JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Guangliang Lu,Yiping Zhang,Jianlian Song,Yuhan Jing,Xingyu Li,Rao Qin,Da Biao Zhai,Jiangang Jiang,Yiping Wang,He Wang
Traditional methods for latent fingerprint (LFP) detection often suffer from insufficient contrast and background interference, limiting their effectiveness in forensic applications, particularly in complex environments. This study introduces an innovative approach that combines Fe 3+ -doped NaYF 4 :Yb, Er upconversion nanoparticles (UCNPs) with digital image processing technology. By optimizing the Fe 3+ doping concentration (15 % mmol) and synthesis temperature (220 °C), the red emission intensity at 655 nm was enhanced by 13.96 times compared to undoped samples. The amplified red emission originates from energy transfer of | 2 F 7/2 , 4 T 1g ⟩ (Yb 3+ -Fe 3+ dimer) to 4 F 9/2 (Er 3+ ) states, coupled with crystalline field symmetry distortion induced by Fe 3+ codoping. Dynamic studies of 4 S 3/2 and 4 F 9/2 states under 980 nm pulsed laser excitation, alongside diffuse reflectance analysis, corroborate the proposed upconversion mechanism. Additionally, The optimized UCNPs demonstrated high biocompatibility and stability, achieving LFP visualization with contrast ratios up to 85.03 % and structural similarity scores exceeding 91.58 % via MATLAB-based digital image processing, a significant improvement over conventional methods. This work establishes a robust, non-toxic LFP detection system with potential applications in forensic science.
研究领域:
材料科学
·
法医学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2019
·
IF 2.846
Guofang Zhang,Yiming Li,Xin Zhao,Jianyi Xu,Yanghuan Zhang
Fe 3+ and Zn 2+ ions were doped into the lattice of CeO 2 via the hydrothermal method . The microstructure and spectra features were analyzed systemically. XRD results show that the solid solubility of Fe 3+ and Zn 2+ ions in Ce 1– x (Fe 0.5 Zn 0.5 ) x O 2 can be identified as x = 0.16. The cell volumes are decreased by increasing the doped content. The TEM graphs prove that the grain size of the sample is about 10 nm, and the EDS result indicates that the doped contents are in accordance with that of the theory concentrations. Meanwhile, the doping also causes the increasing concentrations of the defects and oxygen vacancies which are supported by the XPS , Raman, UV and PL characterizations. The samples exhibit better catalytic activities for improving the hydrogen storage properties and the electrochemical kinetics of the ball milled Mg 2 Ni based composites. Further, the catalysis effects are improved by increasing the doped contents, which can be ascribed to the increasing contents of the oxygen vacancies, defects, the special electron transition states and the nature of the doped ions in CeO 2 -based solid solutions.
研究领域:
材料科学
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催化化学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Yong Liu,Jia Li,Jiayao Li,Xiaohui Yan,Fudong Wang,Wenning Yang,Dickon H.L. Ng,Jie Yang
The development of new nanomaterials for the highly efficient wastewater treatment has been one of the hot scientific researches. Herein, we report a novel 3D Fe 3+ -doped BiOBr-based magnetic Janus micromotors with superior solar photo-Fenton catalytic activity for organic pollutant degradation. Taking advantage of hydrogen peroxide as reagent and fuel, Fe 3+ -doped BiOBr based Janus micromotors exhibited extremely high efficiency for methylene blue degradation in a solar photo-Fenton system even at mild pH conditions , which was almost 4 times than BiOBr. The speed of the Janus micromotors could reach 214.7 ± 19.4 μm s −1 in a 5% H 2 O 2 solution. Factors influencing the solar photo-Fenton reaction including Fe 3+ -doping amount, pH, concentration of H 2 O 2 , self-propelled movement as well as mechanical stirring were investigated to clarify the degradation mechanism . Nearly 97% of methylene blue was degraded by Fe 0.11 Bi 0.89 OBr/Fe 3 O 4 /Mn 3 O 4 Janus micromotors in the presence of 3% H 2 O 2 solution at neutral environment within 50 min. This study provided a new insight into the preparation of Janus micromotors for water purification applications based on solar photo-Fenton reaction.
研究领域:
环境科学
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纳米材料科学
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催化化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Bing Zhang,Hongyun Meng,Xue Wang,Jing Li,Honghong Chang,Wenlong Wei
Herein we designed a novel photoelectrochemical sensing platform based on Fe 3+ doped ZnO-Ag photocatalyst (Fe 3+ /ZnO-Ag) for ultrasensitive Hg 2+ detection by using exonuclease III-assisted target recycling and DNAzyme-catalyzed amplification. Firstly, Fe 3+ /ZnO-Ag was synthesized to provide photocurrent under visible light irradiation. Secondly, target Hg 2+ was determined by hairpin DNA probes on the Fe 3+ /ZnO-Ag modified ITO based on T-Hg 2+ -T, and then Hg 2+ was released by the digestion of exonuclease III to double-stranded DNA. Finally, the photocurrent markedly decreased due to catalysis of hemin/G-quadruplex toward 4-chloro-1-naphthol. Under optimal conditions, the photocurrents were linearly related to Hg 2+ concentrations form 0. 5 nM to 100 nM with a detection limit of 0. 1 nM at the 3 S blank criterion. More importantly, the developed biosensor exhibited good selectivity, repeatability, and stability, meanwhile, this analysis platform held great potential for testing real water samples in future.
研究领域:
环境科学
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分析化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 1
·2101669
·
IF 9.926
Zhihao Zhou,Shuai Zhang,Yakun Le,Hong Ming,Yang Li,Shi Ye,Mingying Peng,Jianrong Qiu,Guoping Dong
Spinel configuration is a kind of broadly considered host candidate when designing persistent luminescence (PersL) materials due to the easy generation of vacancies and anti-site defects. Here, a new strategy of defect enrichment for the activation of PersL is proposed, and in contrast to the spinel configuration, it is demonstrated that the crystal structure of near inverse spinel ensures more numerous defects to activate the near-infrared (NIR) PersL of Fe 3+ . Fe 3+ -doped MgGa 2 O 4 displays the PersL band in the range of 600 to 900 nm and possesses a super-long PersL duration time >15 h. The optical analysis and the calculation of density functional theory unravel that the near inverse spinel structure can lower the carrier transfer barriers to accelerate the formation of carrier trap states within the bandgap. Therefore, more numerous defects in this structure may participate in the trapping and de-trapping process by comparison with the normal spinel configuration. These findings are expected to accelerate the development of new PersL materials through Fe 3+ doping toward versatile biological applications in NIR window.
研究领域:
材料科学
·
光学物理
·
生物医学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2025
·
IF 4.9
Guangli Li,Nayu Chen,Tanmiao Xu,Youmei Zhang
Herein, a novel Fe 3+ -doped gelatin/poly(acrylate-co-acrylamide)(GPFe) ionically conductive hydrogels were fabricated using a simple and mild route. The GPFe hydrogel exhibited satisfactory mechanical strength, antifatigue, self-recovery, moisture-retention, anti-swelling, and electronic properties. As a result, the GPFe hydrogels were used as saline-permeable materials to fabricate semi-dry electrodes for detecting subtle electrophysiological signals such as electroencephalogram, electrocardiogram, and electromyogram. The proposed hydrogel semi-dry electrode demonstrated a relatively low and stable electrode-scalp impedance (17.8 ± 3.69 kΩ at 10 Hz) and could capture expected neuroelectrophysiological responses with similar signal patterns and amplitudes to the golden standard wet electrodes. The grand average temporal correlation coefficients between semi-dry/wet electrodes for eyes closed/open and steady-state visual evoked potential paradigms were 0.92 ± 0.36 and 0.93 ± 0.24, respectively, confirming the feasibility on real-life brain-computer interfaces. More importantly, the hydrogel semi-dry electrode overcame the dilemma that existing wet and dry electrodes cannot balance signal quality and user friendliness. In addition, the GPFe hydrogel-based detector could distinguish between different types and concentrations of salt solutions and used as efficient electrolyte to construct flexible supercapacitors. The hydrogel-based supercapacitors showed high surface capacitance (6.25 mF cm 2 ) and maintained a good capacitance retention percentage (92.5 %) after 2000 charge-discharge cycles. Overall, the GPFe hydrogel system integrate multi-functional sensing and flexible power source, which provides valuable technical support for self-powered multi-functional wearable sensor system.
研究领域:
材料科学
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生物医学工程
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柔性电子
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神经接口
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Xuewan Lin,Jiyou Zhong
Near-infrared (NIR) phosphors are key components for NIR phosphor-converted light-emitting diodes (pc-LEDs), which serve as compact light sources for a range of smart spectroscopic applications. However, developing an efficient, low-cost, and broadband NIR phosphor with a long-wavelength emission peak beyond 900 nm remains a considerable challenge. Guided by design principles summarized here, we selected the double-perovskite Ca2MgTeO6 as a host for Fe3+ doping. Systematic analysis of the crystal and electronic structures reveals the crystal’s strong potential for generating efficient NIR luminescence. Experimental results confirm that the optimally doped sample exhibits NIR emission centered at 944 nm and achieves a remarkably high photoluminescence quantum yield (PLQY) of 87.8% under 310 nm excitation. Finally, the developed material was successfully applied in nondestructive testing, night vision, and information encryption, realizing multifunctional applications.
研究领域:
材料科学
·
光学材料
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固态照明
·
发光学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）