Laser & Photonics Reviews
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2026
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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.
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ACS Applied Polymer Materials
·
2025
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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
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微电子学
·
航空航天工程
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BIOSENSORS & BIOELECTRONICS
·
2019
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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
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材料科学
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生物技术
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纳米技术
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ACS Applied Polymer Materials
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2022
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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.
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Materials Today Communications
·
2021
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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.
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ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 17
·2000675
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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.
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SOLID STATE SCIENCES
·
2015
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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 .
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MACROMOLECULAR BIOSCIENCE
·
2017
·Vol. 17
·期 9
·1700143
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IF 3.238
Shan Yan,Lin-Yan Wan,Xiao-Jie Ju,Jiang-Feng Wu,Lei Zhang,Ming Li,Zhuang Liu,Wei Wang,Rui Xie,Liang-Yin Chu
In this work, a novel type of block copolymer micelles with K + -responsive characteristics for targeted intracellular drug delivery is developed. The proposed smart micelles are prepared by self-assembly of poly(ethylene glycol)- b -poly( N -isopropylacry-lamide- co -benzo-18-crown-6-acrylamide) (PEG- b -P(NIPAM- co -B18C6Am)) block copolymers. Prednisolone acetate (PA) is successfully loaded into the micelles as the model drug, with loading content of 4.7 wt%. The PA-loaded micelles display a significantly boosted drug release in simulated intracellular fluid with a high K + concentration of 150 × 10 −3 m , as compared with that in simulated extracellular fluid. Moreover, the in vitro cell experiments indicate that the fluorescent molecules encapsulated in the micelles can be delivered and specifically released inside the HSC-T6 and HepG2 cells responding to the increase of K + concentration in intracellular compartments, which confirms the successful endocytosis and efficient K + -induced intracellular release. Such K + -responsive block copolymer micelles are highly potential as new-generation of smart nanocarriers for targeted intracellular delivery of drugs.
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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.
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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
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物理化学
·
化学工程
·
流体物性
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Boxuan Lou,Yue Xu,Xiaolan Qin,Chang Liu,Shujun Wang,Haikuan Yuan,Xijian Liu,Lijuan Zhang,Jie Lu
In this work, the solubility of unsolvated crystalline (R)-equol in six (alcohols + n -heptane) binary solvents and that of solvated crystalline (R)-equol in methanol along with ethanol were firstly systematically measured and analyzed. The experimental results revealed that the solubility of unsolvated crystalline (R)-equol was positively correlated with temperature and mass fraction of alcohol. And the solubility order was 2-propanol > 1-propanol > 1-butanol > 1-pentanol > 3-methyl-1-butanol > 2-methyl-1-propanol > n -heptane. The transformation temperatures between unsolvated and solvated forms were acquired at 316.28 K and 310.50 K, respectively. Meanwhile, the experimental solubility data of unsolvated crystalline (R)-equol were correlated using modified Apelblat, λh , quartic polynomial and CNIBS/R-K equations, in which the modified Apelblat equation achieved the best regression performance. Besides, the dissolution of unsolvated crystalline (R)-equol was endothermic. Furthermore, solvent parameters, solvation free energy and molecular electrostatic potential surface obtained through molecular simulation were used to explain the experimental phenomena, and found the polarity of solvents, van der Waals and hydrogen bonding interactions made different contributions to various dissolution processes.
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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
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