ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jinhong Huang,Youhao Liao,Guanjie Li,Ning Xu,Mengqing Xu,Weishan Li
The cyclic stability of traditional poly (vinylidenefluoride- co -hexafluoropropylene) (P(VdF-HFP)) and our newly developed poly (butyl methacrylate-acrylonitrile-styrene) (P(BMA-AN-St)) copolymer-based gel polymer electrolyte (GPE) must still be improved to satisfy the increasingly rigid demands of lithium ion batteries that have higher energy densities . Series ratios of P(VdF-HFP) and P(BMA-AN-St) blended membranes were prepared using an electrospinning method to compensate for the disadvantages of a single copolymer-based membrane. The results showed that the compositions of P(VdF-HFP) and P(BMA-AN-St) had sizeable effects on the physical and electrochemical characterization of GPE, in which the P4 membrane and the GPE blending ratio of P(VdF-HFP): P(BMA-AN-St) = 1: 4 had the best properties. Because the P4 membrane showed the best interconnected pore structure and highest porosity, the GPE exhibited the highest ionic conductivity , with a value of 1.4 × 10 −3 S cm −1 at ambient temperature. Due to the better compatibility of the P4-based GPE with a lithium anode and its considerably electrochemical stability, the LiNi 0.5 Mn 1.5 O 4 /GPE/Li coin cell had an excellent cyclic performance, in which a 98% capacity retention under a 1 C rate was maintained after 150 cycles compared to the coin cell that used a pure P(VdF-HFP)-based GPE that maintained 86% of its discharge capacity under the same test conditions. Furthermore, the acceptable rate characterization of the P4-based GPE was presented with a discharge capacity at a 5 C rate that retained 92% of its counterpart at 1 C .
研究领域:
材料科学
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电化学
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储能技术
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高分子科学
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锂离子电池
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DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Qinzhao Sun,Bofeng Shi,Tianran Zhang,Weijie Yang,Jiping Wang,Lixue Zhang,Dezhen Xue,Zepeng Wang,Fang Kang,Xiaoxiao Zhang
Dielectric capacitors with a high energy-storage density and efficiency are urgently required for miniaturization and integration of power electronics and pulsed power system. Herein, single-layered stretched P(VDF-HFP) with a certain content of poly(methyl methacrylate) (PMMA) and two kinds of sandwich-structured films are prepared to optimize and compare energy-storage performance. The results revealed that the crystallization transition behavior of stretched P(VDF-HFP) films contributed to enhance its electric polarization, while the introduction of linear type PMMA resulted in an enhancement of voltage tolerance of stretched films by improving the mechanical properties and suppressing leakage current. What’s more, the effects of crystalline orientations and structure design on the breakdown mechanism of stretched films were revealed by finite element theoretical simulation. As a consequence, the stretched sandwich-structured 0-25-0-S (pure P(VDF-HFP) serves as the outer layer, and blends represent the middle layer; the digit representing PMMA content in the P(VDF-HFP)) displayed a high Ue of 28.71 J/cm3 and η of 74% under 680 MV/m. This work provides a workable and effective method for developing capacitive films with great energy-storage performance.
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 7
·期 1
·1901579
·
IF 4.713
Yangyang Zhu,Qiang Xie,Yang Sun,Lu Wang,Qiang Sun,Lijuan Wang
Gas sensors based on different interface layers are prepared by vacuum evaporation method. In comparison with the microscope images of films on different interface layer, zinc phthalocyanine (ZnPc) films exhibit good continuity on the heterogeneous interface of p -sexiphenyl/α-sexithiophene ( p -6P/α-6T). Under the optimal conditions of ZnPc films, ZnPc film sensors with high performance are obtained based on ultrathin heterogenous interface layers. The responsivity is up to 2271% at 3 ppm NO 2 gas and the sensitivity is 570% ppm −1 . The minimum detection limit of sensors is lower than 500 ppb and the responsivity is 157% to 500 ppb NO 2 gas. The high performance of sensors is attributed to the ultrathin heterogeneous interface layer. The island-like p -6P domains at the bottom provide the precursor for the growth of α-6T layer while the α-6T molecules fill the interval of p -6P islands, as a result, a continuous interface for the growth of ZnPc molecules came into being. In addition, the ZnPc and α-6T films have high electrical characteristics. The results are favorable for the adsorption and desorption of NO 2 gas molecules. The ultrathin heterogeneous interface layer provides a feasible research evidence for the further research and development of ultrathin and flexible electronic devices.
研究领域:
材料科学
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电子工程
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环境监测
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DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2015
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IF 0
Yang Yi Chen,Qi Zhong,Tao Chen,Ji Ping Wang
The cotton fabrics with enhanced cleaning capability were prepared by grafting thermo-responsive random copolymer poly (2-(2-methoxyethoxy) ethoxyethyl methacrylate-co-acrylic acid), abbreviated as P(MEO2MA-co-AA), to the amino modified cotton fabrics. ATR-FTIR measurement confirmed the immobilization of P(MEO2MA-co-AA) to the cotton fabrics. Equilibrium swelling ratio indicates that the cotton fabric with grafted P(MEO2MA-co-AA) possesses thermo-responsive ability .The enhanced cleaning capability was investigated by the decontamination experiments probed with confocal microscope. The results show the cleaning capability can be prominently improved when the cleaning temperature is lower than the LCST of P(MEO2MA-co-AA).
研究领域:
材料科学
·
纺织工程
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DOI
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zengsheng Guo,Hao Wu,Ming Li,Tao Tang,Jianfeng Wen,Xinyu Li
Reducing the direct recombination of the photogenerated electron-hole pairs in a photocatalytic system is important to improve the photocatalytic efficiency. Transferring the photogenerated carriers to other adsorbates is a usual way to reduce the direct recombination probability. By synthesizing p-type phosphorus-doped graphene quantum dots (P-GQDs) to form p-n junctions with n-type TiO 2 nanocomposites, the photogenerated holes of TiO 2 can be effectively transferred to P-GQDs, thus the direct carrier recombination of TiO 2 is decreased, resulting in the conspicuous improvement of the Methyl Orange (MO) photodegradation efficiency to 95.5% in 14 min. This work provides a new type of p-n junction in highly efficient photodegradation system.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Jihai Duan,Pengxia Sun,Hui Zhao,Zhengnan Ji,Delu Zhang,Weiwen Wang
Nanostructure photocatalysts with unique and stable structure and high specific surface area are expected to be widely used in photocatalytic CO 2 reduction. In this paper, columnar cactus-like Cd x Cu 1-x S/CuO/CM composite catalyst was prepared by a simple method combining thermal oxidation with a successive ionic layer adsorption and reaction (SILAR) technique. The combination of Cd x Cu 1-x S nanosheets and CuO nanowires can significantly improve the specific surface area, capacity of light capture and absorption and separation of electrons and holes inside which were beneficial for efficiency of photocatalysis . Their complementary conduction band and valence band positions synergistically form p-n heterojunctions , achieving the effect of multi-level charge separation. The 2D/1D Cd x Cu 1-x S/CuO/CM have better photocatalytic activity than pure CuO nanowires in the production of methanol by using solar energy to reduce CO 2 . After 4 h of irradiation, the methanol yield of 2D/1D Cd x Cu 1-x S/CuO/CM reached 3.60 μmol g −1 cat, which was 2.81 times the yield of pure CuO/CM. This work has certain significance for the development of new energy and environmental protection.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Mengxuan Yu,Runze Huang,Xingchen Zhang,Xudong Hu,Xi Ran,Hang Xia,Mohan Yuan,Jianbing Zhang,Liang Gao,Jiang Tang,Xinzheng Lan
HgTe colloidal quantum dots (CQDs) have gained significant interest due to their extremely wide spectral response and excellent solution processability, making them promising candidates for the next-generation infrared photodetectors. However, the limited availability of p -type HgTe CQDs poses a significant challenge to device construction. In this study, a room-temperature process is identified – one based on a cation exchange process – for the preparation of p -type Au-doped HgTe CQDs. The resultant Au-doped HgTe CQDs exhibit tunable p -type doping, enhanced defect passivation, and improved doping homogeneity than conventional Ag-doped HgTe CQDs. By using Au-doped HgTe CQDs as the hole transport layer, high-performance p -on- n photodiodes are demonstrated, where a record external quantum efficiency (EQE) of 58.8% at ≈1.6 µm and a specific detectivity above 10 12 Jones are successfully demonstrated. This work shows the promise of heterovalent doping in CQDs for advancing infrared optoelectronic devices and is poised to pave the way for further exploration of innovative doping strategies in nanomaterials.
研究领域:
材料科学
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光电技术
·
纳米技术
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Renting Jiang,Fan Shao,Yaxuan Lu,Linhu Li,Hua Su,Ming Li
Two major obstacles of nanomedicines in cancer therapy are the limited tumor penetrability and drug-resistance, especially for those large tumors, severely hampering their therapeutic efficacy for clinical translation. Here, a charge-convertible degradable silica nanocapsule co-packaging doxorubicin (DOX) and P- glycoprotein siRNA (siPgp) (DOX-siPgp@Cap ⊖ ) that can penetrate throughout the entire tumors and suppress Pgp protein expression for effective drug-resistant cancer therapy of large tumors is reported. When sensing the tumor acidity, the DOX-siPgp@Cap ⊖ undergoes negative-to-positive charge-reversal and triggers cationization-mediated transcytosis for efficient co-delivery of DOX and siPgp into the deep tumor sites, achieving high cellular uptake efficiency and deep tumor penetration. The DOX-siPgp@Cap ⊖ is degradable in acidic lysosomes, leading to sustainable releases of siPgp and DOX and their subsequent escape from lysosomes. Evidently, the DOX-siPgp@Cap ⊖ displays the superior deep tumor penetration capability, and concomitantly suppresses Pgp expression in tumor tissues, thereby significantly reducing DOX resistance. In vivo studies demonstrate the exceptional therapeutic efficacy of the DOX-siPgp@Cap ⊖ in drug-resistant triple-negative breast cancer mouse models that leads to the eradication of clinically large tumors (≈500 mm 3 ) with significantly extended survival. This study provides a promising solution for maximizing the therapeutic benefits of nanomedicines in drug-resistant cancer therapy.
研究领域:
肿瘤学
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纳米医学
·
药理学
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产品关联
DOI
高影响因子
BIOCHEMICAL PHARMACOLOGY
·
2025
·
IF 5.6
Mi Zhou,Jiahuan Hong,Xiaofeng Qiu,Zixian Xiong,Xiaoyong Liu,Zhuan Qin,Zhesi Luo,Qi Chen,Mianjie Lin,Ling Min,Xiaorong Yang,Xinmin Guo,Bin Xu,Jianwen Mao
Multidrug resistance (MDR) in tumor cells presents a significant challenge in cancer therapy. This study investigates the role of serum-derived extracellular vesicles (EVs) in mediating MDR during chemotherapeutic exposure. The findings indicate that short- or long-term co-incubation of doxorubicin (Dox)-pretreated serum derived EVs (EVs(S-PT)) caused drug-sensitive MCF-7 breast cancer cells to develop a MDR phenotype. In addition, serum EVs contain a high concentration of unglycosylated P-glycoprotein (P-gp). Chemotherapy treatment of tumor patients or exposure to chemotherapeutic drugs in vitro activates serum glycosyltransferases, inducing glycosylation of EVs P-gp and giving it drug-pumping activity. Furthermore, damage caused by Dox to the vascular endothelial barrier facilitates the crossing of serum EVs into the tumor microenvironment. These EVs are then taken up by tumor cells, providing them with access to a significant quantity of glycosylated P-gp proteins that possess transporter activity and the ability to evade degradation by the ubiquitin proteasome system. The results indicate that EVs(S-PT) transfers glycosylated P-gp across the damaged vascular endothelial barrier into MCF-7 cells and that these glycosylated P-gp remain intracellular for a long period of time, inducing MDR in the cells. Our study highlights a novel mechanism of acquired MDR and provides a potential avenue for therapeutic interventions targeting the serum EVs pathway in cancer therapy.
研究领域:
肿瘤学
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细胞生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Weiwei Liu,Zichen Yu,Zhichao Chen,Ling Ma,Yanghao Liu,Zhen Zhang,Qingyang Xu
5-Hydroxytryptamine (5-HT), also known as serotonin, plays a critical role in mood regulation, insomnia treatment, and free radical scavenging. Currently, 5-HT production primarily relies on plant extraction, which is challenged by limited raw materials and environmental concerns, emphasizing the need for innovative green production strategies. In this study, we explored a high-performance producer for biosynthesizing 5-HT in Escherichia coli. First, we constructed and optimized the 5-HT biosynthetic pathway to convert L-tryptophan (l-Trp) to 5-HT, avoiding the accumulation of tryptamine and 5-hydroxytryptophan. Moreover, precursor enrichment eliminated the need for l-Trp supplementation and dynamic downregulation of pyruvate kinase balanced growth and production. Further, the metabolic flux between the tetrahydrobiopterin (BH4) module and the hydroxylation-decarboxylation module was optimized, reducing l-Trp accumulation. A novel “GXAA” system was implemented to enhance intracellular NAD(P)H supply, including (1) expression of gdhbsu (glucose dehydrogenase) from Bacillus subtilis, gapXfbr (mutated glyceraldehyde-3-phosphate dehydrogenase) from Corynebacterium glutamicum, and pntAB (pyridine nucleotide transhydrogenase); (2) knockout of ldhA (lactate dehydrogenase). Finally, transcriptomic analysis under high-5-HT stress revealed a potential 5-HT transporter, YhjX. The resulting strain WW15 produced 15.5 g/L 5-HT and a yield of 0.063 g/g glucose through a two-stage fed-batch fermentation, representing the highest titer and yield reported to date.
研究领域:
生物化学
·
合成生物学
·
微生物学
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DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 15
·2302918
·
IF 8
Abida Perveen,Yubing Xu,Syed Muhammad Abubakar,Premkumar Sellan,Wang Xin,Fawad Saeed,Sajid Hussain,Byung Seong Bae,Jianming Zhou,Ying Zhu,Wei Lei
The perovskite single crystals (PSC) produced by solution-processed metallic ions doping have a thick p–n junction (greater than 10 µm). Meanwhile, to achieve high responsivity, the carrier drift length (µτE) has to be larger than the dimensions of the detector. If the p–n junction is quite thick, a high bias voltage is required. For the practical application of photodiode, it is imperative to find a means to generate a thin p–n junction. A productive technique is suggested for forming a thin p–n junction by diffusing metallic ions, resulting in a longer drift length of the carrier than the depletion width. Thinner p–n junction leads to reduced dark current density (0.5 µA cm −2 ), low trap density (5.71 × 10 8 cm −3 ), high mobility (417 cm 2 V −1 s −1 ), and hence increased responsivity (77.69 A W −1 ) for 30 µW cm −2 UV illumination under a low applied voltage of −15 V. A quick response time with a rise/fall duration of 22 ms/30 ms under 0 V and long-term stability for over 3 months in ambient airis achieved. To comprehend the performance with the thinner p–n junction-based photodiodes, the results under UV–Vis illumination are examined and compared. The outcomes hint at a method that holds promise for producing efficient photodiodes.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Materials Advances
·
2023
·Vol. 5
·期 3
·1234-1239
·
IF 5
Yi Lv,Jing Yang,Haibo Li,Wei Liu,Gangfeng Ouyang
In this paper, the structures and optical properties of copper(I) halide mononuclear hybrids have been studied. Three pairs of compounds with different organic ligands have been synthesized by a precursor approach, exhibiting significantly enhanced stability compared to typical copper halide monomers by the formation of stronger Cu–P bonds, proving that copper halide monomer-type hybrid compounds have the potential to be developed into high-performance light-emitting materials.
研究领域:
材料化学
·
光学材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）