Laser & Photonics Reviews
·
2026
·
IF 9.7
Yan Xiang,Zhixiong Xu,Tongcheng Wei,Miaomiao Ma,Nan Yang,Pengpeng Dai,Meng Zhang,Xintong Zhang
Wide-temperature color-stable luminescence is a critical requirement for high-performance phosphor-converted light-emitting diodes (pc-LEDs). However, broadband emitters, particularly Bi 3+ -activated phosphors, universally suffer from thermally induced spectral drift. This behavior originates from their intrinsic sensitivity to temperature-dependent crystal-field reconfiguration and electron–phonon coupling (EPC) under thermal cycling conditions. To overcome the above bottleneck, we propose a lattice engineering strategy grounded in an intrinsically low-thermal-expansion host, using Gd 2 Zr 2 O 7 (GZO) as a model system. Benefiting from its ultralow coefficient of thermal expansion (6.56 × 10 −6 K −1 ), the GZO host robustly suppresses lattice distortion and markedly attenuates EPC effects over an ultra-wide temperature range (6–423 K). Such unique structural characteristics decouple Bi 3+ emission from thermally driven lattice dynamics, endowing the phosphor with intrinsic thermal spectral stability. The optimized composition, Gd 2 Zr 2 O 7 : 0.03Bi 3+ , demonstrates outstanding chromatic stability across the entire temperature range, with negligible average CIE coordinate deviations of Δ Δ $\Delta $ x = 0.00987 and Δ Δ $\Delta $ y = 0.01205. Furthermore, it exhibits unique excitation- and temperature-responsive luminescence, enabling flexible dual-mode spectral modulation. This study transforms the design route of wide-temperature color-stable phosphors from passive external heat dissipation to active intrinsic low-expansion host engineering and provides a general strategy for exploiting anti-color-drift broadband luminescent materials.
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yehui Liang,Xiaoying Li,Guanxiang Zhong,Ruoyu Chen,Wenyang Kou,Kai Wang,Hetao Chu
Polyimide films have been widely used in the fields of microelectronics and aerospace due to their exceptional overall performance. However, achieving simultaneous improvements in the dielectric, toughness, and mechanical properties of PI films has been a critical and challenging problem. Herein, pyromellitic dianhydride and 4,4′-oxydianiline were used as reactive monomers to prepare polyamic acid porous microspheres (PM) (PAA–PM) and polyimide PM (PI–PM) using a multiple emulsion method. The results show that PAA–PM has high transverse relaxation times (T2) in the precursor solution, which enables high additive capacity, and its homogeneous dispersion in the precursor solution benefits from the hydrogen bond interactions between the carboxyl groups of PAA–PM and the molecular chains of the precursor. Due to the formation of a microcross-linking bridged structure between PAA–PM and the precursor after thermal imidization, the toughness of the final composite film was increased by 332.6% compared to pure PI film, while the tensile strength and elongation at break were improved by 24.5% and 71.1%, respectively. In addition, the dielectric constant decreased by 23.1% (from 3.63 to 2.79 at 1 MHz) and the incorporation of microspheres has almost no effect on thermal stability of the film (T5% of 559.46 °C). The PM effectively mitigated the deterioration of dielectric properties caused by the reduction of the free volume fraction during the thermal stretching of the films.
研究领域:
材料科学
·
微电子学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zaichao Guo,Jiachang Li,Qinggang Huang,Bo Wang,Jingyi Ma,Mengling Fang
Biological ion channels have excellent monovalent ion separation performance, and it is of great significance to develop artificial membrane materials with monovalent ion selectivity based on their mechanism. The latent-track method is a new technology to prepare sub-nanometer channels on polymer membranes by swift heavy ion irradiation. This method has been widely applied in the study of mono/divalent ion separation membranes, but its application in monovalent ion separation membranes still needs to be explored. In this work, polyimide (PI) film was irradiated by swift heavy ion, then water rinsed, and the sub-nanoporous PI membrane with effective channel size in the range of 0.30 and 0.66 nm was fabricated, then its electrical and transport properties were studied. Due to the smaller hydrated diameter and lower hydration energy of K + , the membrane exhibited good selectivity for K + . The selectivity ratio of K + /Li + is 3.4–3.9, and the maximum K + flux can reach 0.44 mol m −2 h −1 at 55℃. The sub-nanoporous PI membranes are expected to be applied in salt lake lithium extraction, fine processing of potassium and lithium, and other relevant scenarios.
研究领域:
材料科学
·
生物仿生学
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Ting Ye,Heng Gao,Qingqing Zhang,Chenxiao Yan,Yali Yu,Yifan Fei,Longlong Gao,Xiaoshun Zhou,Yong Shao
Due to the high abundance of K + in environments and K + -induced high stability of G-quadruplex (G4), developing a selective G4-based fluorescent sensor for other metal ions with K + tolerance is a great challenge. Herein, we found that even in the presence of 15000-fold excess of K + , Ba 2+ exhibits a highly specific binding with a human telomeric G4 (htG4) in comparison with other G4-binding metal ions such as Pb 2+ and Sr 2+ . This specific binding event can be recognized by a natural fluorophore of hypericin with a lighting-up fluorescence response. Interestingly, inverting the polarity of the most 3' G in htG4 can sensitize the Ba 2+ response with the retaining Ba 2+ specificity and K + tolerance. This polarity inversion of htG4 causes a G4 conformation change in K + and the polarity-inverted htG4 tends to favorably dimerize in response to the Ba 2+ specific binding. To our knowledge, this is the first report that polarity inversion of G4 can be applied to construct a selective metal sensor with K + tolerance. Our findings will open a new way to conveniently regulate the G4 conformation and stability by polarity inversion towards developing high-performance sensors.
研究领域:
化学
·
材料科学
·
生物技术
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 17
·2000675
·
IF 16.836
Yang Hu,Wu Tang,Qihang Yu,Xinxin Wang,Wenqiang Liu,Jiahui Hu,Cong Fan
Organic redox-active molecules are inborn electrodes to store large-radius potassium (K) ion. High-performance organic cathodes are important for practical usage of organic potassium-ion batteries (OPIBs). However, small-molecule organic cathodes face serious dissolution problems against liquid electrolytes. A novel insoluble small-molecule organic cathode [ N , N ′-bis(2-anthraquinone)]-perylene-3,4,9,10-tetracarboxydiimide (PTCDI-DAQ, 200 mAh g −1 ) is initially designed for OPIBs. In half cells (1–3.8 V vs K + /K) using 1 m KPF 6 in dimethoxyethane (DME), PTCDI-DAQ delivers a highly stable specific capacity of 216 mAh g −1 and still holds the value of 133 mAh g −1 at an ultrahigh current density of 20 A g −1 (100 C). Using reduced potassium terephthalate (K 4 TP) as the organic anode, the resulting K 4 TP||PTCDI-DAQ OPIBs with the electrolyte 1 m KPF 6 in DME realize a high energy density of maximum 295 Wh kg −1 cathode (213 mAh g −1 cathode × 1.38 V) and power density of 13 800 W Kg −1 cathode (94 mAh g −1 × 1.38 V @ 10 A g −1 ) during the working voltage of 0.2–3.2 V. Meanwhile, K 4 TP||PTCDI-DAQ OPIBs fulfill the superlong lifespan with a stable discharge capacity of 62 mAh g −1 cathode after 10 000 cycles and 40 mAh g −1 cathode after 30 000 cycles (3 A g −1 ). The integrated performance of PTCDI-DAQ can currently defeat any cathode reported in K-ion half/full cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2015
·
IF 1.839
Xiao Zhao,Dajiang Mei,Jingli Xu,Yuandong Wu
The reactions of A 2 SO 4 ( A = K, Cs) and Sb 2 O 3 with H 2 SO 4 (98%) yielded single crystals of A Sb(SO 4 ) 2 ( A = K, Cs). The crystal structures were investigated by single crystal X-ray diffraction. KSb(SO 4 ) 2 crystallizes in the monoclinic space group P 2 1 / c (No. 14) with lattice parameters a = 10.6745(18), b = 7.1579(12), c = 8.7597(15) Å, β = 91.466(3) ° , V = 669.1(2) Å 3 , Z = 4. CsSb(SO 4 ) 2 crystallizes in the orthorhombic space group P 2 1 2 1 2 1 (No.19) with lattice parameters of a = 5.2429(8), b = 9.5942(16), c = 14.850(2) Å, V = 746.98(20) Å 3 , Z = 4. Both compounds show the Sb 3+ cations in same seesaw-type coordination of oxygen atoms from different SO 4 2 − anions, but exhibit complex two-dimensionally and one-dimensionally linked anionic structures. The alkali cations are located between the layers or chains. The compounds were characterized with FT-IR spectra and solid state UV–vis–NIR diffuse reflectance spectroscopy . The band gaps were estimated at 4.64 eV for KSb(SO 4 ) 2 and 4.68 eV for CsSb(SO 4 ) 2 .
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Min Shen,Tingting Pan,Juewei Ning,Jiayan Shi,Hongtian Liu,Yanqing Tian
We report on the fabrication of K + fluorescent sensor P2 based on thermoresponsive poly(N-isopropylacrylamide) and small molecule K + fluorescent sensor KS. P2 changed its size with a range from 35 °C to 42 °C and exhibited lower critical solution temperature (LCST) at 38 °C. The LCST affected the polymer’s nanostructures and microenvironment of KS, which in turn affected P2 ’s fluorescence intensities and responses to K + . Furthermore, P2 exhibited high selectivity and sensitivity to K + with a dynamic response range from 1 to 20 mM, enabling its suitableness for extracellular K + analysis. The sensor was further used to in situ monitor the K + fluctuation of Escherichia coli and B. Subtilis 168 bacteria under lysozyme stimulation in 96 well plate by a high throughput analysis approach, and cell species dependent K + release was observed. The PNIPAM-based K + sensor P2 shows potential application in antimicrobial drugs/peptides screening.
研究领域:
生物化学
·
分子生物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Fengping Liu,Jing Sun,Qiang Fang
Two biobased functional monomers (M1 and M2) derived from isoeugenol have been successfully prepared through the Ullmann–Ma and the Piers–Rubinsztajn reactions in an overall yield of more than 81%. These two monomers have also been converted into the cross-linked polymers by a thermo-curing reaction. The obtained polymers display good thermostability, hydrophobicity, and low-dielectric performance. Among them, cured M1 exhibits a higher glass transition temperature (Tg) of 384 °C and a lower coefficient of thermal expansion (CTE) of 53 ppm/°C in a range of the temperatures from 25 to 350 °C, while cured M2 displays good dielectric properties with a dielectric constant (Dk) of 2.53 and a dielectric loss (Df) of 1.21 × 10–3 at a frequency of 5 GHz. Such good dielectric properties for cured M2 remain stable even keeping it in boiling water for 96 h. The thermo-curing reaction of the mixture of two monomers in a molar ratio of 1:1 was also investigated and the results indicated that the formed polymer (cured B1) had good comprehensive performances with a Tg of 265 °C, CTE of 67 ppm/°C, Dk of 2.62, and Df of 1.96 × 10–3. Such data are superior to those of many commercial dielectric materials, suggesting that the two biobased monomers are suitable as the precursors of dielectric materials for the application in high-frequency communication.
研究领域:
材料科学
·
化学工程
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Xiaojun Deng,Ping Zhou,Xiayan Yan,Renjin Xiong,Huaqin Kou,Wenhua Luo
To spare the use of OSDA and fluorides, for the sake of reducing cost and environmental conservation, a green and efficient synthesis recipe of low-silica CHA zeolites has been demonstrated, without using seeds or any other zeolites. The main factors that determine the formation of CHA zeolites have been investgated systemmatically, and several rules are obtained. (i) just considering simple memallic cations acting as the SDA , K + is indispensable for the formation of CHA framework, with noting that K + can also direct to MER topology. (ii) working as catalyst or minerization agent, OH − and F − function almost identically, but when the concentration of F − has reached a really high level or even only F − was used, CHA framework can not form because the intermediate fluoride complexes are inclined to produce small melecules of fluoride salts with morderate solubility over to enter the zeolite framework. (iii) at conditions of this work, the second stirring after the RT aging should be adopted since the contrastive tests have showed the benifits of the second stirring in making fewer or smaller impurity grains. (iv) when the concentration of K + is too high in reactive gels, with the other same conditions, MER over CHA framework is preferentially to form. (v) it is reasonable to consider the as-synthesized K-CHA materials can be used to research the novel “trapdoor” effect later. The authors considered the discussions and conclusions would offer some beneficial references to the green synthesis of zeolites and further understanding of the mechanism of hydrothermal treatment .
研究领域:
材料科学
·
环境化学
·
无机化学
✓ 已验证
DOI
高影响因子
POULTRY SCIENCE
·
2024
·
IF 3.8
Meng Zhang,Pengfei Du,Jin Wan,Yimeng Chen,Xin Chen,Yumei Zhang
ABSTRACT Sodium dehydroacetate ( DHA-Na ) is a fungicidal preservative widely used in food and animal feed. DHA-Na can induce coagulation disorders in rats and poultry by inhibiting carboxylation of vitamin K-dependent proteins; it can also impair bone development in zebrafish. However, the effects of DHA-Na on broiler chicken bones remain unknown. Here, we assessed whether DHA-Na impairs bone development in broiler chickens. We administered Suji yellow chickens with 200 to 800 mg/kg DHA-Na, 2 mg/kg vitamin K, or both for 2 mo. Bone metabolite–related serum indicators, tissue micromorphology, and relevant protein expression were monitored during the treatment period. We also assessed primary chicken osteoblast activity, differentiation, and bone metabolite–related proteins after treatment with DHA-Na, vitamin K, or both. The results demonstrated that DHA-Na reduced bone index values and serum and bone osteoblast differentiation marker levels but blocked bone vitamin K cycle. DHA-Na also increased serum osteoclast differentiation marker levels, as well as the bone ratio of receptor activator of nuclear factor kappa-Β ligand to osteoprotegerin ratio. Moreover, DHA-Na reduced bone trabecular number, thickness, and area and increased trabecular separation considerably. In general, compared with the control group, the DHA-Na group demonstrated impairments in osteoblast activity and differentiation, as well as in the vitamin K cycle. By contrast, vitamin K supplementation led to considerable attenuation of the DHA-Na-induced decrease in osteogenic marker levels, along with a considerable increase in serum bone absorption marker levels and restoration of DHA-Na-induced bone microstructure damage. Vitamin K also attenuated DHA-Na-induced impairment in osteoclasts. In conclusion, the results indicated that in broiler chickens, DHA-Na supplementation can damage bones by inhibiting osteoblast function and increasing osteoclast activity; this damage can be prevented through vitamin K supplementation.
研究领域:
动物科学
·
营养学
·
兽医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Phytopathology Research
·
2019
·Vol. 1
·期 1
·1-10
·
IF 0
Fan Fei,Hahn Matthias,Li Guo-Qing,Lin Yang,Luo Chao-Xi
Benzimidazole fungicides (MBCs) have been widely used in agriculture since 1970s, and resistance to this class of fungicides in Botrytis cinerea is reported worldwide. Resistance to MBCs in B. cinerea is related to mutations in the target β-tubulin gene ( TUB2 ). Compared with the mutation at codon 200, the substitutions from glutamic acid to alanine (E198A), valine (E198V), or lysine (E198K) at codon 198 are currently the predominant mutations in MBC resistant populations of B. cinerea . In this study, a loop-mediated isothermal amplification (LAMP) method was established for rapid detection of benzimidazole resistance in B. cinerea. On the basis of the three mutations at TUB2 codon 198, three sets of LAMP primers were designed, and each of these primer sets was able to specifically amplify the DNA containing its corresponding mutation, while no amplification was detected with other mutated or the wild type DNA. After optimization, the sensitivity and specificity tests illustrated that this LAMP assay had good sensitivity and specificity to detect specific resistant genotypes in B. cinerea . Result also showed that the LAMP assay had good reproducibility. Above all, boiled mycelia could be used as templates, which simplified the process and increased the efficiency of the assay. Considering its rapidity, simplicity, and high efficiency, the LAMP assay developed in this study is a promising tool for the diagnosis of benzimidazole resistance in B. cinerea , and will contribute to the monitoring of resistance development to MBCs in the future.
研究领域:
植物病理学
·
分子诊断
·
真菌遗传学
✓ 已验证
产品关联
DOI
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Shengshan Bi,Tao Jia,Kang Zhao,Xianyang Meng,Jiangtao Wu
The density data for 2-ethylhexyl acetate, 2-methoxyethyl acetate, and diethyl succinate were reported. The density measurements were conducted with a high-pressure vibrating-tube densimeter over 9 isotherms at (283.15 to 363.15) K and 16 isobars at (0.1 to 100) MPa. The uncertainty of each obtained datum was estimated, and the expanded uncertainties of density measurements with a confidence level of 0.95 (k = 2) of density measurement for 2-ethylhexyl acetate, 2-methoxyethyl acetate, and diethyl succinate are 0.1 %. The experimental densities were correlated with the Tait-type equation, and the absolute average percentage deviations were 0.010 %, 0.009 %, and 0.011 % for 2-ethylhexyl acetate, 2-methoxyethyl acetate, and diethyl succinate, respectively. In addition, the isothermal compressibility and the isobaric thermal expansivity were derived from the Tait-type equation.
研究领域:
热力学
·
物理化学
·
化学工程
·
流体物性
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）