Materials Research Express
·
2023
·Vol. 10
·期 8
·086201
·
IF 2.3
Bing Liu,Jingheng Liang,Lili Wang,Zian Cheak Tiu
β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals are synthesized by a facile hydrothermal route. The up-conversion (UC) luminescence and photoelectric effects are enhanced simultaneously with the introduction of Zr4+ ions under IR excitation. With the Tm3+ ions fluorescence spectra under 980 nm excitation, the blue and red emissions reached the highest intensity in the case of 4 mol% Zr4+ doping. Taking the advantage of Zr4+ stimulates the free electrons transfer from the valence band (VB) to the conduction band (CB) in β-NaYF4:Yb3+/Tm3+/Zr4+ microcrystals, the photocurrent reached the highest intensity in the case of 4 mol% Zr4+ doping at 780 nm excitation. The β-NaYF4: Yb3+/Tm3+/Zr4+ microcrystals with both enhanced UC luminescence and photoelectric properties are highly potential to contribute in photovoltaic and infrared sensors application.
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 PHYSICS D-APPLIED PHYSICS
·
2020
·Vol. 53
·期 28
·285103
·
IF 3.169
Jingheng Nie,Weitao Ying,Jianmin Gu,Fei Wang,Shiqing Xu,Shimin Liu
Complex logic systems using external excitation sources (1550 nm and 1064 nm lasers) as stimulus inputs and upconversion (UC) emission intensities as the optical outputs signals have been developed by taking advantage of the unique two-wavelength excitation effects. The Er3+ doped β-NaYF4 material that can achieve the emission enhancement via simultaneous dual-wavelength pumping at 1550 and 1064 nm due to the matching energy level. Elementary logic operations (OR, AND, and YES) and integrative logic operations are implemented by observing the change in two visible fluorescence emission bands (green and red) under the near-infrared excitation input conditions. The multiple outputs in our system can generate different logic operations under the same input conditions, which could increase the information content in the logic library and further improve the information processing capability. This logic system that takes infrared excitation as input and visible light as output has broad application prospects in the fields of anti-counterfeiting and information encryption. The results not only provide a deep understanding of the dual-wavelength excitation UC luminescence mechanism, but also offer a useful enlightenment for the development of novel micro/nanostructured materials for photonic devices.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-8
·
IF 5.3
Guo Keyu,Liu Tong,Li Shun,Zhu Daobin,Fan Yuanyuan,Fan Rangrang,Ding Changchun,Jin Wei,Hu Junshan
An upconversion luminescence (UCL) nanoprobe is reported for the rapid detection of hypochlorite ions (ClO − ) in complex environments. The probe is fabricated by sensitizing rhodamine B (RhB) on the surface of core@shell upconversion nanoparticles (C/S UCNPs) with the bridging of polyethylene glycol (PEG) molecules. Under 980 nm excitation, the UCL of C/S UCNPs is quenched by RhB through fluorescence resonance energy transfer (FRET), which can be restored by the oxidative cleavage of RhB induced by ClO − . It is observed that the green emission intensity of RhB-modified C/S UCNPs increases linearly with the concentration of ClO − , enabling quantitative detection of ClO − . Moreover, the excitation of C/S UCNPs requires only a low power density (0.09 W/cm 2 ), which minimizes the photodegradation of RhB and stabilizes the FRET process. Under optimized conditions, the detection limit for ClO − ions in tap water was 5 µg mL⁻ 1 . Graphical abstract
研究领域:
分析化学
·
纳米材料
·
生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Dandan Ju,Feng Song,Yingdong Han,Wenjing Cui,Feifei Song,Lisa Liu,Aihua Zhou,Xueqin Wang,Shujing Liu
Trivalent lanthanide ion (Ln 3+ ) doped UC materials can emit visible light under near-infrared (NIR) excitation due to anti-stokes shift and have received wide attention. In this paper, we presented a new strategy to synthesize the uniform and smooth microstructures (rodlike and tubular) based on hexagonal phase NaYF 4 microcrystals . Moreover, we systematically discussed the method of enhancing the upconversion (UC) luminescence intensity via co-doping the ions with different valences (Li + and Lu 3+ ) in order to tailor the environment around lanthanide ions. The UC intensities in the two microstructures were significantly improved. The results suggested the great application potential of tubes and rods of β-NaYF 4 microcrystals in anti-counterfeiting, laser media, photonic crystals , and waveguides .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2012
·Vol. 9
·期 11
·1929-1938
·
IF 8.349
Gan Tian,Wenlu Ren,Liang Yan,Shan Jian,Zhanjun Gu,Liangjun Zhou,Shan Jin,Wenyan Yin,Shoujian Li,Yuliang Zhao
Upconverting nanoparticles (UCNPs) have attracted considerable attention as potential photosensitizer carriers for photodynamic therapy (PDT) in deep tissues. In this work, a new and efficient NIR photosensitizing nanoplatform for PDT based on red-emitting UCNPs is designed. The red emission band matches well with the efficient absorption bands of the widely used commercially available photosensitizers (Ps), benefiting the fluorescence resonance energy transfer (FRET) from UCNPs to the attached photosensitizers and thus efficiently activating them to generate cytotoxic singlet oxygen. Three commonly used photosensitizers, including chlorine e6 (Ce6), zinc phthalocyanine (ZnPc) and methylene blue (MB), are loaded onto the alpha-cyclodextrin-modified UCNPs to form Ps@UCNPs complexes that efficiently produce singlet oxygen to kill cancer cells under 980 nm near-infrared excitation. Moreover, two different kinds of drugs are co-loaded onto these nanoparticles: chemotherapy drug doxorubicin and PDT agent Ce6. The combinational therapy based on doxorubicin (DOX)-induced chemotherapy and Ce6-triggered PDT exhibits higher therapeutic efficacy relative to the individual means for cancer therapy in vitro.
研究领域:
生物医学工程
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
LUMINESCENCE
·
2020
·Vol. 36
·期 1
·110-116
·
IF 1.855
Xueping Yang,Yunchun Liu,Hongqi Chen,Lun Wang
Many sulfides are toxic substances that easily harm the respiratory tract, therefore affecting respiratory function or damaging other organs of the body, leading to its failure. Therefore, there is a pressing need to develop methods for sensitive detection of sulfur ions (S 2− ). Based on luminescence resonance energy transfer (LRET) theory, we report the construction of a near-infrared (NIR) excitation luminescence probe using NaGdF 4 :Yb 3+ ,Er 3+ @NaYF 4 upconversion nanoparticles (UCNPs) as the donor and dye-670 as the receptor for detection of S 2− . When UCNPs and dye-670 molecules were combined using ligand exchange and electrostatic attraction, LRET occurred and UCNP luminescence was quenched. When S 2− was added to the system, sulfide ions were able to destroy the double bond of the dye, inhibiting LRET and restoring UCNP luminescence. Under optimum condition, the linear range of S 2− detection was 0.65–18.2 μM, and the detection limit was 34.2 nM. This method was applied for determination of S 2− in water with satisfactory results.
研究领域:
分析化学
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环境科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Lulu Qiu,Baosheng Cao,Yujie Weng,Qianrui Liu,Yufeng Li,Shaowen Wang,Wenna Zhao,Yangyang He,Bin Dong
The harmonic generation effect, a distinct nonlinear optical phenomenon , exhibits unique properties and has critical applications across multiple fields. However, harmonic generation during optical measurements can introduce significant interference or experimental errors. Here, we investigated the photoluminescence (PL) characteristics of Dy 3+ doped CaWO 4 phosphors under near-infrared (NIR) irradiation. Both characteristic yellow and blue emissions of Dy 3+ and a series of NIR-induced harmonic generation were observed. The study demonstrated that Dy 3+ emissions were excited by harmonic generation originating from the dual-grating configuration of a spectrophotometer. Leveraging the divergent temperature-dependent intensity evolution between Dy 3+ emissions and 1.5th harmonic generation, we proposed a novel ratiometric thermometric strategy based on the luminescence intensity ratio (LIR). This new thermometry achieved optimal temperature sensitivity, with a maximum absolute sensitivity of 74.57 × 10 −4 K −1 and relative sensitivity of 2.21 % K −1 , surpassing conventional ratiometric thermometry relying on thermally coupled energy levels. These findings not only clarified the origin of multiplex harmonic generation and its impact on spectral measurement but also harness harmonic generation for innovative applications in optical thermometry.
研究领域:
光学材料
·
生物医学工程
·
分子成像
·
热疗监测
·
非线性光学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Xiaohui Kang,Lanpeng Zhang,Wei Jia,Liang Yang,Changlong Jiang
Methylglyoxal is considered a key indicator in evaluating wine flavor and quality, as well as an important marker for diabetic pathological syndromes. Rapid and accurate quantitative detection of methylglyoxal is essential in scenarios of wine production standards and human health monitoring. Herein, we report a visual method for detecting methylglyoxal via an NIR-excitable reversible ratiometric fluorescent hydrogel sensor, where NIR-excited upconversion nanoparticles serve as energy donors and eosin B acts as the energy acceptor, together forming an integrated ratiometric nanophotonic probe that ensures the accuracy of detection without being affected by various background fluorescence interference in different scenarios. The integrated optical probe is combined with a 3D network hydrogel to design a sensing patch that can be easily regenerated through simple treatment, exhibiting a distinct optical color response. Upon the addition of methylglyoxal, the G/R value of the sensing patch changes, enabling the real-time quantitative detection of methylglyoxal. Additionally, we combined the hydrogel sensing patch with a smartphone to create a portable sensing platform for the convenient visual detection of methylglyoxal. The probe and hydrogel sensing patch have detection limits for methylglyoxal as low as 59 and 75.4 nM, respectively. The portable sensing patch designed here provides an effective strategy for standardizing the wine production process and monitoring patient health.
研究领域:
生物化学
·
医学检测
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2015
·
IF 2.259
Xiaowen Zhang,Zhi Chen,Jianrong Qiu
Near infrared to visible up-conversion luminescence in Er 3+ single doped BaCl 2 , BaF 2 and NaYF 4 phosphors were compared. Intense blue emission at 410 nm due to 2 H 9/2 → 4 I 15/2 transition and greenish-blue emission at 496 nm due to 4 F 7/2 → 4 I 15/2 transition were only observed in BaCl 2 :Er 3+ when excited by 808 nm and 976 nm laser diodes , respectively. The phenomena can be ascribed to the direct two-step excitation processes which occur in the chlorides where multiphonon relaxation is rapidly suppressed. In addition, the intensity of upconversion emission in BaCl 2 :Er 3+ is greatly enhanced upon broadband near-infrared excitation.
研究领域:
材料科学
·
光学材料
·
无机化学
·
发光物理
·
纳米生物技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Zuodong Liu,Chengwei Zhang,Qiyue Pan,Guo Zhang,Tingting Xiong,Rui Liu,Yongsheng Yu,Peng Liu,Qiangshan Jing
Er, Y:CaF 2 particles were synthesized using the chemical precipitation method, and as-synthesized particles were calcined at different temperatures. Fourier-transform infrared spectra confirmed the elimination of residual nitrates from Er, Y:CaF 2 phosphors calcined at 600 °C. Measurements revealed that the calcined Er, Y:CaF 2 phosphors displayed a single cubic-fluorite crystal structure with regular polygon shapes. We investigated the sensitivity effects of introducing non-active Y 3+ ions as buffers on the luminescence characteristics of Er, Y:CaF 2 phosphors under 488 nm and 980 nm excitation. Two emission bands were detected in luminescence spectra. For phosphors under 980 nm excitation, a three-photon UC mechanism is identified to be involved in the generation of green and red emissions. The findings provide insights into enhancing the 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transitions in Er, Y:CaF 2 phosphors by introducing Y 3+ ions as buffers.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Caixia Song,Renguang Ye,Youjie Hua,Xuejiao Wang,Tianzhi Jiang,Juan Wang,Luping Lyu,Junhao Wu,Hongping Ma,Chenxia Li,Degang Deng,Shiqing Xu
In this study, three types of Er 3+ /Yb 3+ ion co-doped La 2 O 3 (LO), La 2 O 2 S (LOS), and La 2 O 2 SO 4 (LOSO) up-conversion phosphors with identical morphology and size were successfully synthesized using a homogeneous precipitation method combined with a sulfurization process. The research compares the up-conversion luminescence (UCL) properties of these three phosphors under 980 nm near-infrared excitation. It evaluates their optical temperature sensing performance based on the fluorescence intensity ratio (FIR), while also proposing their luminescence mechanisms. In addition, the phonon energy of the three matrices was determined using FT-IR and Raman spectroscopy, and the influence of the phonon energy on the sensitivity of the up-conversion (UC) non-contact thermometer was discussed. The results indicate that the UCL of the LOS system is the strongest among the three different matrix systems. Notably, when examining the thermosensitive behavior based on the thermally coupled levels (TCLs) ( 2 H 11/2 / 4 S 3/2 ), it was found that the maximum absolute sensitivity (S a-max ) of the three samples followed the trend: LOSO (0.00811 K -1 ) > LOS (0.00627 K -1 ) > LO (0.00607 K -1 ); this trend is consistent with the degree of matching (MD) between their phonon energies and energy gaps (ΔE). These findings provide valuable insights for selecting appropriate host materials with the desired thermometric capabilities and offer guidance for enhancing the thermometric performance of non-contact thermometers.
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产品关联
DOI
高影响因子
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