JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 11
·14519-14531
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IF 2.478
Yin Hongxia,Zhao Shiyi,Hao Chuncheng,Lei Qingquan
Space charge accumulation in the insulating layers of high voltage direct current cables is the key factor that leads to their degradation and limits the operation safety. Hence, it is necessary to effectively inhibit space charge injection to these layers. In this study, a new method is proposed to suppress the charge injection to cable insulation layer: a certain amount of Li 4 Ti 5 O 12 nanopowder is doped into the semiconductive screen to enhance the internal conductive network and homogenize the electric field. The influences of Li 4 Ti 5 O 12 particles in the semiconductive composite screen on the positive temperature coefficient effect and space charge injection process are explored. The obtained results reveal that the charge quantity in the insulation layer corresponding to the minimum peak resistivity is reduced by 49.7%, 58.9%, and 46.9% after polarization at a Li 4 Ti 5 O 12 content of 4 wt% and electric field strengths of 10, 20, and 30 kV/mm, respectively.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Junjie Tang,Peiwen Liu,Xiaoling Liu,Lei Chen,Haimeng Wen,Yu Zhou,Jun Wang
Straightforward encapsulation of Pt clusters (∼2 nm) into the pure silica TON-type zeolite (ZSM-22) was reached in a dry gel conversion route, where the ionic liquid template was removed via the hydrocracking-calcination-reduction approach. The obtained Pt@ZSM-22 series possessed high crystallinity, large surface area, and ultrafine Pt clusters inside the zeolite crystals. They exhibited remarkable activity in the semi-hydrogenation of phenylacetylene into styrene; the lead sample with 0.2 wt % Pt loading afforded a large turnover number up to 117,787. The preferential high affinity of the pure silica ZSM-22-encapsulated Pt clusters toward the substrate phenylacetylene rather than the hydrogenated product was derived from the unique space-confinement effect of zeolite microchannels, which is responsible for such excellent performance.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qianwen Su,Yinying Wang,Jinghao Chen,Daohui Zhao,Huali Long,Ming Li
Organic solvent nanofiltration is a new membrane technology for separation of organic solvents with low energy consumption and environmental compatibility. However, commercial ultrafiltration membranes are unsuitable for organic solvents separation owing to their low retention and poor solvent resistance. C C bonded conjugated microporous polymer (CCMP) membranes consisting of all-rigid conjugated systems feature well-developed microporosity and excellent organic resistance. Herein, we report a strategy to prepare solvent-resistant CCMP@PTFE composite membrane by portioning channels in polytetrafluoroethylene (PTFE) ultrafiltration membrane by space-confined polymerization. Owing to intrinsic micropores from crosslinking of multifunctional rigid building units and the robustness of PTFE substrate, three CCMP@PTFE membranes exhibit outstanding separation performance, solvent resistance and high flexibility, which rival against the best of those reported membranes. This strategy inspires the design of OSN membranes with high performance.
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Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Ruan Zhang,Shuai Liu,Xianyu Hu,Yong Zhang,Yunlei Zhong,Qing Guo,Xiyuan Feng
In the post-Moore era, next-generation optoelectronics and neuromorphic computing systems require ultrawide bandgap semiconductors with tunable properties. β-Ga2O3 stands as a promising candidate, possessing a bandgap of 4.5–4.9 eV and a high critical electric field of ∼ 8 MV/cm. However, its practical application is hindered by difficulties in synthesizing high-quality 2D forms and optimizing metal–semiconductor contacts. In this study, highly crystalline ultrathin 2D β-Ga2O3 nanoflakes with improved interface quality and enhanced carrier transport dynamics were synthesized using a space-confined CVD approach. The nanoflakes exhibit excellent structural and crystalline quality, as evidenced by the characteristic peaks in Raman spectroscopy and XRD, along with the clear lattice structure observed via TEM. Metal–semiconductor–metal devices with Ti–Ti, Pd–Pd, and Ti–Pd electrode configurations were fabricated and evaluated through current–voltage and time-resolved current–time measurements. The results reveal that the Schottky barrier height at the metal–Ga2O3 interface plays a decisive role in device performance. Notably, the Ti–Ti device exhibited a distinctive two-stage photocurrent decay after light illumination ceased, attributed to defect-mediated trapping and release of photogenerated carriers. By incorporating this unique photoresponse behavior into a deep neural network, promising image recognition accuracy was achieved on the Modified National Institute of Standards and Technology data set. This work not only offers a reliable pathway for synthesizing high-quality 2D β-Ga2O3 but also demonstrates its potential for application in high-performance optoelectronics and neuromorphic computing.
研究领域:
光电子学
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材料科学
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纳米技术
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神经形态计算
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半导体器件
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Tian Li,Jiani Du,Jiaxu Sun,Qian Liu,Xinru Li,Yang Ou,Qing Qi,Yanan Liu,Fanbin Meng
Next-generation wearable electronics and stealth technologies demand lightweight, flexible materials that integrate broadband electromagnetic absorption with thermal management. Conventional microwave absorbers often suffer from narrow bandwidth, high thickness, and composition-driven limitations. Here, we introduce a bioinspired free-space architecture engineering strategy that programs hierarchical pore–cavity configurations within graphene-based fibrous textiles. Guided by cavity resonance theory, hollow fibers and aerogel fibers are fabricated via multi-axis wet-spinning and directional drying, enabling precise impedance modulation and synergistic conduction–polarization losses. The optimized architectures deliver exceptional performance: RAHF-2 achieves an effective absorption bandwidth ( EAB ) of 8.6 GHz with the minimum reflection loss value ( RL min ) = −32.8 dB, while RMAF-5-E reaches RL min = −59.1 dB and EAB = 8.5 GHz, and RMAF-10-EA exhibits strong absorption (−42.0 dB) at an ultrathin thickness of 2.0 mm. Beyond electromagnetic protection, these textiles demonstrate rapid light-to-heat conversion (65°C in 60 s), offering multifunctionality for adaptive thermal regulation. This work establishes a structural design paradigm for next-generation metamaterial textiles, bridging electromagnetic stealth, wearable protection, and intelligent thermal management.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Longkai Pan,Minggang Zhang,Hui Mei,Li Yao,Zhipeng Jin,Hongxia Liu,Shixiang Zhou,Ziyi Yao,Gangqiang Zhu,Laifei Cheng,Litong Zhang
Use of 3D photocatalytic reactor has been widely explored for development of efficient photocatalytic systems. In the present study, a bionic palisade cells BiOBr/Sr 2 Nb 2 O 7 /Al 6 Si 2 O 13 photocatalytic reactor with high strength was prepared through combination of 3D printing technology and solvothermal method. The carefully designed and optimized bionic palisade cell structure exhibited a periodic porous structure with high surface area. The controllable periodic structure effectively regulated the internal photon transfer and mass transfer. Photon transfer ensured that light is fully scattered within the structure, which improved light utilization. High mass transfer ensured smooth flow of reactant inside the structure, which increased reactant adsorption on the surface of photocatalysts. The interface electric field of the BiOBr/Sr 2 Nb 2 O 7 p-n heterojunction effectively separated the photogenerated electrons and holes. The BOB/SNO/ASO structure had high photocatalytic CO 2 reduction performance under the simulated sunlight. The CO yield for the reaction was 13.68 μmol/g/h, whereas that of CH 4 yield was 6.37 μmol/g/h. Therefore, the findings of the present study provide a basis for design and preparation of high-performance 3D photocatalytic reactors.
研究领域:
材料科学
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环境科学
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化学工程
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光催化
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jian Kong,Kaixiang Liang,Wenying Shi,Chao Lu
Solution-processed polycrystalline perovskites (PVKs) have aroused tremendous interest in the optoelectronic device field. However, the inherent high-density defects in the polycrystalline hindered achieving efficient and stable large-area PVK solar cells (PSCs). Although organic molecules are already employed to passivate PVK defects, they are insulating by nature, limiting the carrier transport. Here, we design an assembly of a small molecule (N,N′-di(propanoic acid)-perylene-3,4,9,10-tetracarboxylic diamide, PDI) via confinement-assisted supramolecular polymerization technology, which is used as a binder for grain boundaries to simultaneously passivate defects and promote carrier transport. The synergistic effect allows the efficiency of all-air processed carbon-based PSCs to reach a decent power conversion efficiency of 14.17%. Importantly, the as-prepared supramolecular assembly completely breaks through the insulating nature of the single molecule, which exists in the long-term defect passivation of PSCs by organic molecules. It is expected that this finding may provide novel design ideas to apply the assemblies to improve the performance of PSCs.
研究领域:
材料科学
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化学
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光子学
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太阳能
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Small Methods
·
2023
·Vol. 7
·期 10
·2300394
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IF 12.4
Yuhao Geng,Haoyang Hu,Yongqi Jia,Xintong Huang,Tian Yang,Runzhe Liang,Zhuo Chen,Zhihong Yuan,Jianhong Xu
Lead halide perovskite nanocrystals (LHP NCs) have the characteristics of fast reaction kinetics and crystal instability due to the intrinsically highly ionic bonding between the respective ions, which bring challenges for revealing the growth kinetics and practical applications. Compared with conventional batch synthesis methods, the single-function microreactor can achieve precise and stable control of the NCs synthesis process, but it still has the shortcoming of not being able to obtain information about the growth process. In this study, a micro Total Reaction System (μTRS) with remote control, online detection, and rapid data analysis functions is designed. μTRS can sample the photoluminescence information of CsPbBr 3 NCs growth in ligand-assisted reprecipitation method. CsPbBr 3 NCs with an emission range of 435–492 nm are successfully detected, which breaks the record of the smallest size of CsPbBr 3 NCs synthesized directly from precursors. The real-time feature of μTRS enables the construction of an automated close-loop synthesis system. Besides, the rapid acquisition and timely processing of product information enable the rapid mapping of the operation space for CsPbBr 3 NCs preparation, which provides a reliable and learnable data set for designing a fully autonomous microreaction system capable of synthesizing NCs.
研究领域:
材料科学
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化学工程
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纳米技术
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光电子学
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Polymers
·
2025
·Vol. 17
·期 5
·680
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IF 4.9
Haisheng Wu,Yizhuo Gu,Xinyu Liu,Chaobo Xin
Frontal polymerization (FP) technology has attracted significant attention as an efficient, low-energy curing method for thermosetting resins. By enabling self-sustaining polymerization reactions, FP significantly reduces curing time and minimizes external energy dependence, making it ideal for in-orbit manufacturing applications. In contrast to traditional curing methods, which are limited by high energy consumption and low efficiency, FP offers a more efficient and flexible alternative. Nonetheless, the FP process is sensitive to material composition, processing and environmental factors, requiring systematic studies to enhance performance. This work focuses on reaction mechanisms, curing kinetics and processing factors of a self-developed FP epoxy resin system. The revealed curing mechanism and kinetics reveals a high initiation energy barrier and rapid curing characteristics, showing appropriate reaction inertness before initiation and stable reaction without continuous external energy input. The influences of initiator concentration and epoxy resin type on polymerization rate and the properties of cured resin were examined. Additionally, a curing simulation method validated by the experiment were employed to analyze the effects of mold material, resin cross-sectional area, initial temperature and environmental conditions on polymerization behavior. The results provide valuable insights for optimizing FP, advancing the understanding of the curing process and improving resin performance in space-based applications.
研究领域:
材料科学
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化学工程
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航天技术
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高影响因子
Insects
·
2025
·Vol. 16
·期 8
·804
·
IF 2.9
Lina Pan,Wenfang Gao,Zhiqin Song,Xiaoyu Li,Yipeng Wei,Guangyan Qin,Yiping Hu,Zeyang Sun,Cuiqing Gao,Penghua Bai,Gengping Zhu,Wenjie Wang,Min Li
Simple SummaryThe tri-trophic interactions among the fall webworm (Hyphantria cunea), its host plants, and its parasitoid wasp (Chouioia cunea) were investigated, with particular focus on the correlation betweenH. cunea’s host plant preference and the attractiveness of these plants toC. cunea. It was found thatMorus alba, despite providing suboptimal nutritional quality forH. cunealarvae, became the most preferred host plant due to its significantly reduced attraction toC. cuneacompared to alternative host species. Through volatile analysis,M. albawas identified to lack tridecane emission, a key semiochemical that attractsC. cunea. These results demonstrate adaptive host selection behavior inH. cuneathat minimizes parasitism risk, providing novel insights for refining biological control strategies against this invasive species.Plants and insects are developing strategies to avoid each other’s defense systems. Host plants may release volatile compounds to attract the natural enemies of herbivores; insect pests may also select host plants that are deterrent to natural enemies to avoid such predation. Here we investigated whether the host plant preference ofHyphantria cuneacorrelates with the attractiveness of these plants toChouioia cunea, a parasitoid wasp that serves as the primary natural enemy ofH. cunea. We foundMorus albawas the preferred host plant for femaleH. cunea. AlthoughM. albaprovided suboptimal nutritional value forH. cuneagrowth and development compared to other plants, it attracted fewerC. cunearelative to alternative host plants. Gas chromatography–mass spectrometry (GC–MS) coupled with gas chromatography–electroantennographic detection (GC-EAD) analysis identified six distinct compounds among the herbivore-induced plant volatiles (HIPVs) produced followingH. cuneafeeding. Notably,M. albawas the sole plant species that did not emit tridecane. These results suggest thatH. cuneautilizesM. albaas a reduced predation enemy-free space, thereby minimizing parasitization byC. cunea. Our research emphasizes the importance of considering adaptive responses of herbivores within the context of multi-trophic relationships, rather than solely focusing on optimizing herbivore growth on the most nutritionally suitable plant host.
研究领域:
生态学
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昆虫行为学
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化学生态学
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生物防治
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入侵生物学
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 21
·2314954
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IF 18.5
Shuixin Xia,Wenxuan Fan,Zhen Hou,Chenrui Li,Zongyan Jiang,Junhe Yang,Jianfeng Mao,Shiyou Zheng
The practical application of sodium (Na) metal anode has been seriously hindered by the uncontrolled Na dendrite growth and severe volume expansion inducing short battery lifespan and safety concerns. Here, highly sodiophilic and ultrafine ZnS-modified carbon fibers have been rationally constructed as a scaffold to obviate these drawbacks. The in situ generated Na 2 S-reinforced fast ion transport interphase and the effective space confinement synergistically facilitate the fast sodium ion interfacial transfer and the homogeneous and dendrite-free Na deposition, thus enabling high-rate and dendrite-free Na metal anode. The modified Na metal demonstrates ultrahigh rate capability (15 mA cm −2 ) and ultralong cycling life (5300 cycles). Moreover, the Na|Na 3 V 2 (PO 4 ) 3 (NVP) cell delivers ultrahigh rate capability (80 C) and extraordinarily ultralong lifespan cycling durability (2980 cycles). The Na|NVP pouch cell also exhibits an extraordinarily ultralong-term cycle life of over 1070 cycles with an extremely low capacity decay rate of 0.0088% per cycle at 10 C. This work provides a facile and efficient strategy to propel the Na metal anode towards practicability.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wen-Rui Li,Xiong Yang,Guang-Yu Sun,Yu-Cheng Zhang,Hao-Yan Liu,Xiao-Gang Qin,Bai-Peng Song,Guan-Jun Zhang
Improving the surface insulation strength of substrate material polyimide (PI) is an effective strategy to suppress charging and discharging effects of spacecraft solar arrays. To meet the insulation requirements of next-generation spacecraft with higher voltage levels, the surface insulation of PI must be further improved. Herein, we propose an approach to control the surface roughness and pore distribution of PI using a pore-forming agent. Modulating surface roughness and pore distribution effectively suppresses secondary electron emission avalanches, greatly enhancing surface insulation strength. When the pore-forming agent addition ratio is 50%, the film features the highest flashover threshold of 55.93 kV, a 201.7% improvement over the PI films currently used in spacecraft. The maximum secondary electron yield decreased from 2.01 to 1.32. Additionally, this novel porous PI film is exceptionally lightweight and possesses excellent electrical and thermal properties. The thermal equilibrium temperature is up to 13.44% lower than that of PI films currently used in spacecraft. Even after high- and low-temperature thermal shock, its mechanical properties and flashover performance remain highly stable. The novel polyimide films hold great potential for future applications in insulation of space solar arrays.
研究领域:
材料科学
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航天工程
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高分子材料
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电气绝缘
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热控材料
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高影响因子
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