Journal of Computational Methods in Sciences and Engineering
·
2018
·Vol. 18
·期 2
·445-458
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IF 0
Ji Xianbiao,Mi Hong,Yang Fan,Shao Zheping,Pan Jiacai
This paper proposes the cost evaluation model for the existing TB-tree insertion algorithm called BASEINSERT. Factors that may affect its performance are analyzed in a detailed manner. While we search the latest node, the number of nodes being accessed is very prominent. Given this property, the paper comes up with an improved algorithm, named IMPRINSERT by adding the cache structures of root-latest-node path and right-most path, which reduce the number of nodes being accessed while searching for the latest node and right-most path close to zero. Under the bulk data setting, algorithm that inserts the data segment by segment is fairly inefficient, therefore this paper introduces a new insertion algorithm, called BULKINSERT and its cost evaluation model is proposed as well. Verified by a large number of synthesized datasets, it is proved that the cost models are reliable, both IMPRINSERT and BULKINSERT are effective and demonstrate nearly linear scalability.
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JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Haoran Zhou,Linwen Jiang,Xin Chen,Anhua Wu,Zhuo Tang,Hongbing Chen
The color-tunable GdCaAl 3 O 7 : RE 3+ (RE = Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. The X-ray diffraction patterns confirmed the forming of GdCaAl 3 O 7 tetragonal phase, and the scanning electron microscopy images indicated that the obtained products presented honeycomb-like structure due to the gas releasing during the auto-combustion process. The luminescent properties, concentration quenching mechanism, energy transfer mechanism, luminescent dynamics, thermal stability and product practicability of GdCaAl 3 O 7 : RE 3+ (RE = Tb, Eu, Eu@Tb) phosphors were investigated systematically. All the GdCaAl 3 O 7 : RE 3+ products presented the characteristic emission of doped RE 3+ . Using GdCaAl 3 O 7 : 50% Tb 3+ @3.0% Eu 3+ as yellow-emitting phosphors in combination with commercial BAM: Eu 2+ blue-emitting phosphors and a NUV chip can successfully package a warm white LED device with high color rendering index (CRI, 86.3) and low correlated color temperature (CCT, 3348 K) that was very suitable for near-ultraviolet light-triggered indoor illumination.
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BIOSENSORS & BIOELECTRONICS
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2024
·
IF 10.7
Haomin Fu,Zhiyuan Xu,Zhou Yang,Jianping Lei
High excitation potential is recognized as a harmful factor for the biological activity of biomacromolecules, such as proteins and nucleic acids, in electrochemiluminescence (ECL) biosensing. Developing low-potential ECL luminophores is vital for improving ECL accuracy in actual sample sensing. In this work, based on porous metal-organic framework (MOF) structure with multiple active sites and energy transfer between the excited ligands and Ln nodes, we designed a series of Ln-MOFs and observed ECL emission at low potential, providing a novel method to realize low-potential ECL. The MOF nanoemitters were prepared using 1,3,5-tri (4-carboxyphenyl)benzene ligand and several lanthanide ions as nodes through mild hydrothermal reaction. Interestingly, strong ECL emission at +0.75 V of peak potential was observed in the ECL-potential curve of Tb-based MOF using 2,2′,2″-nitrilotriethanol as coreactant, which was beneficial for reducing background interference in biosensing, and this ECL emission was attributed to the energy transfer between Tb and excited ligand. This low-potential ECL was then applied to construct an ECL biosensor with newly developed Cas12a-based method for selective detection of microRNA-155 without the help of strand displacement or reverse transcription. For this ECL system, the limit of detection was 0.78 nM, and the overall detection time was 2.5 h. The Ln-MOF nanoemitter provides a robust ECL platform to selectively detect various targets by integrating new bio-related techniques.
研究领域:
生物传感
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分析化学
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分子生物学
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Zhongshuai Zhao,Ran Li,Ying Zhu,Zhongde Liu
Hydrogen sulfide (H 2 S), playing unique role on signal transmission in various physiological processes, the rapid and accurate monitoring of it is particularly concerned. The drawbacks of fluorescence probe for H 2 S, namely poor selectivity or long response time, have always existed. As a test case, here headspace separation combined fluorescence strategy was attempted, on basis of H 2 S stimuli-responsive AMP/Tb 3+ /Ag + or GMP/Tb 3+ /Ag + coordination polymer probes. The fluorescence intensity of them is inversely proportional to the concentration of it, due to Ag-S in situ coordination and partial formation of Ag 2 S. Using the hybrid analysis, a quick response of less than 2.0 min and a high selectivity could be obtained. The signal change (Δ I ) of AMP/Tb 3+ /Ag + or GMP/Tb 3+ /Ag + showed good linearity within the range of 0.5–100 μM and 1.0–150 μM, along with a detection limit (3 σ ) of 0.2 and 0.4 μM, respectively. When utilized to determine the sulfide level in real samples, it shows recoveries from 96.4 % to 102.3 % with relative standard derivation ( RSD ) less than 3.0 %. The combination strategy of headspace separation and fluorescence quantitative analysis was verified to effectively eliminate potential interference such as other coexisting non-volatile thiol-containing species, providing a novel avenue to flexibly design the volatile component analysis with high selectivity in complex sample matrixes.
研究领域:
分析化学
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环境科学
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生物化学
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材料科学
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ChemPlusChem
·
2025
·
IF 2.8
Shangzai Wu,Xiaolong Gong,Guojian Ren,Linglong Yi,Qi Zhou,Qinhe Pan
Graphical GA: A stable coordination polymer (HNU-90-Tb) is synthesized by the assembling of 4-carboxytriphenylamine and Tb 3+ , which exhibits highly selective detection of salicylaldehyde by fluorescence quenching with the limit of detection of 0.07 ppm and response time 30 s. The detection mechanism can be contributed to the internal filtration effect and dynamic quenching. Salicylaldehyde, an essential chemical intermediate, is extensively utilized in pharmaceutical and fragrance industries. However, the excessive usage leads to environmental pollution and poses potential risks to human body. Hence, it is urgent to develop the effective sensor for the detection of salicylaldehyde (SAL). Herein, a new terbium(III)-based coordination polymer ( HNU-90-Tb ) is constructed by the assembly of 4-carboxytriphenylamine (HL) with Tb 3 + . Benefiting from the hydrophobic structure of HL, HNU-90-Tb exhibits remarkable stability in aqueous environments and is capable of maintaining structural integrity in pH range of 2–11. Notably, HNU-90-Tb enables quantitative detection of SAL through fluorescence quenching, achieving a low detection limit of 0.07 ppm and a rapid response time of just 30 s. HNU-90-Tb also shows excellent selectivity toward a variety of aldehyde analogs. The detection mechanism can be attributed to the combined inner filter effect and dynamic quenching mechanism.
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Materials Chemistry Frontiers
·
2026
·
IF 8.1
Qian Zhang,LIN MA,Guo Wei Wang,Yuhang Huang,Luyang Du,Taifeng Lin,Zheng-Guang Yan
Rare-earth doping has emerged as a promising strategy to tailor the optoelectronic properties of metal halide perovskites, yet its potential for enhancing gamma-ray detection performance remains underexplored. The synthesis of large-sized, rare-earth doped perovskite single crystals remains challenging due to the adverse effects of dopants on crystal growth and lattice stability. Herein, we achieved 16 mm in-sized MA0.89FA0.11PbBr3: Tb single crystals (Tb/Pb=0.13%-0.67%) via nucleation control and precursor regulation. The X-ray fluorescence mapping confirms the uniform distribution of Tb3+ within the crystal lattice at low Tb/Pb ratio (≤0.35%). The successful incorporation of rare earth ions and a concomitant lattice contraction induce profoundly enhancing the charge transport characteristics. Specifically, doping with 0.13% Tb³⁺ increased the carrier mobility from 55 to 154 cm² V⁻¹ s⁻¹ and prolonged the carrier lifetime from 197 to 4422 ns. Consequently, the fabricated gamma-ray detector achieved a high energy resolution of 4.3 % for 241Am radiation (59.5 keV), a significant improvement over 15.7 %. This work demonstrates rare-earth doping as an effective strategy toward high-performance perovskite radiation sensors.
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MOLECULES
·
2024
·Vol. 29
·期 24
·5903
·
IF 4.2
Yang Zhang,Hua Tan,Jiaping Zhu,Linhai Duan,Yuchi Ding,Fenglan Liang,Yongshi Li,Xinteng Peng,Ruomei Jiang,Jiaxin Yu,Jianjiong Fan,Yuhang Chen,Rimeng Chen,Deyun Ma
The development of lanthanide–organic frameworks (Ln-MOFs) using for luminescence sensing and selective gas adsorption applications is of great significance from an energy and environmental perspective. This study reports the solvothermal synthesis of a fluorine-functionalized 3D microporous Tb-MOF with a face-centered cubic (fcu) topology constructed from hexanuclear clusters (Tb6O30) bridged by fdpdc ligands, formulated as {[Tb6(fdpdc)6(μ3-OH)8(H2O)6]·4DMF}n(1), (fdpdc = 3-fluorobiphenyl-4,4′-dicarboxylate). Complex1displays a 3D framework with the channel of 7.2 × 7.2 Å2(measured between opposite atoms) perpendicular to thea-axis. With respect to Ba2+cation, the framework of activated1(1a) exhibits high selectivity and reversibility in luminescence sensing function, with an LOD of 4.34665 mM. According to the results of simulations, compared to other small gas molecules (CO2, N2, H2, CO, and CH4), activated1(1a) shows a high adsorption selectivity for C2H2at 298 K.
研究领域:
材料科学
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环境科学
·
化学
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
An Wang,Jiayou Liao,Xu Wu,Xianjie Meng,Jiwei Ma,Siyuan Peng,Yinghua Shen,Chengyun Gao
This study employs the same diamine monomer to synthesize polyimide (PI) and Tröger’s Base-based polymers of intrinsic microporosity (TB), which exhibit infinite miscibility due to like-dissolves-like phenomenon. The TB and PI exhibit significantly different thermal decomposition temperatures, enabling the partial carbonization of TB at a lower temperature while retaining the favorable mechanical properties of PI. Consequentially, This work propose a novel method to prepare blend membranes with a partial amorphous carbon structure. These membranes have excellent gas separation performance, similar to that of carbon membranes, while also retaining the machinability of traditional polymer membranes. The molecular structure of the material is characterized using 1H NMR and FTIR spectra, while the microscopic morphology is observed through scanning electron microscopy. Molecular dynamics simulations confirm the compatibility of both polymers and explain the improved properties. Gas transportation measurement confirms that PI@TB blend membranes demonstrate significant improvement in gas separation performance compared to original membranes. Specifically, enhancements in the gas separation performance of CO 2 /CH 4 , H 2 /CH 4 , and O 2 /N 2 systems have been observed, with the CO 2 /CH 4 pair demonstrating the most remarkable improvements, surpassing the 2019 Robeson upper limit. This design strategy can be applied to produce blend membranes containing amorphous carbon that exhibit great potential for high-performance separation processes in the future.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Jinyu Yang,Lin Luo,Zhuo Chen,Xueyu Chen,Xiaoyu Tang
Single phase of Tb-doped YPO 4 phosphors with xenotime structure were successfully synthesized via a polyacrylamide gel at different annealing temperatures (650–1050 °C). The crystal structure, thermal behavior and optical properties of the as-synthesized samples were investigated by XRD , TG-DTA, FT-IR, PL, and XPS . The effects of heat treatment on the structure and luminescence properties of samples were discussed. The PL spectra results reveal that the annealing temperature plays a key role in the luminescence properties of products. The samples obtained under 650–850 °C exhibit a strong green emission at 546 nm, attributing to the 5 D 4 - 7 F 5 transition of Tb 3+ , while the samples produced above 850 °C emit dominating blue lines at 381 and 415 nm, corresponding to the 5 D 3 - 7 F 6 and 5 D 3 - 7 F 5 transitions, respectively. The XPS results imply that a part of doping Tb 3+ ions may be oxidized to Tb 4+ on the high-temperature thermal treatment process, which could be the reason for the bluish color of Tb-doped YPO 4 phosphors.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Bowen Wang,Xuyan Xue,Changshuai Gong,Xuejiao Wang,Qiushi Wang,Ji-Guang Li
A series of Tb 3+ substituted layered perovskite Sr(La 1- x Tb x )AlO 4 ( x = 0–1) was synthesized via solid-state reaction. The influence of Tb 3+ on the phase, structure, photoluminescence, and long afterglow properties of the SrLaAlO 4 product was investigated. The fully substituted product SrTbAlO 4 was found to be isostructural with its SrLaAlO 4 counterpart, and the crystal structure parameters were first reported in this work. Photoluminescence investigation found that benefiting from the unique layered crystal structure, the activator Tb 3+ was well separated and the optimal doping concentration was found to be as high as 20 at%. Except for photoluminescence, the products simultaneously show long afterglow properties due to disorder cations distribution in the local structure and thus induced defect condition. When the UV light source is turned off, the afterglow luminescence of SrLaAlO 4 : 0.03 Tb 3+ can last over 1 h. The trap distribution of SrLaAlO 4 : Tb 3+ was analyzed in detail by thermoluminescence. The trap depth is calculated to be around 0.7–0.81 eV, the value of which highly coincides with the ideal energy level for trapping and releasing electrons at room temperature. On the basis of the experimental results, the mechanism of long afterglow luminescence of SrLaAlO 4 : Tb 3+ is elaborated and discussed.
研究领域:
材料科学
·
光学
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BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Qiang Chen,Junfeng Zuo,Jinfeng Chen,Ping Tong,Xiujuan Mo,Lan Zhang,Jianrong Li
In this paper, a novel label-free fluorescent biosensor for terbium (ш) (Tb 3+ ) was proposed based on structural conversion of G-quadruplex DNA mediated by Thioflavin T (ThT) and Tb 3+ . In the presence of K + , ThT could bind to K + -stabilized parallel G-quadruplex, giving rise to high fluorescence intensity . Upon the addition of Tb 3+ , Tb 3+ could competitively bind to parallel G-quadruplex leading to the structural change, which resulted in fluorescence decrease. The change of fluorescence intensity (Δ F = F 0 – F ) showed a good linear response toward the concentration of Tb 3+ over the range from 1.0 pM to 10.0 µM with a limit of detection of 0.55 pM. This proposed biosensor was simple and cost-effective in design and in operation with ultrahigh sensitivity and selectivity . Thus, the proposed biosensor could be a promising candidate for monitoring ultratrace Tb 3+ in environment.
研究领域:
生物化学
·
环境科学
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wang Luo,Xintong Zhang,Kaofeng Huang,Bohan Wang,Yu Wang,Zhilie Tang,Kezhi Zheng
Long afterglow materials feature long-lasting luminescence after the cessation of the excitation source. The rising demand for afterglow materials in many applications such as deep tissue imaging, ultrasensitive sensing, and radiation detection has led to extensive research on X-ray-activated afterglow systems. However, the progress in this field is constrained by the limitation and shortage of radiation-induced afterglow materials. Herein, a newly X-ray-excited long afterglow phosphor CaZnOS:Tb 3+ has been developed by using lithium-assisted synthetic protocol. Afterglow properties of Tb 3+ -doped CaZnOS microcrystals are systematically investigated by considering the dopant concentration, reaction temperature, reaction time, reaction atmosphere, and gas flow . As the gas flow of argon atmosphere increases from 0.05 to 0.5 L/min, the CaZnOS:Tb 3+ microcrystals exhibit a distinct change in trap depth from 0.59 to 0.75 eV, corresponding to a gradual increase in afterglow time. Together with thermoluminescence analysis, the long afterglow mechanism is also discussed in this work. These results highlight the importance of reaction gas flow for the efficient regulation of traps and defects in afterglow materials. Furthermore, they provide a fundamental design principle and new route for the creation of lanthanide-doped CaZnOS afterglow phosphors.
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