JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Tongshu Zhang,Yuheng Zhang,Fulong Hao,Huidong Xie,Zhihua Leng,Zuobin Tang
The development of highly efficient and thermally stable phosphors with ultra-broadband emission is critical to advancing the practical applications of portable near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs). Herein, we employ the chemical unit co-substitution strategy to quantitatively introduce Mg 2+ and Si 4+ ions into the garnet lattice, yielding the high-performance Lu 3 Ga 3 MgSiO 12 :Cr 3+ (LGMSO:Cr 3+ ) phosphor, which exhibits an ultra-broadband emission with a full width at half maximum (FWHM) of 181 nm and a photoluminescence quantum yield (PLQY) of 63.7 %. Structural analysis reveals that Mg 2+ -Si 4+ co-substitution induces multiple Cr 3+ occupancy within distorted (Ga/Mg)O 6 octahedra, broadening emission band via a multisite-induced effect, as confirmed by low-temperature spectral analysis (80 K) and crystal field calculations. Furthermore, co-doping with Yb 3+ enhances the emission bandwidth and thermal stability (from 48.4 % to 71.0 % at 423 K), attributed to the combined contributions of Cr 3+ emission ( 4 T 2 ( 4 F ) → 4 A 2 ) and Yb 3+ emission ( 2 F 5 / 2 → 2 F 7 / 2 ) excited via Cr 3+ energy transfer. Packaged LED devices show superior night vision and non-destructive biological penetration capabilities, highlighting the phosphor’s potential for NIR pc-LED applications.
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Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 10
·1479-1488
·
IF 4.776
Dong-Dong Zhang,Jing-Min Liu,Nan Song,Yao-Yao Liu,Meng Dang,Guo-Zhen Fang,Shuo Wang
Infection by pathogens has always been a major threat to human health, and various drugs have been explored and designed to kill pathogens in the past decades. However, pathogens are evolving faster than the development of new antibiotics, and increasing doses are resulting in increasing side effects and toxicity; this has prompted us to exert effort toward the development of advanced drug carriers for precise delivery of antibiotics. In this study, with the involvement of persistent luminescence nanophosphors (PLNPs) as the emission core, we propose an antibiotic nanocarrier for in vivo delivery of vancomycin to intestinal bacteria via bioimaging guidance. The synthesized PLNPs were coated with mesoporous silica for vancomycin adsorption (NPs@SiO2@Van) and used as an efficient nanocarrier for direct vancomycin delivery and in vivo imaging with low cytotoxicity toward MC38 cell lines. Additionally, we detected the luminescence signals of NPs@SiO2@Van during their use as nanocarriers for vancomycin and accurately obtained the biodistribution of NPs@SiO2@Van in situ and in real time with neglectable auto-fluorescence from the animal body. For the first time, bioimaging-guided in vivo drug delivery to gut bacteria was realized in the present work. The outstanding luminescence features and excellent biocompatibility and structural stability of PLNPs may open new horizons in the development of nanocarriers for nano-diagnosis/therapy and in vivo studies of intestinal microorganisms.
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Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 9
·2718-2725
·
IF 6.1
Song Qing,Jing Wan,Tao Yang,Qiang Zhou,Yayun Zhou,Zhengliang Wang,Dawei Wen,Mingmei Wu
The exploration of high-performance near-infrared phosphors has attracted widespread attention. In this work, a brand new Rb2LiAlF6:Cr3+ (denoted as RLAF:Cr) phosphor has been constructed by the substitution of Al3+ ions with Cr3+ ions. Evidence shows that two sets of near-infrared emission bands, which originated from two types of Cr3+ sites, were observed upon blue light excitation. These emission bands merged into a wide emission band locating in the region of 650 nm–1050 nm, with a full width at half maximum (FWHM) of 125 nm. In addition, a high quantum efficiency of 77.7% and an excellent thermal stability at 417 K, with a retention rate of 90.5% of that at room temperature (RT), were witnessed. Profiting from the luminescence properties of the NIR phosphor, clear images of biological tissues and human palm veins were obtained using a light-emitting diode (LED) as a lighting source, which was constructed using an RLAF:Cr phosphor and a blue InGaN chip. These images showed the large potential of the RLAF:Cr phosphor for night vision and bioimaging in LED devices.
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Laser & Photonics Reviews
·
2026
·
IF 9.7
Dawei Wen,Haoyuan Weng,Bin Xiao,Pan Wang,Ruijing Fu,Zhiwei Ma,Qingguang Zeng,Guanjun Xiao
Luminescence pressure sensors, valued for their remote sensing capability and high resolution, have been developed recently. However, most current sensors rely on a linear relationship between an optical property and pressure. We propose a nonlinear machine learning (ML) method to model the luminescence intensity ratio (LIR) as a function of pressure. The versatility and performance of this method are demonstrated using (Y,Gd)(Al,Ga) 3 (BO 3 ) 4 :Cr 3+ phosphors as luminescent pressure sensors. The relative sensitivities of the 2 E → 4 A 2 / 4 T 2 → 4 A 2 LIRs in (Y,Gd)(Al,Ga) 3 (BO 3 ) 4 :Cr 3+ range from 1.58%/GPa to 25.27%/GPa. The ML fitting demonstrates a superior performance compared to linear fitting, with lower mean absolute errors (0.0355–0.1499 GPa vs. 0.1209–0.6955 GPa) and higher R 2 values (99.70–99.98% vs. 93.69–99.79%). The ML fitting method is more suitable for modeling the nonlinear relationships between LIR and pressure than traditional linear fitting. The nonlinear ML fitting approach offers a powerful new way to model the relationships between luminescence features and various physical parameters.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 6
·399
·
IF 5.4
Zhao Zewei,Huang Rui,Chen Yafei,Zhang Suni,Wei Xiaoping,Li Jianping,Wei XP,Li JP
A self-powered molecularly imprinted photoelectrochemical sensor was developed based on metal-complex imprinting for the determination of Cr 3+ in injection solutions. AgInS 2 /Ti 3 C 2 and CuInS 2 /Ti 3 C 2 Schottky heterojunction photoelectric materials were synthesized and used as the photoanode and photocathode, respectively. The complex formed by Cr 3+ and 8-hydroxyquinoline(Ox) (Cr-Ox) was used as a template molecule to prepare a molecularly imprinted polymer(MIP) film on the CuInS 2 /Ti 3 C 2 photocathode, constructing a dual-Schottky junction self-powered molecularly imprinted photoelectrochemical sensor for the first time. After being specifically recognized and adsorbed by the MIP, Cr-Ox exerts three synergistic effects. First, Cr-Ox acts as an electron trap, capturing photogenerated electrons and promoting charge carrier recombination, i.e. an electron trapping effect. Second, the cation exchange between Cr 3+ and Cu 2+ on the CuInS 2 photocathode surface generates photoinert Cu-Ox, leading to the cation exchange-induced passivation effect. Third, the physical blockage of incident light by Cr-Ox located within the imprinted cavities produces a light-blocking effect. The synergy of these three effects causes a sharp decrease in photocurrent. Taking advantage of this signal change, indirect determination of Cr 3+ was achieved with a detection limit of 7.64 × 10 –14 mol/L, demonstrating significantly higher sensitivity compared to other Cr 3+ detection methods. Furthermore, the selectivity of the sensor was improved by the MIP film, eliminating interference from common metal ions. The sensor has been applied to the determination of trace Cr 3+ in injection samples. Graphical The alternative text for this image may have been generated using AI.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qiuyu Chen,Jin Liu,Bo Zhao,Xiaoyan Meng,Yu He,Zian Lin
A stable Cu-based MCOFs with outstanding laccase-mimicking nanozyme activity was synthesized. • Steady-state kinetic assays verify the superior substrate affinity and faster catalytic rate of Cu₃-TAPT COF. • A two signal-reading-mode colorimetric sensor was constructed for detection of Cr 3+ and Al 3+ . • The sensing platform can be successfully applied for real water samples. Cr 3+ and Al 3+ are toxic metal ions widely existing in environmental water, and traditional detection methods cannot meet the demand for on-site analysis. Metal covalent organic frameworks (MCOFs) are promising nanozyme candidates, which overcome the defects of conventional nanozymes by virtue of ordered structure, good stability and uniformly distributed active sites. In this study, Cu 3 -TAPT COF, a typical MCOF nanozyme with high stability and excellent laccase-mimicking activity was fabricated. Relying on the differential inhibitory effects of Cr 3+ and Al 3+ on its catalytic activity, an inhibition-based colorimetric platform was established for their separate detection. This sensing system integrates naked-eye visible color variation, quantitative absorbance signal at 510 nm, and smartphone image capture for portable on-site readout. The method validation results demonstrated that the limits of detection (LODs) were 0.30 μM for Cr 3+ and 0.22 μM for Al 3+ . The overall recoveries of all spiked groups for the two ions in three actual water samples (river water, seawater, and lake water) ranged from 93.41% to 109.8%. This work validates the great potential of laccase-mimicking MCOF nanozymes in environmental monitoring and sheds new light on the fabrication and practical exploitation of MCOF-derived nanozymes. Download: Download high-res image (116KB) Download: Download full-size image
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JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Bingkai Gao,Lei Zhang,Runqiu Peng,Panlai Li,Qian Wu,Zhijun Wang
The exploration of performance luminescence near-infrared (NIR) material is crucial for rapidly developing NIR spectroscopic techniques. Herein, the NIR LaMg 0.5 Sn 0.5 O 3 :Cr 3+ phosphor was synthesized by a high temperature solid-state method. And its luminescence performance were improved by [In 3+ -Sc 3+ ] substituting for [Mg 2+ -Sn 4+ ]. The half-peak width can be expanded to 211 nm, the emission intensity can reach the seven times of that un-substitution, and the emission intensity at 423 K was maintained at 60 % of that at room temperature , moreover, the internal quantum efficiency can reach 54.2 %. On this basis, the phosphor converted light emitting diodes ( pc -LEDs) were achieved by combining La(Mg 1-x Sn 1-x In x Sc x ) 0.5 O 3 :Cr 3+ with blue LED, importantly, it can be applied to the biodetection and night vision lighting, which indicate its application value.
研究领域:
材料科学
·
生物医学工程
·
光学材料
·
分子影像
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转化医学
·
光电子学
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shihai Miao,Yanjie Liang,Ruiqi Shi,Weili Wang,Yongfu Li,Xiao-Jun Wang
Blue InGaN chip-pumped short-wave infrared (SWIR) emitters have aroused tremendous attention and shown emerging applications in diverse fields such as healthcare, retail, and agriculture. However, discovering blue light-emitting diode (LED)-pumped SWIR phosphors with a central emission wavelength over 1000 nm remains a significant challenge. Herein, we demonstrate the efficient broadband SWIR luminescence of Ni2+ by simultaneously incorporating Cr3+ and Ni2+ ions into the MgGa2O4 lattice, with Cr3+ as the sensitizer and Ni2+ as the emitter. Because of the strong blue light absorption of Cr3+ and high energy transfer efficiency to Ni2+, the obtained MgGa2O4:Cr3+, Ni2+ phosphors show intense SWIR luminescence with a peak wavelength at 1260 nm and a full width at half maximum (FWHM) of 222 nm under the excitation of blue light. The optimized SWIR phosphor presents an ultra-high SWIR photoluminescence quantum efficiency of 96.5% and outstanding luminescence thermal stability (67.9%@150 °C). A SWIR light source has been fabricated through a combination of the prepared MgGa2O4:Cr3+, Ni2+ phosphor and a commercial 450 nm blue LED chip, delivering a maximum SWIR radiant power of 14.9 mW at 150 mA input current. This work not only demonstrates the feasibility of developing broadband high-power SWIR emitters using converter technology but also presents new insights into the importance of SWIR technology.
研究领域:
材料科学
·
光电子学
·
固态照明
·
光子学
·
红外发射
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TALANTA
·
2019
·
IF 4.916
Can Chen,Fenghua Geng,Yongxiang Wang,Haidong Yu,Lin Li,Sheng Yang,Jinhua Liu,Wei Huang
The present work constructs a sequentially triggered nanoswitch (STN) for sequential detection of Cr 3+ , P 2 O 7 4− (PPi) and alkaline phosphatase (ALP) depending on polythymine (T40) templated fluorescent Cu nanoparticles (Cu NPs). A significant phenomenon is that Cr 3+ can only causing 5% QE of fluorescent Cu NPs synthesized by lower than 500 μM Cu 2+ , but the fluorescence of the Cu NPs synthesized by more than 500 μM Cu 2+ can be quenched up to 90% QE by the same concentration of Cr 3+ . Then the quenched fluorescence of CuNP-Cr 3+ complex provides a sensing platform for PPi due to the strong binding between Cr 3+ and PPi, resulting in dissociation of Cr 3+ from the surface of Cu NPs and the recovery of fluorescence emission . Further ALP hydrolysis of PPi disrupts Cr 3+ -PPi assemble and Cr 3+ is released to interact with Cu NPs, which induces fluorescence quenching again. Thus, sequentially detection of Cr 3+ (LOD, 0.03 μM), PPi (LOD, 0.005 μM) and ALP (LOD, 0.125 mU/mL) was successfully implemented with high sensitivity and selectivity. The sensor is also successfully used for Cr 3+ , PPi and ALP assays in the human serum. Additionally, the sensitive “on-off-on-off” sensing behavior of the Cu NPs allow three chemical inputs (Cr 3+ , PPi and ALP) to construct a logic gate.
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JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Jiantong Wang,Changshuai Gong,Sihan Yang,Qi Zhu,Xuejiao Wang,Ji-Guang Li
Phosphor-converted near-infrared light-emitting diodes (NIR pc-LEDs) are finding applications in various fields including food quality analysis, biomedical imaging, night vision, and biomedicine. The crucial factor in the development of NIR pc-LEDs devices lies in the advancement of high-performance broadband NIR phosphors. In this work, novel Cr 3+ -activated silicate phosphors NaRESi 3 O 9 (RE = Y, Lu, Sc) are reported. This silicate has a special 3D network structure in which RE has four different sites, forming four octahedrons and providing suitable occupation sites for Cr 3+ . The phosphors demonstrate a wide emission spectrum ranging from 750 to 1450 nm when excited by light at 468 nm. The full width at half maximum (FWHM), which benefits from the presence of Cr 3+ ions occupying multiple sites, is measured to be 203 nm. Notably, the strongest emission peak is observed at a longer wavelength of 984 nm compared to most other systems activated by Cr 3+ . The Na 3 ScSi 3 O 9 lattice provides a weak crystal field ( Dq / B = 1.97) and weak phonon-photon coupling for Cr 3+ , and the integrated emission intensity of Na 3 ScSi 3 O 9 :0.03Cr 3+ is 4.66 times stronger than that of Na 3 YSi 3 O 9 :0.03Cr 3+ .
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Materials Research Express
·
2023
·Vol. 10
·期 11
·116202
·
IF 2.3
Yifan Yang,Yongqi Zhu,Shuang Wu,Xinyue Li,Qinan Mao,Yifan Chen,Jiasong Zhong,Yiwen Zhu
In this study, a series of near-infrared (NIR) KZnF3:Cr3+ phosphors was prepared by different chromium sources using a HF-free hydrothermal method. The influence of different chromium sources on the crystal structure, morphology, and luminescence properties of Cr3+-doped KZnF3 phosphors were systematically investigated. The results showed that the chromium source changed from CrF3·xH2O to (NH4)3CrF6 and leaded to an increased crystal field, resulting in a blue shift of the emission peak position from 803 nm to 753 nm, accompanied by the full-width half maximum (FWHM) reduced from 140 nm to 122 nm. Moreover, KZnF3:0.03Cr3+ (CrF3·xH2O) and KZnF3:0.03Cr3+ ((NH4)3CrF6) phosphors maintained 58% and 87% of their initial room-temperature intensity at 423 K, respectively. These results indicated that altering the synthetic raw materials provided new insights for designing NIR phosphors with highly thermal stability.
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Nanoscale
·
2020
·Vol. 12
·期 26
·14180-14187
·
IF 6.895
Luyan Wu,Jie Hu,Qilin Zou,Yaling Lin,Decai Huang,Dejian Chen,Hongyu Lu,Haomiao Zhu
Persistent luminescence nanophosphors (PLNPs) emitting in the second near-infrared window (1000–1700 nm, NIR-II) are emerging as one promising class of in vivo bio-imaging agents due to their unique advantages including non-autofluorescence and low optical scattering in tissues. Currently, it remains a great challenge to synthesize nanosized lanthanide-doped inorganic NIR-II phosphors with a good persistent luminescence performance. Herein, we present a salt microemulsion method for synthesizing Ce3+, Cr3+, Nd3+ codoped Y3(Al/Ga)5O12 nanocrystals, which generate multi-wavelength persistent luminescence in the visible (∼508 nm, 5d1 → 4f of Ce3+), the first near-infrared window (∼890 nm, 4F3/2 → 4I9/2 of Nd3+) and NIR-II (∼1063 nm, 4F3/2 → 4I11/2 of Nd3+) regions. Under illumination of a 410 nm diode (3 W) for 10 min, the observed duration time of NIR-II persistent luminescence is as long as 60 min at room temperature. Moreover, the persistent luminescence can be excited efficiently by multiple excitation sources including a blue diode, white LEDs and an X-ray generator, which is crucial for deep tissue imaging applications. By comparing the penetration depth between NIR-I and NIR-II persistent luminescence through chicken breast, we prove that NIR-II photons exhibit a deeper optical penetration length (3.9 mm) than that of the NIR-I ones (2.5 mm). In addition, the NIR signals can still be detected 3 min after ceasing the excitation source by a small animal imaging system (InGaAs detector) when the thickness of the covering chicken breast is 20 mm. These results show great promise for Y3(Al/Ga)5O12:Ce3+,Cr3+,Nd3+ nanocrystals as a PLNP for bio-imaging applications with deep penetration depth and a high signal-to-noise ratio.
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