NATURE MATERIALS
·
2024
·
IF 37.2
He Yunfeng,Cheng Yu,Yang Canhui,Guo Chuan Fei
Artificial pressure sensors often use soft materials to achieve skin-like softness, but the viscoelastic creep of soft materials and the ion leakage, specifically for ionic conductors, cause signal drift and inaccurate measurement. Here we report drift-free iontronic sensing by designing and copolymerizing a leakage-free and creep-free polyelectrolyte elastomer containing two types of segments: charged segments having fixed cations to prevent ion leakage and neutral slippery segments with a high crosslink density for low creep. We show that an iontronic sensor using the polyelectrolyte elastomer barely drifts under an ultrahigh static pressure of 500 kPa (close to its Young’s modulus), exhibits a drift rate two to three orders of magnitude lower than that of the sensors adopting conventional ionic conductors and enables steady and accurate control for robotic manipulation. Such drift-free iontronic sensing represents a step towards highly accurate sensing in robotics and beyond.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-15
·
IF 14.7
Tian Xiaoli,Li Fu,Tang Zhenyuan,Wang Song,Weng Kangkang,Liu Dan,Lu Shaoyong,Liu Wangyu,Fu Zhong,Li Wenjun,Qiu Hengwei,Tu Min,Zhang Hao,Li Jinghong
Metal-organic frameworks (MOFs) with diverse chemistry, structures, and properties have emerged as appealing materials for miniaturized solid-state devices. The incorporation of MOF films in these devices, such as the integrated microelectronics and nanophotonics, requires robust patterning methods. However, existing MOF patterning methods suffer from some combinations of limited material adaptability, compromised patterning resolution and scalability, and degraded properties. Here we report a universal, crosslinking-induced patterning approach for various MOFs, termed as CLIP-MOF. Via resist-free, direct photo- and electron-beam (e-beam) lithography, the ligand crosslinking chemistry leads to drastically reduced solubility of colloidal MOFs, permitting selective removal of unexposed MOF films with developer solvents. This enables scalable, micro-/nanoscale (≈70 nm resolution), and multimaterial patterning of MOFs on large-area, rigid or flexible substrates. Patterned MOF films preserve their crystallinity, porosity, and other properties tailored for targeted applications, such as diffractive gas sensors and electrochromic pixels. The combined features of CLIP-MOF create more possibilities in the system-level integration of MOFs in various electronic, photonic, and biomedical devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Plant Diseases and Protection
·
2024
·
IF 2.1
Liang Jun-Yu,Yang Ying-Ying,Feng Rui,Zhang Xiao-Han,Wang Xu-Dong,Wang Jun-Long,Kong Wei-Bao,Zhang Ji
This study investigated chemical compositions and biocidal activities from the aerial parts of Rhododendron thymifolium against Tribolium castaneum , Lasioderma serricorne , and Ditylenchus destructor . In total, 13 components were isolated from the aerial parts of R. thymifolium by chromatographic separation techniques. Based on the results of MS, 1 H NMR, and 13 C NMR spectrometry, their structures were determined as ent-kaurane-16β-ol ( 1 ), pentacosane ( 2 ), undecanoic acid, ethyl ester ( 3 ), 1-Tridecanethiol ( 4 ), 1-Dodecanol ( 5 ), 4-Methyl-7-hydroxycoumarin ( 6 ), tertradecan-1-ol ( 7 ), apocynin ( 8 ), 3-Methoxy-4-methylbenzaldehyde ( 9 ), scopoletin ( 10 ), hyperin ( 11 ), quercetin ( 12 ), acetophenone ( 13 ). In addition, ent-kaurane-16β-ol ( 1 ) was isolated from R. thymifolium for the first time. Then, the insecticidal toxicities against T. castaneum , L. serricorne , and D. destructor . of compounds 1–13 were evaluated, and the results showed that apocynin ( 8 ) and acetophenone ( 13 ) exhibited obvious contact activity against the storage pests with LD 50 values of 6.46 and 8.72 μg/adult respectively. Acetophenone ( 13 ) showed excellent contact activity against D. destructor with LC 50 values of 0.08 mg/mL. The study clearly showed the active fractions from R. thymifolium have might potential to be developed into potential compounds on storage insect prevention.
✓ 已验证
产品关联
DOI
高影响因子
CANCER IMMUNOLOGY IMMUNOTHERAPY
·
2024
·Vol. 73
·期 7
·1-24
·
IF 4.6
Liu Hongxu,Yao Maojin,Ren Jiaoyan
The majority of the immune cell population in the tumor microenvironment (TME) consists of tumor-associated macrophages (TAM), which are the main players in coordinating tumor-associated inflammation. TAM has a high plasticity and is divided into two main phenotypes, pro-inflammatory M1 type and anti-inflammatory M2 type, with tumor-suppressive and tumor-promoting functions, respectively. Considering the beneficial effects of M1 macrophages for anti-tumor and the high plasticity of macrophages, the conversion of M2 TAM to M1 TAM is feasible and positive for tumor treatment. This study sought to evaluate whether the glycopeptide derived from simulated digested Codonopsis pilosula extracts could regulate the polarization of M2-like TAM toward the M1 phenotype and the potential regulatory mechanisms. The results showed that after glycopeptide dCP1 treatment, the mRNA relative expression levels of some M2 phenotype marker genes in M2-like TAM in simulated TME were reduced, and the relative expression levels of M1 phenotype marker genes and inflammatory factor genes were increased. Analysis of RNA-Seq of M2-like TAM after glycopeptide dCP1 intervention showed that the gene sets such as glycolysis, which is associated with macrophage polarization in the M1 phenotype, were significantly up-regulated, whereas those of gene sets such as IL-6-JAK-STAT3 pathway, which is associated with polarization in the M2 phenotype, were significantly down-regulated. Moreover, PCA analysis and Pearson's correlation also indicated that M2-like TAM polarized toward the M1 phenotype at the transcriptional level after treatment with the glycopeptide dCP1. Lipid metabolomics was used to further explore the efficacy of the glycopeptide dCP1 in regulating the polarization of M2-like TAM to the M1 phenotype. It was found that the lipid metabolite profiles in dCP1-treated M2-like TAM showed M1 phenotype macrophage lipid metabolism profiles compared with blank M2-like TAM. Analysis of the key differential lipid metabolites revealed that the interconversion between phosphatidylcholine (PC) and diacylglycerol (DG) metabolites may be the central reaction of the glycopeptide dCP1 in regulating the conversion of M2-like TAM to the M1 phenotype. The above results suggest that the glycopeptide dCP1 has the efficacy to regulate the polarization of M2-like TAM to M1 phenotype in simulated TME.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INFLAMMATION
·
2024
·
IF 4.5
Yuan Xin,Sheng Liang,Shi Guang,Jiang Leiwei,Lian Chengxiang
Rosacea is a chronic facial inflammatory skin disease that occurs with dysfunction of the immune system. Colchicine was reported to have anti-inflammatory properties. However, the impact of colchicine on rosacea remains unclear. In the present study, the phenotype of rosacea lesions was evaluated by the redness score, inflammatory biomarkers were analyzed by reverse transcription PCR (RT‒PCR), and the infiltration of inflammatory cells was assessed by IHC analysis and immunofluorescence in a rosacea-like mouse model. In vitro , RT‒PCR was used to identify the inflammatory factors that Toll-like receptor 2 (TLR2) agonist caused neutrophils to produce, and immunofluorescence and coimmunoprecipitation were used to identify putative signalling pathways. We found that skin erythema and histopathological alterations, as well as elevated proinflammatory factors (IL-1β, IL-6, TNFα, CXCL2) and CAMP, were significantly ameliorated by colchicine treatment in LL37-induced rosacea-like mice. In addition, colchicine reduced the colocalization of TLR2 and neutrophils and the formation of neutrophil extracellular trap networks (NET) in mouse lesions. In neutrophils, colchicine markedly reduced TLR2 agonist-induced inflammatory biomarker expression, NET formation, and ROS production. Moreover, we found that LL37 could bind to TLR2 upon activation of TLR2 in neutrophils. Importantly, colchicine could repress the combination of TLR2 and LL37 in vivo . Finally, bioinformatics methods further validated the key molecules of neutrophil-related inflammation in rosacea, which is consistent with our experimental findings. Collectively, colchicine ameliorated rosacea-like dermatitis by regulating the neutrophil immune response activated by the TLR2 pathway, indicating that it could be an effective therapeutic option for patients with rosacea.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 45
·21027-21039
·
IF 3.5
Zhang Peng,Guo Mengya,Wang Fujiang,Tang Qiong,Ge Hui,Guo Shuke,Zhou Ligong,Li Xuekuan,Dong Jinxiang,Tang Mingxing,Liu Lei
Selective hydrogenation is an effective approach to utilize coal tar and slurry oil to produce high value-added fine chemicals. However, how to efficiently improve the selectivity of the target product and the stability of the catalyst is difficult. Herein, the PdZn alloy catalyst was synthesized by the assistance of strong interaction between active metal (Pd) and support (ZnO) for hydrogenation of anthracene to symmetrical octahydro anthracene (sym-OHA). The PdZn alloy catalyst reduced at 400 °C was found to exhibit a 100% conversion of the anthracen with 84.77% selectivity to sym-OHA under the optimized conditions (200 °C, 1 MPa). The characterization analysis indicated that the PdZn alloy with electron-rich Pd active sites is more efficient in the selective hydrogenation than the pure Pd metal. The study of the deep hydrogenation of sym-OHA (Hydrogenation of sym-OHA to perhydroanhtracene) showed that PdZn alloy catalysts were inactive to further hydrogenation of sym-OHA. Additionally, due to the strong interaction between Pd and ZnO, the Pd/ZnO(400) catalyst shows high stability for five cycles. These findings are of practical significance for the selective hydrogenation of polycyclic aromatic hydrocarbons (PAHs) to produce high value-added products.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 5
·1-15
·
IF 23.2
Meng Xiangwei,Qiao Jing,Liu Jiurong,Wu Lili,Wang Zhou,Wang Fenglong
The fabrication of nano-materials with delicate microstructure design and suitable multicomponent allocation is considered as a promising approach to meet the requirements of lightweight, high efficiency, and broadband absorption for electromagnetic wave (EMW) absorbers. Toward this end, nickel/carbon@zirconium dioxide core–shell nanofibers composited with polyurethane were successfully prepared through flexible electrospinning, carbonization, and a subsequent resin curing process. Profiting from the synergistic coactions of constituents and unique morphology, the ternary nanocomposites displayed the minimum reflection loss of − 61.7 dB at 17.1 GHz, and an ultra-broad bandwidth up to 8.3 GHz. In-depth investigation through electromagnetic parameters analysis and electric field distribution simulation indicated that the introduction of zirconium dioxide brought about the optimal impedance matching, while the existence of nickel and abundant heterogeneous interfaces contributed to diverse attenuation pathways, including interface polarization, dipoles polarization, conductivity loss, and magnetic loss. Thus, this study paved new research avenues for the design and synthesis of one-dimensional high-performance microwave absorbing materials, and enriched the application range of polyurethane matrix composites.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Xu Lihuan,Yao Lin,Yang Naikun,Su Chang
Compared with traditional inorganic materials, the organic materials as electrodes are considered as candidates for the next-generation aqueous zinc-ion batteries (ZIBs) due to their high safety, low cost, design flexibility, high theoretical specific capacity, adjustable structure, controllable synthesis methods, and large-scale energy storage. Recently, the dihydrophenazine-based compounds with the multi-electron active center and high discharge voltage have attracted much attention. Herein, we prepared a dihydrophenazine-based polymer of poly-(N-phenyl-5,10-dihydrophenazine) (p-DPPZ) through Buchwald-Hartwig C-N coupling reaction. With the double tertiary amine active centers in each dihydrophenazine unit, the p-DPPZ as the cathode of ZIBs exhibited a discharge specific capacity of 136 mAh g −1 at 0.05A g −1 , companying with the multi-electron redox characteristics with two-step discharge platforms at the operating voltage of 0.65 and 1.18 V (vs. Zn 2+ /Zn), respectively. Also, the extended π-conjugated structure and the stable N redox-active centers by aromatic benzene linker in p-DPPZ polymer endowed the electrode material with the excellent rate performance and the cycling stability. It demonstrated a discharge specific capacity of 92 mAh g −1 even at high current rate of 1 A g −1 . Furthermore, it exhibited an ultralong cycle life of 5000 cycles at 5 A g −1 with 95.1% of the capacity retention as compared to its stable discharge specific capacity. Density functional theory (DFT) and molecular electrostatic potential (MESP) simulations indicated that during two-step redox processes of DPPZ–e – → DPPZ + and DPPZ + –e – → DPPZ 2+ , the SO 4 2− ions in the electrolyte were adsorbed at the active sites of the tertiary amine N in the organic cathode, the molecular orbital levels improved, and the corresponding energy gap became small, suggesting the favor charge transfer ability during the redox process. Furthermore, the electrochemical studies indicated that the energy storage mechanism for the p-DPPZ polymer was mainly controlled by the surface capacitance-diffusion hybrid kinetics process. This work demonstrates that the developed dihydrophenazine-based polymer was an efficient alternative to developing polymer-based cathodes with high performances for aqueous ZIBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 5
·1-12
·
IF 2.8
Chen Zheng,Hou Junxin,Jin Xiangwei,Zheng Lingxia,Liu Fenghua,Li Zhixiang
The utilization of the high-entropy effect and the cocktail effect in high-entropy oxides has significantly expanded the horizon for material design and performance enhancement. Consequently, the fabrication of high-entropy oxides has emerged as a focal point of recent research. High-entropy oxides that serve as cathode materials for battery electrodes must exhibit high electrical conductivity. In this study, a high-entropy oxide (La 0.2 Ba 0.2 Cu 0.2 Sn 0.2 Ni 0.2 ) 3 O 4 was synthesized using the high-temperature solid-state reaction method. A systematic investigation was conducted to analyze the impact of varying sintering temperatures on the phase structure and electrical properties of the material. The findings indicate that the high-entropy oxide under study possesses commendable electrical conductivity. The electrical conductivity of the material was observed to increase initially and then decrease with the elevation of sintering temperature. Optimal electrical conductivity was achieved at a sintering temperature of 1280 °C. The temperature-dependent electrical conductivity of the sample was found to increase initially and then decrease, with a nominal conductivity of 20.062 S·cm −1 at 25 °C, and a stepwise increase to 30.06 S·cm −1 at 250 °C. This material holds promising potential for applications in energy, electronics, and catalysis sectors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 10
·4929-4945
·
IF 3.9
Gao Shanshan,Wang Wenshuo,Xing Haoran,Pan Pengju,Bao Yongzhong
Solid polymer electrolytes (SPEs) are routinely regarded as potential candidates to replace conventional lithium-ion liquid electrolytes due to their high safety and energy density. Poly(ethylene oxide)/poly(vinylidene fluoride)/lithium bis(trifluoromethanesulfonyl)imide (PVDF/PEO/LiTFSi) SPEs were prepared by a one-step electrospinning process and utilized in lithium metal batteries in this study. The electrospinning process enhanced the compatibility between PEO and PVDF, and induced the α to β -phase crystalline transition of PVDF. Consequently, the continuity of the conductive phase, the solubility and the migration ability of lithium ions within the polymer matrix were improved. Compared to PEO/PVDF/LiTFSi SPE prepared by a solution casting method, the electrospun SPE exhibited superior electrochemical performances at the same composition, achieving a lithium-ion transference number of 0.64 at room temperature and 0.60 at 60 °C. The assembled LiFePO 4 /SPE/Li cell shows a stable capacity of 112 mAh g −1 with a retaining capacity of 105 mAh g −1 after 400 cycles at the current density of 1 C at 60 °C, and the Coulombic efficiency is 100%. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·
IF 4.7
Zhang Xutao,Chen Weiliang,Li Xiangqi
Excellent photocatalytic performance and recyclability are crucial for the long-term use of the photocatalyst. In this study, 5 mol% Fe doped zinc oxide (ZF5), was freeze-dried with bacterial cellulose (BC)/sodium alginate (SA) solution to fabricate a novel composite aerogel capable of degrading methylene blue (MB) under visible light. Ca 2+ crosslinking and hydrophobic modifications were adopted to strengthen the aerogel skeleton and enhance the cycling photocatalytic activity, meanwhile, making the aerogel floatable persistently. The influences of pH, ZF5 dosage, and initial solution concentration on MB degradation were investigated. Benefiting from the synergy between the components and the combined modification, the optimum composite aerogel exhibits photocatalytic efficiency of up to 97.4% at an initial MB concentration of 20 mg/L within an irradiation time of 80 min. In addition, it exhibits a degradation efficiency of 79.7% even after 8 cycles, showing great potential in visible-light-driven degradation of MB.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 25
·11440-11453
·
IF 3.5
Mohite Dadaso D.,Chavan Sachin S.,Lokhande P. E.,Dubal Sumit,Kadam Vishal,Jagtap Chaitali,Rednam Udayabhaskar,Salve Maruti,Chaure N. B.,Al-Asbahi Bandar Ali,Kumar Yedluri Anil
Supercapacitors (SCs) have fascinating potential for the energy storage systems of the future due to their exceptional power delivery and quick charge and discharge capabilities. However, its energy density continues to be a barrier to its general use. This study investigates the electrochemical properties of electrospun polyacrylonitrile (PAN) nanofiber (NF) composites embedded with cobalt hydroxide (Co(OH) 2 ) nanoparticles (NPs) for SC electrodes. The synthesis of CNFs involves electrospinning PAN solutions loaded with Co(OH) 2 precursors, followed by heat treatment to enhance structural integrity and electrochemical performance. The crystallographic and morphological study of the composite fibres was conducted through different characterization methods. The electrochemical performance of Co 3 O 4 /PAN CNFs-based composite electrodes is evaluated through CV, GCD, and EIS measurements, revealing their suitability for SC applications. The findings reveal that the synergistic effects of Co 3 O 4 NPs within the PAN NFs contribute to enhanced specific capacitance, cyclic stability, and rate capability, thus offering significant prospects for the development of high-performance SCs. The Co 3 O 4 /PAN CNFs//AC device is constructed using PVA/KOH gel electrolyte, which demonstrated an energy density of 11.19 Whkg −1 at a power density of 1000 Wkg −1 . The device exhibits 69% capacitance retention over 3000 cycles at 100 mVs −1 , indicating strong cycling stability and electrochemical reversibility, which are crucial for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）