while also paving the way for non-invasive and high-contrast deep-tissue imaging in biomedical diagnostics.
研究领域:
材料科学
·
光学物理
·
纳米技术
·
生物医学工程
·
发光
·
能量传递
·
传感器
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Z.T. Chen,E.H. Song,M. Wu,S. Ding,S. Ye,Q.Y. Zhang
In contrast to common multiple upconversion (UC) emission characteristic from Ho 3+ , intense single-band red UC emission is realized in perovskite KZnF 3 : Mn 2+ ,Yb 3+ ,Ho 3+ nanocrystals via controlling the doping concentration ratio of Mn 2+ to Ho 3+ . Based on stokes emission, UC luminescence and energy levels of Mn 2+ and Ho 3+ , a bidirectional energy transfer from the 5 S 2 / 5 F 4 state of Ho 3+ to the 4 T 1 ( 4 G) state of Mn 2+ or | F 2 7 / 2 , T 4 1 ( G 4 ) 〉 state of Yb 3+ -Mn 2+ dimer, then to 5 F 5 state of Ho 3+ (ET2) is provided to explain the unique UC emission behaviors of KZnF 3 : Mn 2+ ,Yb 3+ ,Ho 3+ . The effects of dopant concentration on the UC luminescence properties of KZnF 3 : Mn 2+ , Yb 3+ , Ho 3+ is investigated in detail. Analysis of the dominant red UC emission of KZnF 3 : Mn 2+ , Yb 3+ , Ho 3+ under different laser pulse width excitation indicates the energy transfer process . The special temperature dependent UC luminescence for Mn 2+ doped and Mn 2+ freely doped KZnF 3 :Yb 3+ , Ho 3+ further confirm the bidirectional energy transfer mechanism in the UC process. The study of these single-band red UC nanocrystals provides deep insights into the understanding of bidirectional energy transfer in UC mechanism, offering the possibility for applications in biolabels and bioimaging.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）