JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 20
·1-8
·
IF 2.8
Wang Fenjing,Chen Kejian,Yi Xuran,Shen Yang,Lin Yanni,Zhou Zheqi
Self-healing memristor devices were fabricated in this study using a cost-effective and structurally uncomplicated hydrogel consisting of polyvinylalcohol, sodium alginate, and sodium tetraborate. The device is environmentally friendly, biocompatible, possesses a good switching ratio (~ 50), stable memristor under long time run (> 2000 s), and is able to mimic the learning and forgetting functions. In addition, the device could complete the self-healing process at room temperature to rapidly recover its structure and the memristor function. Therefore, it shows great potential for bioelectronics, data storage, and data encryption.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Wang Feifei,Zhang Jipeng,Lu Haotian,Zhu Hanbing,Chen Zihui,Wang Lu,Yu Jinyang,You Conghui,Li Wenhao,Song Jianwei,Weng Zhe,Yang Chunpeng,Yang Quan-Hong
Aqueous zinc batteries are ideal candidates for grid-scale energy storage because of their safety and low-cost aspects. However, the production of large-format aqueous Zn batteries is hindered by electrolyte consumption, hydrogen gas evolution and accumulation, and Zn dendrites growth. To circumvent these issues, here we propose an “open” pouch cell design for large-format production of aqueous Zn batteries, which can release hydrogen gas and allow the refilling of the electrolyte components consumed during cell cycling. The cell uses a gel electrolyte containing crosslinked kappa (k)-carrageenan and chitosan. It bonds water molecules and hinders their side reaction with Zn, preventing electrolyte leakage and fast evaporation. As a proof-of-concept, we report the assembly and testing of a Zn | |Zn x V 2 O 5 ·nH 2 O multi-layer “open” pouch cell using the carrageenan/chitosan gel electrolyte, which delivers an initial discharge capacity of 0.9 Ah and 84% capacity retention after 200 cycles at 200 mA g ‒1 , 370 kPa and 25 °C.
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Science China-Technological Sciences
·
2023
·Vol. 66
·期 8
·2258-2270
·
IF 4.6
Wang Na,Gu An,Lei Yong
Lacquer is the main raw material of lacquerware, while UV-irradiation is an important factor leading to its aging. In order to investigate the aging behavior of urushi lacquer film under UV-irradiation, and to propose parameters that can be used to evaluate its aging degree, the micro-UV/Py-GC/MS system has been applied in the present work to enrich and identify volatile products released by urushi film during aging on the one hand, and to investigate micro-amount and conventional urushi films with different aging degrees on the other hand, in addition, representative historical samples have also been investigated. Volatile products released by urushi film demonstrate that during UV-irradiation, polysaccharides wrapping urushiol polymer would be first degraded to generate furans and alcohols, and then urushiol polymer would undergo photo-oxidation and break of molecular chain, mainly generating oxidation products including aldehydes, organic acids, and ketones, as well as a small number of alkyl benzenes and hydrocarbons. Py-GC/MS analysis of micro-amount urushi films with different aging degrees indicates that UV-irradiation is more destructive to aliphatic chains in urushiol polymer, but it also can accelerate the polymerization of micro-amount urushi film. Py-GC/MS analysis of conventional urushi films indicates that with the increase of aging degree, the total chromatographic peak area ratio of hydrocarbons to benzene derivatives gradually increases, the peak area ratio of 3-pentadecenyl-catechol to 3-pentadecyl-catechol gradually decreases, and the peak area ratio of aging products of urushiol to 3-pentadecyl-catechol gradually increases. The above parameters were further used to evaluate the aging degree of two urushi-contained samples separately collected from the surface and interior of a carved lacquer panel in the Forbidden City, and evaluation results are in accord with the natural aging law and further verify the reliability of the proposed parameters. Research results of the present work can lay a foundation for the in-depth study of the UV-irradiation aging mechanism of urushi.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 8
·1-8
·
IF 2.7
Cui Hongshan,Hu Lifang,Zhu Jichao,Wang Liping,He Jie
Ethyl mercaptan is a typical volatile pollutant with strong irritating odor and very low olfactory threshold. A small amount of exhaust emissions will cause a very bad impact on the surrounding environment and human health. A novel Fe 2 O 3 -loaded ZnTi-layered double hydroxide (Fe 2 O 3 –ZnTi-LDH) photocatalytic material was prepared by hydrothermal method. The physical and chemical properties of Fe 2 O 3 –ZnTi-LDH and its corresponding precursors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (ATR, FT-IR), X-ray photoelectron spectroscopy (XPS), and N 2 adsorption–desorption measurements, Ultraviolet–visible diffuse reflection spectrum (UV–vis DRS), and Mott–Schottky (MS) method. The photocatalytic performance of the material is evaluated under a static condition. The results show that the uniform distribution of Fe 2 O 3 on ZnTi-LDH improves the photocatalytic efficiency of the Fe 2 O 3 –ZnTi-LDH. At the same time, the interaction between the Fe 2 O 3 and the ZnTi-LDHs further enhances the catalytic stability of the Fe 2 O 3 –ZnTi-LDH. The results also show a significant synergistic effect between Fe 2 O 3 and ZnTi-LDH. Fe 2 O 3 –ZnTi-LDH provides a new catalyst structure for photocatalytic conversion of ethyl mercaptan and a new research idea for the treatment of ethyl mercaptan.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-15
·
IF 10.2
Ye Ruihua,Guo Qingyun,Huang Jiaqiang,Wang Zixu,Chen Yaoxing,Dong Yulan
Ulcerative colitis (UC) is currently the most common inflammatory bowel disease (IBD). Due to its diverse and complex causes, there is no cure at present, and researchers are constantly exploring new therapies. In recent years, nano-selenium particle(SeNP) has attracted wide attention due to excellent biological activities. Therefore, in this study, for the first time, we used a natural polysaccharide, Eucommia ulmoides polysaccharide (EUP), modified SeNP to get EUP-SeNP with a size of about 170 nm, and its effect on 3% dextran sulphate sodium (DSS) induced colitis was explored. Our results showed that colon intestinal histology, intestinal mucosal barrier, inflammatory cytokines and intestinal microbiome composition were changed after EUP-SeNP treatment in colitis mice. Specifically, it was also shown that oral treatment of EUP-SeNP could relieve the degree of DSS-induced colitis in mice by restoring weight loss, reducing disease activity index (DAI), enhancing colon antioxidant capacity and regulating intestinal microbiome composition. In addition, we verified the mechanism in intestinal epithelial cell lines, showing that EUP-SeNP inhibited LPS-induced activation of the TRL-4/NF-κB signaling pathway in intestinal epithelial cell lines. To some extend, our study provides therapeutic reference for the treatment of IBD.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 24
·1-19
·
IF 2.8
Chen Haixue,Wang Xinyue,Zeng Zejun,Zhang Guoqi,Zhang Jing,Liu Pan
With the development of electronic technology towards high power, miniaturization, and system integration, power electronic packaging is facing increasing challenges, especially for die attachment. This research aims to explore silver-coated copper (Cu@Ag) paste with sufficient mechanical properties and high-temperature reliability, as an alternative solution for silver sintering with lower cost. Firstly, micro-Cu@Ag sintering pastes were investigated under four kinds of polyol-based solvent systems and two types of particle morphologies, which included sphere-type (SCu@Ag) and flake-type (FCu@Ag). Sintering performance and microstructural evolution were compared and analyzed. Notably, sintered joints employing the terpineol–polyethylene glycol solvent system and flake-type morphology displayed a denser microstructure in comparison to SCu@Ag joints. Its bonding strength reached 36.15 MPa, which was approximately 20% higher than SCu@Ag joints. Subsequently, the influence of key sintering process parameters on Cu@Ag joints was analyzed, including sintering temperature, pressure and time. Additionally, high-temperature aging and thermal cycling tests were conducted on the optimized Cu@Ag joints to assess their reliability. Finally, the micromechanical properties of Cu@Ag joints before and after high-temperature aging were further evaluated by nanoindentation including creep properties. The elastoplastic constitutive models of Cu@Ag sintered materials with different particle morphologies were constructed, providing valuable insights for reliability evaluation. The results indicated that FCu@Ag joints exhibited satisfactory creep resistance and high-temperature reliability. In conclusion, the FCu@Ag micro-paste based on the terpineol–polyethylene glycol solvent system proposed in this study demonstrated sufficient bonding strength, high reliability, and adequate mechanical properties as an attractive solution for high-temperature power electronics packaging.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 31
·12724-12735
·
IF 4.5
Zhang Changhai,Wang Hairui,Zhang Tiandong,Zhang Yue,Zhang Yongquan,Tang Chao
Polymer dielectric materials are attracting wide focus in electronics, but their low energy density limits miniaturization and intelligent application. In recent years, the sandwich-structured has offered an ideal way to enhance the energy storage performance of polymer materials. In this work, the symmetrically sandwich composite dielectrics were prepared, containing an outer layer of poly (vinylidene fluoride-trifluoro ethylene chlorofluoride)@titanium dioxide (P (VDF-TrFE-CFE)@TiO 2 ) and an inner layer of poly (methyl methacrylate)@magnesium oxide (PMMA@MgO). The sandwich structure can combine the advantages of the excellent breakdown strength of PMMA and the superior polarization strength of P (VDF-TrFE-CFE). Moreover, TiO 2 with a high dielectric constant further improves the polarization strength, and the insulation performance enhances by MgO with a large band gap. The experimental results show that 0.5–1–0.5 sandwich composite dielectric has the most excellent breakdown strength of 633.8 kV/mm, and a discharge energy density of 17.16 J/cm 3 with an efficiency of 70.1%. This work offers experimental guidance for the development of outstanding energy storage performance of polymer dielectric capacitors.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Li Huixin,Xu Yanpeng,Wang Yang,Cui Yihao,Lin Jiake,Zhou Yuemin,Tang Shuling,Zhang Ying,Hao Haibin,Nie Zihao,Wang Xiaoyu,Tang Ruikang
Material-based tactics have attracted extensive attention in driving the functional evolution of organisms. In aiming to design steerable bioartificial organisms to scavenge pathogenic waterborne viruses, we engineer Paramecium caudatum (Para), single-celled microorganisms, with a semiartificial and specific virus-scavenging organelle (VSO). Fe 3 O 4 magnetic nanoparticles modified with a virus-capture antibody (MNPs@Ab) are integrated into the vacuoles of Para during feeding to produce VSOs, which persist inside Para without impairing their swimming ability. Compared with natural Para, which has no capture specificity and shows inefficient inactivation, the VSO-engineered Para (E-Para) specifically gathers waterborne viruses and confines them inside the VSOs, where the captured viruses are completely deactivated because the peroxidase-like nano-Fe 3 O 4 produces virus-killing hydroxyl radicals (•OH) within acidic environment of VSO. After treatment, magnetized E-Para is readily recycled and reused, avoiding further contamination. Materials-based artificial organelles convert natural Para into a living virus scavenger, facilitating waterborne virus clearance without extra energy consumption.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 35
·84778-84790
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IF 5.8
Li Wei,Hou Huizhen,Hu Jiye
Consumers are becoming more concerned about pesticide residues in food. Since citrus represent a significant portion of the diet, it is appropriate to monitor the pesticide residues in citrus. In this paper, we modified a QuEChERS method combined with HPLC-MS/MS to investigate residue levels of 15 pesticides and 3 metabolites in citrus (whole fruit and pulp) and orange juice from the markets in China. And the dietary exposure risks were evaluated by using the hazard quotient (HQ) and hazard index (HI) methods based on deterministic and probabilistic models. The recoveries of the modified method ranged from 70 to 112% at three spike levels of 0.005–0.5 mg/kg with relative standard deviations of 1.0–18.1%. Pesticide residues were detected in 85.84% of the whole citrus and 40.00% of pulp, with concentrations ranging from 0.005 to 0.47 mg/kg, which did not exceed their maximum residue limits (MRLs) in China. The HQ (0.01–11.41%) and HI (0.07–16.2%) were both less than 100%, demonstrating that chronic, acute, and cumulative dietary risks were acceptable. Notably, the risk for children (1–6 years old, 1.96–16.2%) was higher than that for the general population (0.76–6.25%). The results of our study can provide a valuable reference for regular monitoring to protect public health and ensure pesticide management.
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npj Materials Degradation
·
2023
·Vol. 7
·期 1
·1-10
·
IF 5.1
Yang Jingzhi,Ran Yami,Huang Luyao,Ren Chenhao,Hao Xiangping,Ma Lingwei,Zhang Dawei
2-hydroxyethyl methacrylate (HEMA), poly(ethylene glycol) (PEG), and zwitterionic polymers are currently considered the most extensively studied antifouling hydrogel coatings. However, systematic identification of these coatings to unleash their potential properties is tremendously under-represented. Here, we report a high-throughput optimizing strategy that combines highly miniaturized hydrogel synthesis and screening to fine design zwitterion-based hydrogel coatings. Compared with the traditional one-by-one synthesis and characterization methods, the proposed high-throughput strategy accelerated the discovery of candidate materials with a high-efficiency and cost-effective approach. To tailor multiple parameters of coatings, 1575 unique coating combinations with continuous gradients were prepared only required 600 μL reactant. The mechanical stability and drug-loading capacity of the coating spots were sequentially evaluated via immersion swelling, flow, tape-peeling, and dye-retaining tests. This strategy could efficiently reveal the composition/structure-function relationships of the hydrogel coatings and also other materials, which is promising for the rapid screening and design of desired implantable device surfaces.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3487-3504
·
IF 2.5
Liu Cansen,Wu Xianhong,Xu Jianyu,Li Jinyan,Xie Huisi
Developing a coated metal mold to avoid scuff, corrosion, and fouling in rubber vulcanization condition remains challenging. Here, a composite coating is described which combines resistance to fouling, wear, and corrosion by incorporating low surface energy tungsten disulfide (WS 2 ) into a robust cobalt (Co) matrix for wear and corrosion resistance together with antifouling. The dispersity of WS 2 in the electroplating solution is improved by combining chemical modification with mechanical milling. The addition of 2 g/L WS 2 to the electroplating bath produced a Co-WS 2 composite coating with effective tribological and anticorrosion performance in 3.5 wt.% standing NaCl solution at 25 ℃ as well as superior antifouling behavior in rubber vulcanization conducted at 160 ℃ and 9.8 Mpa. Graphical Abstract
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Science China-Technological Sciences
·
2023
·
IF 4.6
Li MingWen,Tang Chen,Yu XiXi,Shi XinLei,Yu Hui,Yin HaiYan,You Min,Chen Qiang,Ding Xi
The arch wire (AW) plays an important role in providing continuous force, aligning the teeth, and excellent dental arch stability for orthodontic treatment. However, the high friction performance of the AW surface can increase bacterial adhesion and colonization, leading to oral hygiene problems. Herein, a simple method is developed to modify the surface of the orthodontic wire with a poly(vinyl alcohol) (PVA) hydrogel coating, which can improve the lubricity and antibacterial adhesion of the AW and prevent the oral hygiene problems caused by itself. The PVA hydrogel coating can toughly adhere to the surface of the AW and remarkably reduce the friction performance of the AW, and then its friction coefficient in water can reach 0.005. Under the action of brushing and bending, the PVA hydrogel coating possesses superior ultralubrication and hardly affects the mechanical properties of the stainless-steel substrate. Moreover, the PVA hydrogel coating can significantly inhibit bacterial adhesion on the surface of the AW, thereby reducing bacterial colonization and maintaining oral hygiene while correcting the shape of the mouth and jaw. Therefore, the PVA hydrogel coating exhibits tough adhesion and good antibacterial adhesion while maintaining the mechanical properties of the AW, and it is a promising antifouling coating for improving the performance of the AW.
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