CHEMISTRY OF MATERIALS
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2024
·
IF 7.2
Meng Cao,Jisheng Song,Haonan Ren,Fan Yang,Rong Chen
With the development of integrated circuit miniaturization, the RC delay caused by the interconnect resistance of metal wires and the capacitance of interlayer dielectric materials limits the high integration and miniaturization of electronic devices. As a promising low-k dielectric material, metal–organic frameworks (MOFs) can effectively alleviate this problem. In this work, we report an atomic regulation strategy of ultralow k MIL-53 film, achieved by converting an Al2O3 seed layer deposited via atomic layer deposition (ALD) and subsequently modifying through atomic layer infiltration (ALI). Thanks to the linear relationship between the thickness of the MIL-53 film and the Al2O3 seed layer prepared by ALD, precise nanoscale control of the MIL-53 films was realized. To meet both mechanical and dielectric property requirements, ALI modification is introduced, effectively regulating Young’s modulus and hardness of MIL-53 films from 19.5 and 0.17 GPa to 29.1 and 0.36 GPa, respectively, while the dielectric constant can be tuned from 1.93 to 2.59. The reconciliation of these properties is achieved by regulating the porosity of the MIL-53 framework through the additional Al–O clusters during the ALI. Furthermore, the superhydrophobic properties (140.7°) and the nearly constant dielectric constant after 9 months of aging reflect its potential as a dielectric insulating material. The proposed preparation and modification strategy of MOF films based on atomic regulation has broad potential for application in low-k interconnect integrated circuits.
研究领域:
材料科学
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电子工程
·
纳米技术
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Nanoscale Horizons
·
2025
·
IF 6.6
Si-Ye Tong,Cong-Min Huo,Yu-Cheng Zuo,Shuo Gao,David Tai Leong,Wei Xue,Jing-Yi Zhu
Immunosuppression from the tumor microenvironment plays a key role in the failure of cancer immunotherapy. The presence of potassium ions (K+) from dying tumor cells creates an immunosuppressive environment that encourages tumor-associated macrophages (TAMs) to adopt a pro-tumor M2-like phenotype. Alleviating immune suppression from the high K+ environment might boost innate immunity and fight tumor growth. Herein, disulfide-rich mesoporous silica modified with 18-crown-6 ether was developed as a nanocarrier (D-C) to load ML133, encapsulating with the DiR-embedded macrophage membrane (CM) to create D-C/M@CM/DiR. We first saturated the phagocytosis of the mononuclear phagocyte system (MPS) with blank nanocarriers to enhance the tumor accumulation of D-C/M@CM/DiR, which was coated with the same CM. 18-Crown-6 ether captures K+ to reduce immunosuppression, while ML133 promotes the polarization of TAMs to an anti-tumor M1 phenotype by targeting the K+ channel protein Kir2.1 on their membranes. This strategy activates the anti-tumor immune response and effectively inhibits tumor growth.
研究领域:
肿瘤学
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免疫学
·
药剂学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Gang Li,Ruiyang Tan,Bohong Gao,Yuting Zhou,Chengcheng Zhang,Ping Chen,Xinyi Wang
Electromagnetic wave absorption (EMWA) materials with qualities such as low cost, thin thickness, and high efficiency are of tremendous value in addressing the challenges posed by EMW pollution. Herein, we have successfully synthesized a nanoflower-like composite from the Prussian blue analog KCoFe(CN) 6 through a combination of hydrothermal and post-annealing methods. Subsequently, we prepared the hierarchical composite CoFe-K/GC@MnO 2 @MXene (CMM) by electrostatic self-assembly with few-layered Ti 3 C 2 T x nanosheets . Their chemical compositions, microstructures, and EMWA performances were thoroughly investigated. The CMM composite demonstrated outstanding EMWA performance with an impressive minimum reflection loss ( RL min ) value of −53.0 dB at 1.68 mm and an effective absorption bandwidth (EAB) value of 4.0 GHz with an ultrathin-matching thickness of only 1.55 mm. The exceptional EMWA performance of CMM can be attributed to the increased conductive loss, enhanced interfacial polarization, and optimized impedance matching. Simulated radar cross-section (RCS) plots confirm the outstanding RSC reduction achieved by the CMM absorber coating. Furthermore, the EAB can be extended to 12.12 GHz by designing a macro 3D quadrangular frustum pyramid structural model for the absorber. The practical application potential of CMM was also enhanced by its good heat dissipation capability, which was demonstrated in real-time using an infrared thermal imager. This work provides a novel insight into developing efficient and multifunctional EMWA materials for practical applications.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2023
·
IF 9.2
Jing Zheng,Shenluo Zang,Chi Hu,Luanjie Nie,Hang Chen,Xiaokang Chu,Hao Wang,Mengtao Ma,Qingxue Lai
Modified graphite (MG) with rough edges and reduced crystal particles is developed via ball-milling treatment for commercializable K-storage anode. Importantly, rational electrolyte regulation significantly improves the reaction dynamics as well as reversibility of potassiation/depotassiation behaviors, resulting into a high and stable reversible capacity of 277 mA h g −1 at 200 mA g −1 after 250 cycles in the optimized 3 M KFSI/EC + DEC electrolyte. The enhanced K + -solvents interaction with aggregates (AGGs)-rich solvated structures is revealed to be responsible for the excellent K-storage performance. Furthermore, electrolyte flammability evaluation confirms the remarkably suppressed flammability of the optimized 3 M KFSI/EC + DEC, providing enough security for practical applications of PIBs .
研究领域:
储能
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材料科学
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电化学
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电池技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2011
·
IF 2.089
Jun Li,Yinmei Ye,Lifang Chen,Zhiwen Qi
The solubilities of CO2 in solvent poly(ethylene glycols) (PEGs) with molecular weights of 150, 200, 300, and 400 were measured over the range of pressure from (100 to 1200) kPa and temperature from (303.15 to 333.15) K. Henry's constant was obtained by linear fitting of the experimental data, and thermodynamic properties of solutions were calculated from the correlation of Henry's constant. It indicates that the solubility of CO2 increases with increasing molecular weights of PEGs. Henry's constant based on mole fraction and the molality of CO2 in PEG400 vary from (4.78 to 7.09) MPa and (1.56 to 2.48) MPa·kg·mol–1 from (303.15 to 333.15) K, respectively.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
Carbon Energy
·
2023
·
IF 20.5
Xianlu Lu,Zhao Liang,Zhi Fang,Dongdong Zhang,Yapeng Zheng,Qiao Liu,Dingfa Fu,Jie Teng,Weiyou Yang
Currently, the major challenge in terms of research on K-ion batteries is to ensure that they possess satisfactory cycle stability and specific capacity, especially in terms of the intrinsically sluggish kinetics induced by the large radius of K + ions. Here, we explore high-performance K-ion half/full batteries with high rate capability, high specific capacity, and extremely durable cycle stability based on carbon nanosheets with tailored N dopants, which can alleviate the change of volume, increase electronic conductivity, and enhance the K + ion adsorption. The as-assembled K-ion half-batteries show an excellent rate capability of 468 mA h g −1 at 100 mA g −1 , which is superior to those of most carbon materials reported to date. Moreover, the as-assembled half-cells have an outstanding life span, running 40,000 cycles over 8 months with a specific capacity retention of 100% at a high current density of 2000 mA g −1 , and the target full cells deliver a high reversible specific capacity of 146 mA h g −1 after 2000 cycles over 2 months, with a specific capacity retention of 113% at a high current density of 500 mA g −1 , both of which are state of the art in the field of K-ion batteries. This study might provide some insights into and potential avenues for exploration of advanced K-ion batteries with durable stability for practical applications.
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Journal of Energy Storage
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2023
·
IF 9.4
Jiahui Hu,Wu Tang,Yan Hong,Bangshuai Wei,Shan Jia,Meichen Guo,Chenbin Tang,Xuesong He,Cong Fan
A non-flammable potassium-ion battery is constructed by using an advanced n-type organic cathode called 2PTCDA@C and K-metal anode in triethyl phosphate electrolyte, which can show the peak discharge capacity of 125 mAh g −1 cathode in 1.5–3.5 V and stably run for 100 cycles.
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FLUID PHASE EQUILIBRIA
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2014
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IF 2.241
Keyi Wu,Yonghong Hu,Wenge Yang,Tuan Zhang,Qirun Guo,Shouhai Yang,Ying Shi
The solubility of N-Ethylcarbazole in methanol, ethanol, n-propanol, isopropanol, 1-butanol, 1-pentanol and petroleum ether was measured over the temperature range of 279.15–319.15 K at around 4 K intervals under atmospheric pressure. Experimental result showed that the solubility of N-Ethylcarbazole in seven solvents increased with the increasing temperature and they were in good agreement with the calculated solubility of the modified Apelblat equation and the λh equation. The thermodynamic properties of the solution process, including the Gibbs energy , enthalpy, and entropy were calculated by the van’t Hoff analysis. The values of both the standard molar enthalpy change and standard molar Gibbs energy change of solution were positive, which indicated that the process was endothermic.
研究领域:
物理化学
·
材料科学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Xian Sun,Jiuwu Wang,Chenguang Huang,Yingying Wang,Xiang Cheng,Yue Situ,Hong Huang
Transition metal oxides have attracted extensive research interest for supercapacitors due to efficient ion accessibility of nanostructures. Here, hierarchically hollow α-K0.2MnTi0.07O0.8 nanotubes with high K content are prepared via a self-sacrificial template method. The electrochemical performance of α-K0.2MnTi0.07O0.8 nanotubes is significantly improved when beneficial K+ is intercalated into a considerably ordered α-MnO2 phase with exchangeable Mn–K slabs by a K-pre-reserved reaction. Significantly, the α-K0.2MnTi0.07O0.8 nanotubes activated in a K2SO4 electrolyte exhibit highly capable capacitance behavior with high specific capacitance (334.5 F g–1 at 1 A g–1) and superior cycling stability (88% capacitance retention of the initial after 60,000 cycles). The well-designed α-K0.2MnTi0.07O0.8-based supercapacitor device exhibits an energy density of 25.16 Wh kg–1 at 1600 W kg–1. The morphological electrode-structured designer could be a promising attempt for applications in energy-related fields and even beyond power and storage sources.
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高影响因子
Catalysts
·
2023
·Vol. 13
·期 4
·781
·
IF 3.9
He Sun,Juping Zhang,Kongzhai Li,Hua Wang,Xing Zhu
HighlightsWhat are the main findings?A styrene yield of 91.4% was found for 10% k/CeO2at 500 °C and CO2-O2mixed atmosphere. The excellent catalytic performance of 10% k/CeO2is attributed to the alkali metal oxide modified cerium oxide and carbon dioxide induced oxygen vacancies to promote the dehydrogenation of ethylbenzene.What is the implication of the main finding?The proposed ODH strategy by using oxygen vacancies enriched catalysts offers an important insight into the efficient dehydrogenation of ethylbenzene at mild conditions.AbstractOxidative dehydrogenation (ODH) is an alternative for styrene (ST) production compared to the direct dehydrogenation process. However, ODH with O2or CO2suffers from either over-oxidation or endothermic property/low ethylbenzene conversion. Herein, we proposed an ODH process with a CO2-O2mixture atmosphere for the efficient conversion of ethylbenzene (EB) into styrene. A thermoneutral ODH is possible by the rationalizing of CO2/O2molar ratios from 0.65 to 0.66 in the temperature range of 300 to 650 °C. K modification is favorable for ethylbenzene dehydrogenation, and 10%K/CeO2achieved the highest ethylbenzene dehydrogenation activity due to the enhanced oxygen mobility and CO2adsorbability. The catalyst achieved 90.8% ethylbenzene conversion and 97.5% styrene selectivity under optimized conditions of CO2-4O2oxidation atmosphere, a temperature of 500 °C, and a space velocity of 5.0 h−1. It exhibited excellent catalytic and structural stability during a 50 h long-term test. CO2induces oxygen vacancies in ceria and promotes oxygen exchange between gaseous oxygen and ceria. The ethylbenzene dehydrogenation in CO2-O2follows a Mars-van Krevelen (MvK) reaction mechanism via Ce3+/Ce4+redox pairs. The proposed ODH strategy by using oxygen vacancies enriched catalysts offers an important insight into the efficient dehydrogenation of ethylbenzene at mild conditions.Keywords:ethylbenzene;oxidative dehydrogenation;ceria;CO2
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高影响因子
Chinese Medicine
·
2022
·Vol. 17
·期 1
·1-12
·
IF 4.546
Wang Li,Shao Li,Chen Man-Yun,Wang Lin,Zhang Wei,Tan Feng-Bo,Huang Wei-Hua
Background Ginsenoside compound K (GC-K) potentially alleviates ulcerative colitis involved in gut microbiota, which is significantly associated with the occurrence and development of colitis. However, the effect and mechanism of GC-K on anti-colitis in relation to gut microbiota are not clear. This study focused on the prevention and mechanism of GC-K on Dextran sulfate sodium (DSS)-induced colitis of mice pertinent to gut microbiota. Methods DSS was used to establish a chronic colitis mouse model. Body weight analysis, colon length measurement, HE staining, and inflammatory factors levels were processed in animal experiments. Flow cytometry was employed to analyze Th17/Treg cells in the mouse spleen and blood. 16S rRNA sequencing was utilized to analyze gut microbiota. Fecal microbiota transplantation (FMT) experiment was employed to verify the anti-colitis efficacy of GC-K by reshaping gut microbiota. Results GC-K significantly relieved colitis-related symptoms due to decreased disease activity index (DAI) scores, spleen weight, and increased colon length. Additionally, the tight junction proteins were increased, and the pro-inflammatory cytokines, such as TNF-α, IL-6, IL-1β and IL-17, were decreased after GC-K treatment. Furthermore, Bacteroides spp. significantly increased after modeling. Moreover, FMT experiments confirmed that GC-K-driven gut microbiota greatly relieved DSS-induced colitis. Conclusion GC-K alleviated colitis via the modulation of gut microbiota. Graphical Abstract
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PubMed
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FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Liang Zhang,Wenze Wang,Yongsheng Ni,Chengyuan Yang,Xinyi Jin,Yuxuan Wang,Yanyu yang,Yezi Jin,Jing Sun,Jianlong Wang
To combat the kumquat rot triggered by food-borne microorganisms, this work pioneered the concept of pseudo-pasteurization and integrated it with packaging technology to develop a novel antibacterial packaging film for the storage and preservation of kumquats. In detail, ZnO-doped carbon nanoparticles (ZnO/C) with excellent photothermal properties were first constructed by annealing the ZIF-8 precursor, and then incorporated into the K-carrageenan (KC) matrix as a filler to obtain a series of ZnO/C-KC nanocomposite films. The as-prepared ZnO/C-KC films exhibited the outstanding antibacterial properties (Antibacterial rate ≥99.8%) by virtue of the synergistic effect between NIR-induced autogenous heat and coexisting ZnO components, wherein the equilibrium temperature (60–62 °C) and holding time (5 min) of the film sterilization were significantly lower than that of the traditional pasteurization . The extended shelf-life of kumquats further confirmed the enhanced preservation capacity of ZnO/C-KC films. Furthermore, with the embedding of ZnO/C particles, although the color and transparency of films were slightly lost, the tensile strength, thermal stability, hydrophobicity, and barrier ability have been improved to varying degrees. Finally, the qualified safety of films was also verified through hemolysis and cell cytotoxicity experiments. The successful construction of this antibacterial film may provide new ideas for the innovation of traditional pasteurization and the functionalization of packaging films.
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高影响因子
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