JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 9
·1-13
·
IF 2.8
Gong Zonggui,Wang Nanlan,Guo Haoxuan,Zhu Peishu,Wang Qijing,Yu Hang,Zhang Yu,Gao Min,Zheng Xinghua
Due to the increasingly urgent safety and energy density concerns of lithium-ion batteries, more and more attention has been attracted by the Li 7 La 3 Zr 2 O 12 (LLZO)-based solid electrolytes with high ion conductivity and chemical stability against Li-metal. However, to prepare the high-quality LLZO ceramic electrolyte with high-ion conductivity and density, there is still a big challenge of the serious “Li-loss” and the abnormal grain growth during the long-time high-temperature sintering process. A novel covered sintering method is put forward to prepare the high-quality Mo-doped LLZO (LLZMO) ceramic electrolyte. The sintering strategy effectively suppresses the Li-loss to obtain the LLZMO dense ceramics with cubic garnet phase and tight grain boundaries. The LLZMO ceramics sintered at lower temperature of 1050 °C for 2 h via the novel covered sintering exhibit high density ( ρ r = 92.3%) and high-ionic conductivity of 6.08 × 10 –4 S cm −1 at 25 °C, which are close to those of LLZO-based ceramics prepared by hot pressing sintering, ultrafast high-temperature sintering (UHS). The novel covered sintering provides an energy-saving, low-cost and high-efficient strategy to prepare the high-quality LLZO-based ceramics electrolyte.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 36
·期 1
·1-14
·
IF 2.8
Han Xinghai,Song Guihong,Luo Di,Wu Yusheng,You Junhua
Mg 3 Bi 2 /Mg/Mg 2 Sn multilayer films with varying modulation periods were deposited on single crystalline Si substrate by alternating sputtering using high pure metal Mg, Mg 3 Bi 2 and Mg 2 Sn targets. The chemical and phase composition, surface and cross section image and thermoelectric performance of deposited films were observed, measured and studied. The results revealed that the deposited films were comprised of an evident layered structure containing the metal Mg, the Mg 2 Sn and the Mg 3 Bi 2 layer. The modulation period affected the carrier transport and thermoelectric properties of multilayer films. Carrier concentration, mobility, electrical conductivity and thermal conductivity of the multilayer films decreased with increasing heterogeneous interface, which severely scatter the carriers and phonon, reducing mobility and thermal conductivity. An increase in the Seebeck coefficient, power factor ( PF ), and thermoelectric figure of merit ( ZT ) was obtained by reducing modulation period. At room temperature, the film, which possessed the shortest modulation period of 677 nm, had a maximum ZT value of about 0.26. The carrier and phonon scattering processes were significantly strengthened by the more layer interface, enhancing the deposited film’s thermoelectric figure of merit.
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高影响因子
Animal Diseases
·
2021
·Vol. 1
·期 1
·1-13
·
IF 0
Yang Xiaoqi,Fu Yang,Wu Lianfeng,Li Antong,Ji Luyao,Li Hao,Peng Yuxuan,Zhang Jiabin,Zhou Donghai,Zhou Huiping
The major cause of pulmonary vascular remodeling in broilers is abnormal proliferation of vascular smooth muscle cells (VSMCs), and one of the main causes of pulmonary hypertension syndrome (PHS) in broilers is pulmonary artery vascular remodeling. Forty Arbor Acres (AA) broilers were randomly divided into four groups ( n = 10): a control group (deionized water, 0 g/L NaCl), a freshwater group (FW, deionized water + 1 g/L NaCl), highly salinized freshwater group 1 (H-SFW-1, deionized water + 2.5 g/L NaCl) and highly salinized freshwater group 2 (H-SFW-2, deionized water + 5 g/L NaCl). The results of in vivo experiments showed that vascular smooth muscle of the broilers could be significantly proliferated by intake of high-salinity fresh water (H-SFW-1 & H-SFW-2), which significantly increased the content of angiotensin II (Ang II) and the expression of angiotensin II type 1 (AT1) receptor protein. Meanwhile, it significantly decreased the expression of dopamine receptor D4 (DRD4) protein. The results of in vitro experiments showed that exogenous Ang II induced the proliferation of primary VSMCs in broilers, which could be significantly inhibited by DRD4 agonists (D4A, HY-101384A) and enhanced by DRD4 inhibitors (D4I, HY-B0965). In addition, the results of immunoblotting and fluorescence quantitative PCR showed that AT1 receptors could be negatively regulated by DRD4 in VSMCs of broilers, either at the transcriptional or translational level. At the same time, the expression of AT1 receptor could be increased by DRD4 inhibition by D4I and decreased by DRD4 activation by D4A. The negative regulatory effect of DRD4 on AT1 receptor occurred in a dose-dependent manner. These results indicate that long-term intake of highly salinized fresh water can cause PHS in broilers, accompanied by varying degrees of proliferation of pulmonary artery smooth muscle. This mechanism may involve response of its receptor being induced by increased Ang II, while DRD4 can negatively regulate it.
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Nanomanufacturing and Metrology
·
2023
·Vol. 6
·期 1
·1-11
·
IF 0
Chao Jiaqi,Chen Faze,Xia Lei,Cai Zexin,Wang Fujun,Tian Yanling,Zhang Dawei
Generally, re-entrant structures are a key part of fabricating superoleophobic surfaces, and this structure appears in almost all kinds of published research articles regarding superoleophobicity. However, the application of related fabrication methods is usually too complex and costly in real practice. In this paper, we present a simple method to generate micro-cauliflower structures, which work as re-entrant structures in microcone arrays, to promote the formation of superoleophobic surfaces. The heating process after alkali-assisted surface oxidation is the main reason for the appearance of a micro-ball structure, and the oxidation time can influence the size of the micro-ball. To the best of our knowledge, the influence of the heating process after alkali-assisted surface oxidation on the birth of the micro-ball structure is seldom researched. A low-surface-energy treatment was also analyzed in influencing the size of the re-entrant structure and its relative wettability. Droplets of 5 μl of n -decane show contact angles of 155 ± 1°on the as-prepared superoleophobic surface, and air pockets can be clearly seen underneath, indicating a stable Cassie contacting state and a promising application value in the near future.
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JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Zha Jiahao,He Chongjun,Chen Fangzhou,Wang Hongwei,Dong Biao,Liu Lijuan,Xia Mingjun,Deng Chenguang,Li Qian,Lu Yuangang,Chen Huiting
Oxide matrix red-emitting phosphors are deemed as excellent color converters for white light emitting diodes (WLEDs) and laser diodes (LDs). Manganese-doped MgAl 2 O 4 powder was synthesized by a solid-state reaction method at different sintering temperatures. Microstructure shows that grain size is mainly in the range of 0.2–5 μm, and grain agglomeration occurs with increased sintering temperature. XPS analysis indicates that the doped Mn ion exhibits a valence state of + 4 within the MgAl 2 O 4 matrix. The diffraction peak of the phosphors is shifted by the sintering temperature, which affects lattice constant. Upon excitation by 300 nm ultraviolet light, the samples emit asymmetric broadband red light within the range of 620–720 nm, attributed to Mn 4+ ion’s transition from 2 E g to 4 A 2g states. With the increasing temperature, the main emission peak shifts from 677 nm to 650 nm, ascribed to the change in energy level ( 2 E g ) resulting from the reduction of Al 2 O 3 phase. Crystal field theory confirmed that Mn 4+ ions are within a strong crystal field environment created by MgAl 2 O 4 matrix. By affecting particle size and crystallinity, the sintering temperature influences the fluorescence lifetime of the Mn 4+ ion. Notably, these red-emitting phosphors exhibits remarkable thermal stability as their emission intensity remains approximately at 58% of initial intensity even at elevated temperature (435 K). Consequently, Mn 4+ : MgAl 2 O 4 red-emitting phosphors with high thermal stability render them promising candidates for WLED applications.
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高影响因子
ARCHIVES OF MICROBIOLOGY
·
2023
·Vol. 205
·期 7
·1-12
·
IF 2.8
Meng Min,Zhai Zhaochi,Zhang Zhenxing,Kim Jeonghan,Zhu Yongzhe
In this study, the metabolic pathway of the phenylpyrazole insecticide fipronil in Cunninghamella elegans ( C. elegans ) was investigated. Approximately 92% of fipronil was removed within 5 days, and seven metabolites were accumulated simultaneously. The structures of the metabolites were completely or tentatively identified by GC–MS and 1 H, 13 C NMR. To determine the oxidative enzymes involved in metabolism, piperonyl butoxide (PB) and methimazole (MZ) were used, and the kinetic responses of fipronil and its metabolites were determined. PB strongly inhibited fipronil metabolism, while MZ weakly inhibited its metabolism. The results suggest that cytochrome P450 (CYP) and flavin-dependent monooxygenase (FMO) may participate in fipronil metabolism. Integrated metabolic pathways can be inferred from the control and inhibitor experiments. Several novel products from the fungal transformation of fipronil were identified, and similarities between C. elegans transformation and mammalian metabolism of fipronil were compared. Therefore, these results will help to gain insight into the fungal degradation of fipronil and potential applications in fipronil bioremediation. At present, microbial degradation of fipronil is the most promising approach and maintains environmental sustainability. In addition, the ability of C. elegans to mimic mammalian metabolism will assist in illustrating the metabolic fate of fipronil in mammalian hepatocytes and assess its toxicity and potential adverse effects.
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高影响因子
Nature Communications
·
2017
·Vol. 8
·期 1
·1-11
·
IF 12.124
Li Yuxiang,Yang Zaixing,Wang Yanlong,Bai Zhuanling,Zheng Tao,Dai Xing,Liu Shengtang,Gui Daxiang,Liu Wei,Chen Meng,Chen Lanhua,Diwu Juan,Zhu Lingyan,Zhou Ruhong,Chai Zhifang,Albrecht-Schmitt Thomas E.,Wang Shuao
Many environmental pollutants inherently exist in their anionic forms and are therefore highly mobile in natural water systems. Cationic framework materials that can capture those pollutants are highly desirable but scarcely reported. Here we present a mesoporous cationic thorium-based MOF (SCU-8) containing channels with a large inner diameter of 2.2 nm and possessing a high surface area of 1360 m 2 g −1 . The anion-exchange properties of SCU-8 were explored with many anions including small oxo anions like ReO 4
− and Cr 2 O 7
2− as well as anionic organic dyes like methyl blue and the persistent organic pollutant, perfluorooctane sulfonate (PFOS). Both fast uptake kinetics and great sorption selectivity toward PFOS are observed. The underlying sorption mechanism was probed using quantum mechanical and molecular dynamics simulations. These computational results reveal that PFOS anions are immobilized in SCU-8 by driving forces including electrostatic interactions, hydrogen bonds, hydrophobic interactions, and van der Waals interactions at different adsorption stages.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Xu Weiting,Jiang Jiayang,Chen Yujia,Tang Ning,Jiang Chengbao,Yang Shengxue
Two-dimensional (2D) dielectrics, integrated with high-mobility semiconductors, show great promise to overcome the scaling limits in miniaturized integrated circuits. However, the 2D dielectrics explored to date still face the challenges of low crystallinity, diminished dielectric constant, and the lack of effective synthesis methods. Here, we report the controllable synthesis of ultra-thin gadolinium oxychloride (GdOCl) nanosheets via a chloride hydrate-assisted chemical vapor deposition (CVD) method. The resultant GdOCl nanosheets display good dielectric properties, including a high dielectric constant (high-κ) of 15.3, robust breakdown field strengths ( E bd ) exceeding 9.9 MV/cm, and minimal gate leakage currents of approximately 10 −6 A/cm 2 . The top-gated GdOCl/MoS 2 field-effect transistors (FETs) exhibit commendable switch characteristics, a negligible hysteresis of ~5 mV and a subthreshold swing down to 67.9 mV dec −1 . The GdOCl/MoS 2 FETs can also be employed to construct functional logic gates. Our study underscores the significant potential of the 2D GdOCl dielectric for innovative high-speed operated nanoelectronic devices.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Li Yanhong,Zhao Wenchang,Zhou Ying,Tang Shuxian,Wang Shiyu,Zheng Yutong,Wang Zuankai,Zhu Pingan
The rebound of liquid droplets on solid surfaces exhibits behavior reminiscent of elastic spheres, albeit with distinct contact dynamics. While the rapid detachment of droplets from surfaces holds significant relevance for various applications, previous endeavors relying on engineered surfaces can only reduce the contact time to several milliseconds, primarily due to capillary effects dominating droplet bounce. Here, we present ultrafast rebound by designing heterogeneous core-shell droplets encapsulating a particle (DEP), which achieves an unprecedentedly short contact time of 0.3 ms and 0.05 ms with polydimethylsiloxane and glass particles, respectively. This remarkable contact-time reduction is universally applicable to diverse systems, including both water and oil droplets, elastic and rigid particles, super-repellent and superlyophilic surfaces, and is effective across a wide range of impact velocities. Beyond exhibiting liquid-like dynamics, DEP manifests solid-like behavior owing to asynchronized motions between the particle and the droplet, which effectively breaks down the dominance of capillarity. With systematic experimental and analytical studies, we delineate contact times in three bouncing regimes and identify critical conditions governing regime transitions. DEP amalgamates the bouncing dynamics of both solids and liquids, offering a robust and versatile strategy for tailoring contact time to suit diverse applications involving solid-liquid composite systems.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Ji Weijie,Luo Bi,Wang Qi,Yu Guihui,Zhang Zixun,Tian Yi,Zhao Zaowen,Zhao Ruirui,Wang Shubin,Wang Xiaowei,Zhang Bao,Zhang Jiafeng,Sang Zhiyuan,Liang Ji
Controllable engineering of thin lithium (Li) metal is essential for increasing the energy density of solid-state batteries and clarifying the interfacial evolution mechanisms of a lithium metal negative electrode. However, fabricating a thin lithium electrode faces significant challenges due to the fragility and high viscosity of Li metal. Herein, through facile treatment of Ta-doped Li 7 La 3 Zr 2 O 12 (LLZTO) with trifluoromethanesulfonic acid, its surface Li 2 CO 3 species is converted into a lithiophilic layer with LiCF 3 SO 3 and LiF components. It enables the thickness control of Li metal negative electrodes, ranging from 0.78 μm to 30 μm. Quasi-solid-state lithium-metal battery with an optimized 7.54 μm-thick lithium metal negative electrode, a commercial LiNi 0.83 Co 0.11 Mn 0.06 O 2 positive electrode, and a negative/positive electrode capacity ratio of 1.1 shows a 500 cycles lifespan with a final discharge specific capacity of 99 mAh g −1 at 2.35 mA cm −2 and 25 °C. Through multi-scale characterizations of the thin lithium negative electrode, we clarify the multi-dimensional compositional evolution and failure mechanisms of lithium-deficient and -rich regions (0.78 μm and 7.54 μm), on its surface, inside it, or at the Li/LLZTO interface.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-13
·
IF 5.3
Yang Peixun,Zhu Xiaoyan,Lan Hangzhen,Wu Yichun,Pan Daodong
A solid-phase microextraction (SPME) Arrow and high-performance liquid chromatography-UV detector (HPLC-UV, detection at 225 nm) based method was developed for the selective determination of nine alkylphenols (APs) in milk. The functionalized mesoporous UiO-66 (4-meso-UiO-66) was utilized as the new coating material, which was synthesized by post-modification of pore-expanded UiO-66-NH 2 by an esterification reaction with 4-pentylbenzoic acid. It was fully characterized by X-ray photoelectron spectroscopy (XPS), fourier transformation infrared spectrometry, nitrogen sorption-desorption test, scanning electron microscopy, transmission electron microscopy, and X-ray diffractometer. The characterization results showed the ester groups and benzene rings were introduced into the 4-meso-UiO-66, and the mesoporous structure was predominant in the 4-meso-UiO-66. The extraction mechanism of 4-meso-UiO-66 to APs is the synergistic effect of Zr-O electrostatic interaction and the size exclusion effect resulting from XPS, selectivity test, and nitrogen sorption-desorption test. The electrospinning technique was utilized to fabricate the 4-meso-UiO-66 coated SPME Arrow and polyacrylonitrile (PAN) was used as the adhesive. The mass rate of 4-meso-UiO-66 to PAN and the electrospinning time were evaluated. The extraction and desorption parameters were also studied. The linear range of this method was 0.2–1000 μg L –1 with a coefficient of determination greater than 0.9989 under the optimal conditions. The detection limits were 0.05–1 μg L –1 , the inter-day and intra-day precision (RSD) were 2.8–11.5%, and the recovery was 83.6%–112%. The reusability study showed that the extraction performance of this new SPME Arrow could be maintained after 80 adsorption-desorption cycles. This method showed excellent applicability for the selective determination of APs in milk. Graphical abstract
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 44
·20671-20685
·
IF 3.5
Wang Jiashuai,Wang Chengdeng,Shi Haofeng,Wang Zhaokun,Wang Zhi,Li Jin peng,Chen Xiangrui,Gao Yan,Bai Zhiming,Yan Xiaoqin
The interface instability between a Li-excess cation disordered rocksalt cathode (DRX) and sulfide solid electrolyte (SE) results in rapid capacity fade. It is well established that cathode coatings are important to mitigate the side reaction at interfaces and therefore increasing the reversible specific capacity of all-solid-state Li batteries (ASSLBs). However, internal mechanism remains blurry, and the effects of the coating layer on electrode/electrolyte interface and capacity degradation have not been fully clarified. In this work, we used various coating materials on Li 1.2 Ni 0.3 Ti 0.3 Nb 0.2 O 2 (LNTNO) cathodes to investigate the behavior of the DRX/SE interfaces. The electrochemical performances are compared of uncoated, Li 2 ZrO 3 -coated, LiNbO 3 -coated, and Li 3 BO 3 (LBO)-coated cathodes in Li 6 PS 5 Cl-based ASSLBs in long charge–discharge processes. The results demonstrate that all coated LNTNO could improve specific capacity and cycle performance. Li 3 BO 3 is identified as a superior coating with good structural stability that exhibits observably large discharge capacity (206 mAh g −1 at 10 mA g −1 ), long cycle life (100 cycles, capacity retention of 78%), as well as outstanding rate property. Combined with ex situ X-ray photoelectron spectroscopy and scanning electron microscope, we can observe the side reactions at cathode/electrolyte interface can be mitigated after the LBO coating layer, enabling fast lithium transport dynamics. This work highlights the critical role of having an appropriate coating layer and offers a promising path to enhance the electrochemical behaviors of ASSLBs. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）