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Vanadium nitride/carbon fiber engineered with oxygen defects and vertically aligned nanosheets for high-rate flexible aqueous zinc-ion batteries 认领 引用
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作者 Zhouyang Qin Gaoxu Han +4 位作者 Yilin Yang Wenjie Zhang Ruitao Lv Wanci Shen Zheng-Hong Huang 《Energy Materials and Devices》 CAS 2026年第1期48-60,共13页
Flexible aqueous zinc-ion batteries(AZIBs)are promising candidates for wearable devices owing to their high safety and low cost.However,their progress is plagued by their sluggish ion-transport kinetics,which leads to... Flexible aqueous zinc-ion batteries(AZIBs)are promising candidates for wearable devices owing to their high safety and low cost.However,their progress is plagued by their sluggish ion-transport kinetics,which leads to inferior rate capability.Herein,a vanadium nitride/carbon fiber(VN/CF)cathode was structurally engineered to incorporate oxygen defects and a vertically aligned,porous,nanosheet architecture to overcome these issues.This structure was realized via the initial growth of vertically aligned V2O5 nanosheet templates on gas-spun carbon fibers,followed by high-temperature NH3 treat-ment.The oxygen defects accelerate the kinetics of bulk diffusion within VN,while the vertically aligned VN nanosheet array possesses lower charge-transfer resistance,enhancing the kinetics of surface diffusion.These features synergisti-cally improve the overall Zn2+transport,affording high-rate performance.Consequently,the free-standing VN/CF cathode exhibits exceptional rate performance,delivering a capacity of 263.4 mAh g−1even at a high current density of 10 A g−1.When assembled into flexible AZIBs,the device exhibits a high-rate capability of 249.7 mAh g−1at 10 A g−1and stable performance even under various bending deformations,demonstrating significant potential for next-generation wearable devices. 展开更多
关键词 aqueous zinc-ion batteries oxygen defects vertically aligned porous nanosheet high-rate performance
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Electrohydrodynamic bioprinting-induced orientation of cell-laden fibrin-alginate hydrogel for highly-aligned skeletal muscle constructs 认领 引用 被引量：1
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作者 Ayiguli Kasimu Zijie Meng +11 位作者 Zhennan Qiu Yabo Zhang Lang Bai Xiao Tan Ziyu Wang Ruosen Zhao Qianxi Gao Hui Zhu Zhanguo Tong Wurikaixi Aiyiti Dichen Li Jiankang He 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期695-714,共20页
Bioprinting provides an unparalleled tool for engineering living tissue constructs that mimic the structural organization of native skeletal muscles.However,it remains a challenge for existing bioprinting strategies t... Bioprinting provides an unparalleled tool for engineering living tissue constructs that mimic the structural organization of native skeletal muscles.However,it remains a challenge for existing bioprinting strategies to recapitulate the highly aligned cellular architectures inside skeletal muscles,primarily due to low printing resolution and limited capability for in situ microenvironmental regulation.Here,we propose to employ the electrical force during the electrohydrodynamic(EHD)bioprinting process to induce the in situ orientation of cell-laden fibrin-alginate hydrogel,which provides nanostructural guidance to the encapsulated cells for the formation of highly aligned skeletal muscle constructs.It was observed that the randomly distributed fibrin protofibril aggregates gradually elongated into uniformly aligned nanofibers at the Taylor cone stage as the applied voltage increased to 3 kV.The oriented fibrin nanofibers further direct in situ cellular alignment along the EHD bioprinting trajectory,facilitating the freeform fabrication of parallelly or circumferentially aligned muscle tissue constructs in vitro.The addition of conductive polymers into the fibrin-alginate hydrogel endows the EHD-bioprinted living constructs with muscle-specific conductivity and cellular organization,which promote myotube differentiation and maturation.The resultant aligned and conductive muscle constructs promoted in situ muscle regeneration and restored lost muscle functions at the defect regions in vivo.The presented EHD bioprinting strategy for fibrin-alginate hydrogel provides a versatile and simple platform to freely fabricate conductive,living tissue constructs with designer cellular alignments. 展开更多
关键词 electrohydrodynamic bioprinting in situ fibrin orientation cell alignment conductive hydrogel muscle tissue engineering
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Vertically Aligned Ion Pathways for Fast Conduction and Uniform Lithium Deposition in Solid-State Batteries 认领 引用
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作者 Sha Peng Jia Chen +5 位作者 Yu Li Ying Tao Lei Zhang Jiyan Liu Zhihong Liu Xueqing Liu 《Carbon Energy》 SCIE EI CAS CSCD 2026年第3期41-54,共14页
The random distribution of one-dimensional nanofillers in composite polymer electrolytes(CPEs) typically results in tortuous ion transport pathways,severely limiting ionic conductivity and Li+ flux uniformity.Herei... The random distribution of one-dimensional nanofillers in composite polymer electrolytes(CPEs) typically results in tortuous ion transport pathways,severely limiting ionic conductivity and Li+ flux uniformity.Herein,an innovative electric field-assisted strategy is proposed to construct vertically aligned ion channels in CPEs using lithiated halloysite nano tubes(HNTs-SO3Li)embedded within a polyurethane acrylate/polyethylene glycol diacrylate(PUA/PEGDA) matrix.Under an alternating electric field,the nanotubes orient perpendicularly,forming continuous,low-tortuosity pathways that significantly enhance roomtemperature ionic conductivity.The aligned structure not only shortens Li+transport distances but also homogenizes ion flux at the electrode interface,effectively suppressing lithium dendrite growth.Electrochemical characterization reveals exceptional stability.Three-dimensional structural reconstruction and ion transport simulations further demonstrate that the ordered channels promote uniform Li+distribution and faster ion kinetics compared to disordered systems.This study provides a scalable and efficient approach to designing high-performance CPEs for next-generation solid-state batteries,addressing critical challenges in ionic conductivity,interfacial stability,and dendrite suppression. 展开更多
关键词 alignment composite polymer electrolytes fast Li+conduction uniform lithium deposition
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Highly ionic conductive composite membrane electrolyte with vertically aligned structure and radial gradient copolymer for high-performance solid-state lithium metal batteries 认领 引用
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作者 Sida Xie Ningxin Chen +5 位作者 Jie Deng Ying-Jie Zhu Long Cheng Dandan Li Heng Li Zhaohui Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第7期939-950,共12页
Solid-state polymer electrolytes are crucial for advancing solid-state lithium-metal batteries owing to their flexibility,excellent manufacturability,and strong interfacial compatibility.However,their widespread appli... Solid-state polymer electrolytes are crucial for advancing solid-state lithium-metal batteries owing to their flexibility,excellent manufacturability,and strong interfacial compatibility.However,their widespread applications are hindered by low ionic conductivity at room temperature and lithium dendrite growth.Herein,we report a novel solid-state composite membrane electrolyte design that combines the vertically aligned channel structure and copolymer with a radial gradient composition.Within the vertically aligned channels,the composition of poly(vinyl ethylene carbonate-co-poly(ethylene glycol)diacrylate)(P(VEC-PEGDA)varies in a gradient along the radial direction:from the center to the wall of vertically aligned channels,the proportion of vinyl ethylene carbonate(VEC)in the copolymer decreases,while the proportion of poly(ethylene glycol)diacrylate(PEGDA)increases accordingly.It can be functionally divided into a mechanical-reinforcement layer and a fast-ion-conducting layer.The resulting solid-state composite membrane electrolyte achieves a high critical current density of 1.2 mA cm-2and high ionic conductivity of 2.03 mS cm-1at room temperature.Employing this composite membrane electrolyte,a Li//Li symmetric cell exhibits stable cycling for over 1850 h at 0.2 m A cm-2/0.2 m A h cm-2,and a Li//LiFePO4(LFP)battery maintains 77.3% capacity retention at 2 C after 300 cycles.Our work provides insight into the rational design of safer and more efficient solidstate batteries through electrolyte structural engineering. 展开更多
关键词 Vertically aligned channel structure Radial gradient copolymer Solid-state polymer electrolyte Ultralong hydroxyapatite nanowires Fast-ion-conducting
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Biomimetic and Compressible Wood Phase Change Gel With Hierarchically Aligned Lamellar Structure for Controlled Thermal Management 认领 引用
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作者 Jiazuo Zhou Yifan Liu +11 位作者 Xinbei Jia Yudong Li Xiaohan Sun Xinyao Ji Yuan Yu Taikun Yao Zhuoer Li Jian Li Haiyue Yang Yao Xiao Wentao Gan Chengyu Wang 《Carbon Energy》 SCIE EI CSCD 2025年第10期40-53,共14页
The recovery and utilization of ubiquitous low-grade heat are crucial for mitigating the fossil energy crisis.However,uncontrolled spontaneous heat dissipation limits its practical application.Inspired by skeletal mus... The recovery and utilization of ubiquitous low-grade heat are crucial for mitigating the fossil energy crisis.However,uncontrolled spontaneous heat dissipation limits its practical application.Inspired by skeletal muscle thermogenesis,we develop a compressible wood phase change gel with mechano-controlled heat release by infiltrating xylitol gel into wood aerogel.The xylitol gel can store recovered low-grade heat for at least 1 month by leveraging its inherent energy barrier.The hierarchically aligned lamellar structure of wood aerogel facilitates mechanical adaptation,hydrogen bond formation,and energy dissipation between the wood aerogel and the xylitol gel,increasing the compressive strength and toughness of wood phase change gel fivefold compared to xylitol gel.This enhancement effect enables repetitive contact-separation motions between the wood phase change gel and the substrate during radial compression,overcoming the energy barrier and releasing approximately 178.6 J g−1 of heat.As a proof-of-concept,the wood phase change gel serves as the hot side in a thermoelectric generator,providing about 2.13 W m−2 of clean electricity by the controlled utilization of recovered solar heat.This study presents a sustainable method to achieve off-grid electricity generation through the controlled utilization of recovered low-grade heat. 展开更多
关键词 aligned lamellar structure biomimetic material compressible wood gel controlled thermal management phase change material
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Experimental manipulation of fine structures in high harmonic spectrum of aligned CO2 molecules 认领 引用
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作者 Ge-Wen Wang Yi-Wen Zhao +5 位作者 Yi-Chen Wang Jing Ma Bo-Dun Liu Wei Jiang Hong-Jing Liang Ri Ma 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第6期132-136,共5页
Molecular high-order harmonic spectroscopy is a significant advancement in ultrafast science, enabling the measurement of multielectron dynamics with attosecond temporal resolution. The fine structures observed in the... Molecular high-order harmonic spectroscopy is a significant advancement in ultrafast science, enabling the measurement of multielectron dynamics with attosecond temporal resolution. The fine structures observed in the molecular harmonic spectrum provide crucial insights into the structural or multielectron dynamical effects induced by intense laser fields. In this study, we measure the high-order harmonic spectrum of aligned CO2 molecules contributed from short trajectories. Two distinct groups of minima are identified in the plateau region. Our findings indicate that the deeper-lying molecular orbitals and two-center interference play significant roles in molecular harmonic generation. The results pave the way for advancing the understanding of multielectron dynamics in polyatomic molecules under intense laser fields. 展开更多
关键词 high-order harmonic generation aligned molecule multielectron effect
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Reducing Critical Raw Material Use in Commercial Solid Oxide Fuel Cells Using Vertically Aligned Thin-Film Cathodes with Enhanced Long-Term Stability 认领 引用
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作者 Matthew P.Wells Kosova Kreka +8 位作者 Mohana V.Kante Miriam Botros Ozden Celikbilek Jan Pieter Ouweltjes Federico Baiutti Simon M.Fairclough Caterina Ducati Albert Tarancon Judith L.MacManus-Driscoll 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第4期289-295,共7页
Solid oxide fuel cells(SOFCs)are widely presented as a sustainable solution to future energy challenges.Nevertheless,solid oxide fuel cells presently rely on significant use of several critical raw materials to enable... Solid oxide fuel cells(SOFCs)are widely presented as a sustainable solution to future energy challenges.Nevertheless,solid oxide fuel cells presently rely on significant use of several critical raw materials to enable optimized electrode reaction kinetics.This challenge can be addressed by using thinfilm electrode materials;however,this is typically accompanied by complex device fabrication procedures as well as poor mechanical/chemical stability.In this work,we conduct a systematic study of a range of promising thin-film electrode materials based on vertically aligned nanocomposite(VAN)thin films.We demonstrate low area specific resistance(ASR)values of 0.44 cm2 at 650℃ can be achieved using(La0.60Sr0.40)0.95Co0.20Fe0.80O3-(Sm2O3)0.20(CeO2)0.80(LSCF-SDC)thin films,which are also characterized by a low degradation rate,approximately half that of planar LSCF thin films.We then integrate these(La0.60Sr0.40)0.95Co0.20Fe0.80O3-(Sm2O3)0.20(CeO2)0.80 vertically aligned nanocomposite films directly with commercial anode supported half cells through a single-step deposition process.The resulting cells exhibit peak power density of 0.47W cm-2 at 750℃,competitive with 0.64W cm-2 achieved for the same cells operating with a bulk(La0.60Sr0.40)0.95Co0.20Fe0.80O3 cathode,despite 99.5% reduction in cathode critical raw material use.By demonstrating such competitive performance using thin-film cathode functional layers,this work also paves the way for further cost reductions in solid oxide fuel cells,which could be achieved by likewise applying thin-film architectures to the anode functional layer and/or current collecting layers,which typically account for the greatest materials cost in solid oxide fuel cell stacks.Therefore,the present work marks a valuable step towards the sustainable proliferation of solid oxide fuel cells. 展开更多
关键词 solid oxide fuel cells thin films vertically aligned nanocomposites
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Improved polymer electrolyte interfacial contact via constructing vertically aligned fillers 认领 引用
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作者 Xu Li Yue Zhao Tingli Ma 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2025年第2期1-2,共2页
High-performance lithium metal batteries benefit from the construction of composite polymer electrolytes(CPEs)which are synthesized by incorporating inorganic fillers into polymer matrices[1].However,the random distri... High-performance lithium metal batteries benefit from the construction of composite polymer electrolytes(CPEs)which are synthesized by incorporating inorganic fillers into polymer matrices[1].However,the random distribution of added fillers within the polymer matrix can lead to tortuous ion pathways and longer transmission distances(Fig.1).As a result,the ion transport capability of CPEs may decrease,while interface contact may deteriorate.Therefore,the organized arrangement of fillers emerges as a crucial consideration in constructing electrolyte membranes.One highly effective approach is the adoption of a vertically aligned filler configuration,where ceramic fillers are constructed to be perpendicular to the electrolyte membrane.If so,the filler/electrolyte interface impedance can be significantly reduced,while continuous ion transport channels along the specified direction are formed,thus significantly enhancing the ion conduction(Fig.1(a))[1]. 展开更多
关键词 polymer matrix composite polymer electrolytes composite polymer electrolytes cpes which incorporating inorganic fillers polymer matrices howeverthe lithium metal batteries vertically aligned fillers interface contact ion transport
Printable Aligned Single-Walled Carbon Nanotube Film with Outstanding Thermal Conductivity and Electromagnetic Interference Shielding Performance 认领 引用 被引量：24
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作者 Zhihui Zeng Gang Wang +8 位作者 Brendan F.Wolan Na Wu Changxian Wang Shanyu Zhao Shengying Yue Bin Li Weidong He Jiurong Liu Joseph W.Lyding 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第11期143-156,共14页
Ultrathin,lightweight,and flexible aligned single-walled carbon nanotube(SWCNT)films are fabricated by a facile,environmentally friendly,and scalable printing methodology.The aligned pattern and outstanding intrinsic ... Ultrathin,lightweight,and flexible aligned single-walled carbon nanotube(SWCNT)films are fabricated by a facile,environmentally friendly,and scalable printing methodology.The aligned pattern and outstanding intrinsic properties render“metal-like”thermal conductivity of the SWCNT films,as well as excellent mechanical strength,flexibility,and hydrophobicity.Further,the aligned cellular microstructure promotes the electromagnetic interference(EMI)shielding ability of the SWCNTs,leading to excellent shielding effectiveness(SE)of~39 to 90 dB despite a density of only~0.6 g cm−3 at thicknesses of merely 1.5-24μm,respectively.An ultrahigh thickness-specific SE of 25693 dB mm−1 and an unprecedented normalized specific SE of 428222 dB cm2g−1 are accomplished by the freestanding SWCNT films,significantly surpassing previously reported shielding materials.In addition to an EMI SE greater than 54 dB in an ultra-broadband frequency range of around 400 GHz,the films demonstrate excellent EMI shielding stability and reliability when subjected to mechanical deformation,chemical(acid/alkali/organic solvent)corrosion,and high-/low-temperature environments.The novel printed SWCNT films offer significant potential for practical applications in the aerospace,defense,precision components,and smart wearable electronics industries. 展开更多
关键词 Aligned film Single-walled carbon nanotube Lightweight Flexible Thermal conductivity Electromagnetic interference shielding
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Highly Aligned Graphene Aerogels for Multifunctional Composites 认领 引用 被引量：16
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作者 Ying Wu Chao An +4 位作者 Yaru Guo Yangyang Zong Naisheng Jiang Qingbin Zheng Zhong‑Zhen Yu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第6期276-342,共67页
Stemming from the unique in-plane honeycomb lattice structure and the sp2hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,an... Stemming from the unique in-plane honeycomb lattice structure and the sp2hybridized carbon atoms bonded by exceptionally strong carbon–carbon bonds,graphene exhibits remarkable anisotropic electrical,mechanical,and thermal properties.To maximize the utilization of graphene’s in-plane properties,pre-constructed and aligned structures,such as oriented aerogels,films,and fibers,have been designed.The unique combination of aligned structure,high surface area,excellent electrical conductivity,mechanical stability,thermal conductivity,and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions,enabling advancements in diverse fields.This review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their composites.It highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and quantitatively.The oriented scaffolds endow graphene aerogels and their composites with anisotropic properties,showing enhanced electrical,mechanical,and thermal properties along the alignment at the sacrifice of the perpendicular direction.This review showcases remarkable properties and applications of aligned graphene aerogels and their composites,such as their suitability for electronics,environmental applications,thermal management,and energy storage.Challenges and potential opportunities are proposed to offer new insights into prospects of this material. 展开更多
关键词 Highly aligned graphene aerogels Quantitative characterization of alignment Multifunctional composites Anisotropic properties Multifunctional applications
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Significantly Enhanced Electromagnetic Interference Shielding Performances of Epoxy Nanocomposites with Long-Range Aligned Lamellar Structures 认领 引用 被引量：28
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作者 Lei Wang Zhonglei Ma +3 位作者 Hua Qiu Yali Zhang Ze Yu Junwei Gu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2022年第12期617-629,共13页
High-efficiency electromagnetic interference(EMI)shielding materials are of great importance for electronic equipment reliability,information security and human health.In this work,bidirectional aligned Ti3C2T_(... High-efficiency electromagnetic interference(EMI)shielding materials are of great importance for electronic equipment reliability,information security and human health.In this work,bidirectional aligned Ti3C2Tx@Fe3O4/CNF aerogels(BTFCA)were firstly assembled by bidirectional freezing and freeze-drying technique,and the BTFCA/epoxy nanocomposites with long-range aligned lamellar structures were then prepared by vacuum-assisted impregnation of epoxy resins.Benefitting from the successful construction of bidirectional aligned three-dimensional conductive networks and electromagnetic synergistic effect,when the mass fraction of Ti3C2Txand Fe3O4are 2.96 and 1.48 wt%,BTFCA/epoxy nanocomposites show outstanding EMI shield-ing effectiveness of 79 dB,about 10 times of that of blended Ti3C2Tx@Fe3O4/epoxy(8 dB)nanocomposites with the same loadings of Ti3C2Txand Fe3O4.Meantime,the corresponding BTFCA/epoxy nanocomposites also present excellent thermal stability(T_(heat-resistance index)of 198.7℃)and mechanical properties(storage modulus of 9902.1 MPa,Young’s modulus of 4.51 GPa and hardness of 0.34 GPa).Our fabricated BTFCA/epoxy nanocomposites would greatly expand the applications of MXene and epoxy resins in the fields of information security,aerospace and weapon manufacturing,etc. 展开更多
关键词 Electromagnetic interference shielding Epoxy nanocomposites Ti3C2Tx Fe3O4 Bidirectional aligned three-dimensional conductive networks
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Experimental investigation and correlation development of jet impingement heat transfer with two rows of aligned jet holes on an internal surface of a wing leading edge 认领 引用 被引量：10
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作者 Jia YU Long PENG +3 位作者 Xueqin BU Xiaobin SHEN Guiping LIN Lizhan BAI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2018年第10期1962-1972,共11页
Extensive experimental studies on the heat transfer characteristics of two rows of aligned jet holes impinging on a concave surface in a wing leading edge were conducted, where50000 Rej 90000, 1.74 H/d 27.5, 66° ... Extensive experimental studies on the heat transfer characteristics of two rows of aligned jet holes impinging on a concave surface in a wing leading edge were conducted, where50000 Rej 90000, 1.74 H/d 27.5, 66° a 90°, and 13.2 r/d 42.03. The finding was that the heat transfer performance at the jet-impingement stagnation point with two rows of aligned jet holes was the same as that with a single row of jet holes or the middle row of three-row configurations when the circumferential angle of the two jet holes was larger than 30°. The attenuation coefficient distribution of the jet impingement heat transfer in the chordwise direction was so complicated that two zones were divided for a better analysis. It indicated that： the attenuation coefficient curve in the jet impingement zone exhibited an approximate upside-down bell shape with double peaks and a single valley; the attenuation coefficient curve in the non-jet impingement zone was like a half-bell shape, which was similar to that with three rows of aligned jet holes; the factors,including Rej, H/d and r/d, affected the attenuation coefficient value at the valley significantly.When r/d was increased from 30.75 to 42.03, the attenuation rates of attenuation coefficient increased only by 1.8%. Consequently, experimental data-based correlation equations of the Nusselt number for the heat transfer at the jet-impingement stagnation point and the distributionof the attenuation coefficient in the chordwise direction were acquired, which play an important role in designing the wing leading edge anti-icing system with two rows of aligned jet holes. 展开更多
关键词 Correlation Experiment Jet impingement heat transfer Two rows of aligned jet holes Wing anti-icing
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Near-perfect fidelity polarization-encoded multilayer optical data storage based on aligned gold nanorods 认领 引用 被引量：13
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作者 Linwei Zhu Yaoyu Cao +5 位作者 Qiuqun Chen Xu Ouyang Yi Xu Zhongliang Hu Jianrong Qiu Xiangping Li 《Opto-Electronic Advances》 SCIE EI CAS 2021年第11期55-63,共9页
Encoding information in light polarization is of great importance in facilitating optical data storage(ODS)for information security and data storage capacity escalation.However,despite recent advances in nanophotonic ... Encoding information in light polarization is of great importance in facilitating optical data storage(ODS)for information security and data storage capacity escalation.However,despite recent advances in nanophotonic techniques vastly en-hancing the feasibility of applying polarization channels,the data fidelity in reconstructed bits has been constrained by severe crosstalks occurring between varied polarization angles during data recording and reading process,which gravely hindered the utilization of this technique in practice.In this paper,we demonstrate an ultra-low crosstalk polarization-en-coding multilayer ODS technique for high-fidelity data recording and retrieving by utilizing a nanofibre-based nanocom-posite film involving highly aligned gold nanorods(GNRs).With parallelizing the gold nanorods in the recording medium,the information carrier configuration minimizes miswriting and misreading possibilities for information input and output,respectively,compared with its randomly self-assembled counterparts.The enhanced data accuracy has significantly im-proved the bit recall fidelity that is quantified by a correlation coefficient higher than 0.99.It is anticipated that the demon-strated technique can facilitate the development of multiplexing ODS for a greener future. 展开更多
关键词 optical data storage aligned gold nanorods fidelity nanocomposite film
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Vertically aligned W(Mo)S2/N-W(Mo)C-based light-assisted electrocatalysis for hydrogen evolution in acidic solutions 认领 引用 被引量：11
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作者 Lan-Fang Wang Rui-Xia Yang +3 位作者 Jin-Zhi Fu Yue-Yue Cao Rui-Fang Ding Xiao-Hong Xu 《Rare Metals》 SCIE EI CAS CSCD 2023年第5期1535-1544,共10页
The development of non-noble-metal hydrogen evolution electrocatalysts holds great promises for a sustainable energy system.Here,a hybrid W(Mo)S2/NW(Mo)C nanosheet with array structures was reported for an efficien... The development of non-noble-metal hydrogen evolution electrocatalysts holds great promises for a sustainable energy system.Here,a hybrid W(Mo)S2/NW(Mo)C nanosheet with array structures was reported for an efficient light-as sis ted hydrogen evolution electrocatalysts in acidic solutions.The resulting vertically aligned W(Mo)S2/N-W(Mo)C was supported on a conductive carbon fiber paper,which can be produced through annealing W(Mo)S2nanosheets by simultaneous carbonization and N-doping in Ar/H2atmosphere.This optimized WS2/NWC and MoS2/N-MoC electrode exhibits remarkable lightassisted electrocatalysis activity with overpotentials of0.120 and 0.122 V at 10 mA·cm-1in acidic solutions,respectively.Such high hydrogen evolution activities should be attributed to the electrocatalytic synergistic effects of the abundant active sites existing in different phase boundaries and the absorption for ultraviolet-visible light.This study shows that synthesis of low-cost and highly active W(Mo)S2-based hydrogen evolution electrocatalyst opens up a route toward the development of scalable production of hydrogen fuels. 展开更多
关键词 W(Mo)S2/N-W(Mo)C heterostructures Vertically aligned nanosheets Hydrogen evolution Lightassisted electrocatalysis
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Aligned fibers enhance nerve guide conduits when bridging peripheral nerve defects focused on early repair stage 认领 引用 被引量：5
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作者 Qi Quan Hao-Ye Meng +7 位作者 Biao Chang Guang-Bo Liu Xiao-Qing Cheng He Tang Yu Wang Jiang Peng Qing Zhao Shi-Bi Lu 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第5期903-912,共10页
Nerve conduits enhance nerve regeneration in the repair of long-distance peripheral nerve defects. To help optimize the effectiveness of nerve conduits for nerve repair, we developed a multi-step electrospinning proce... Nerve conduits enhance nerve regeneration in the repair of long-distance peripheral nerve defects. To help optimize the effectiveness of nerve conduits for nerve repair, we developed a multi-step electrospinning process for constructing nerve guide conduits with aligned nanofibers. The alignment of the nerve guide conduits was characterized by scanning electron microscopy and fast Fourier transform. The mechanical performance of the nerve guide conduits was assessed by testing for tensile strength and compression resistance. The biological performance of the aligned fibers was examined using Schwann cells, PC12 cells and dorsal root ganglia in vitro. Immunohistochemistry was performed for the Schwann cell marker S100 and for the neurofilament protein NF200 in PC12 cells and dorsal root ganglia. In the in vivo experiment, a 1.5-cm defect model of the right sciatic nerve in adult female Sprague-Dawley rats was produced and bridged with an aligned nerve guide conduit. Hematoxylin-eosin staining and immunohistochemistry were used to observe the expression of ATF3 and cleaved caspase-3 in the regenerating matrix. The recovery of motor function was evaluated using the static sciatic nerve index. The number of myelinated fibers, axon diameter, fiber diameter, and myelin thickness in the distal nerve were observed by electron microscopy. Gastrocnemius muscle mass ratio was also determined. The analyses revealed that aligned nanofiber nerve guide conduits have good mechanical properties and can induce Schwann cells, PC12 cells and dorsal root ganglia to aggregate along the length of the nanofibers, and promote the growth of longer axons in the latter two(neuronal) cell types. The aligned fiber nerve conduits increased the expression of ATF3 and cleaved caspase-3 at the middle of the regenerative matrix and at the distal nerve segment, improved sciatic nerve function, increased muscle mass of the gastrocnemius muscle, and enhanced recovery of distal nerve ultrastructure. Collectively, the results show that highly aligned nanofibers improve the performance of the nerve conduit bridge, and enhance its effectiveness in repairing peripheral nerve defects. 展开更多
关键词 nerve regeneration nerve guide conduit electrospinning peripheral nerve injury aligned fiber sciatic nerve structure mechanical function nerve scaffold nanofiber neural regeneration
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High-performance proton exchange membrane fuel cell with ultra-low loading Pt on vertically aligned carbon nanotubes as integrated catalyst layer 认领 引用 被引量：6
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作者 Qing Hao Meng Chao Hao +4 位作者 Bowen Yan Bin Yang Jia Liu Pei Kang Shen Zhi Qun Tian 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第8期497-506,I0013,共10页
Reducing a Pt loading with improved power output and durability is essential to promote the large-scale application of proton exchange membrane fuel cells(PEMFCs).To achieve this goal,constructing optimized structure ... Reducing a Pt loading with improved power output and durability is essential to promote the large-scale application of proton exchange membrane fuel cells(PEMFCs).To achieve this goal,constructing optimized structure of catalyst layers with efficient mass transportation channels plays a vital role.Herein,PEMFCs with order-structured cathodic electrodes were fabricated by depositing Pt nanoparticles by Ebeam onto vertically aligned carbon nanotubes(VACNTs)growth on Al foil via plasma-enhanced chemical vapor deposition.Results demonstrate that the proportion of hydrophilic Pt-deposited region along VACNTs and residual hydrophobic region of VANCTs without Pt strongly influences the cell performance,in particular at high current densities.When Pt nanoparticles deposit on the top depth of around 600 nm on VACNTs with a length of 4.6μm,the cell shows the highest performance,compared with others with various lengths of VACNTs.It delivers a maximum power output of 1.61 W cm-2(H2/O2,150 k Pa)and 0.79 W cm-2(H2/Air,150 k Pa)at Pt loading of 50μg cm-2,exceeding most of previously reported PEMFCs with Pt loading of<100μg cm-2.Even though the Pt loading is down to 30μg cm-2(1.36 W cm-2),the performance is also better than 100μg cm-2(1.24 W cm-2)of commercial Pt/C,and presents better stability.This excellent performance is critical attributed to the ordered hydrophobic region providing sufficient mass passages to facilitate the fast water drainage at high current densities.This work gives a new understanding for oxygen reduction reaction occurred in VACNTs-based ordered electrodes,demonstrating the most possibility to achieve a substantial reduction in Pt loading<100μg cm-2 without sacrificing in performance. 展开更多
关键词 Proton exchange membrane fuel cells Order-structured catalyst layer Vertically aligned carbon nanotubes Ultra-low Pt loading Membrane electrode assembly
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Electrical and Piezoresistive Properties of Steel Fiber Cement-based Composites Aligned by a Magnetic Field 认领 引用 被引量：5
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作者 LIU Liyuan XU Jinxia +2 位作者 WANG Yang YIN Tianjiao CHU Hongqiang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2022年第2期229-240,共12页
Directionally distributed steel fiber cement-based composites(SFCCs)were prepared by magnetic field(MF)induction technology.The orientation factor of steel fibers in the as-obtained SFCCs was determined.Besides,the el... Directionally distributed steel fiber cement-based composites(SFCCs)were prepared by magnetic field(MF)induction technology.The orientation factor of steel fibers in the as-obtained SFCCs was determined.Besides,the electrical resistivity and piezoresistive responses in two directions of aligned steel fiber cement-based composites,i e,parallel and perpendicular to MF,were measured.The effects of several variables,eg,steel fiber content,curing age,humidity,and temperature,on anisotropic electrical property were studied.The cyclic and failure piezoresistive responses in different directions were tested.It is found that the aligned steel fibers in the as-obtained SFCCs have a high orientation factor more than 0.88.Besides,SFCCs with aligned steel fibers exhibit an obvious anisotropic conductivity and piezoelectric sensitivity.The electrical conductivity of SFCCs with aligned steel fibers is less affected by temperature and humidity.At the steel fiber content of 2.5wt%,the piezoelectric sensitivity coefficient of SFCCs in the direction parallel to MF has the highest value of 324.14.In addition,the piezoresistive properties of SFCCs with aligned steel fibers in the direction parallel to MF indicate excellent sensitivity and stability under cyclic loading and monotonic loading. 展开更多
关键词 electrical resistivity aligned steel fiber piezoresistivity cement-based composites
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Growth of aligned SnS nanowire arrays for near infrared photodetectors 认领 引用 被引量：4
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作者 Guozhen Shen Haoran Chen Zheng Lou 《Journal of Semiconductors》 EI CAS CSCD 2020年第4期95-100,共6页
Aligned SnS nanowires arrays were grown via a simple chemical vapor deposition method.As-synthesized SnS nanowires are single crystals grown along the[111]direction.The single SnS nanowire based device showed excellen... Aligned SnS nanowires arrays were grown via a simple chemical vapor deposition method.As-synthesized SnS nanowires are single crystals grown along the[111]direction.The single SnS nanowire based device showed excellent response to near infrared lights with good responsivity of 267.9 A/W,high external quantum efficiency of 3.12×10^4%and fast response time.Photodetectors were built on the aligned SnS nanowire arrays,exhibiting a light on/off ratio of 3.6,and the response and decay time of 4.5 and 0.7 s,respectively,to 1064 nm light illumination. 展开更多
关键词 photodetectors nanowires infrared aligned
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A comparison of the field emission characteristics of vertically aligned graphene sheets grown on different SiC substrates 认领 引用 被引量：3
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作者 陈莲莲 郭丽伟 +3 位作者 刘宇 李治林 黄郊 芦伟 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第10期567-570,共4页
The field emission （FE） properties of vertically aligned graphene sheets （VAGSs） grown on different SiC substrates are reported. The VAGSs grown on nonpolar SiC （10-10） substrate show an ordered alignment with t... The field emission （FE） properties of vertically aligned graphene sheets （VAGSs） grown on different SiC substrates are reported. The VAGSs grown on nonpolar SiC （10-10） substrate show an ordered alignment with the graphene basal plane-parallel to each other, and show better FE features, with a lower turn-on field and a larger field enhancement factor. The VAGSs grown on polar SiC （000-1 ） substrate reveal a random petaloid-shaped arrangement and stable current emission over 8 hours with a maximum emission current fluctuation of only 4%. The reasons behind the differing FE characteristics of the VAGSs on different SiC substrates are analyzed and discussed. 展开更多
关键词 field emission vertically aligned graphene sheets SiC substrate
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A biomimetic basementmembrane consisted of hybrid aligned nanofibers andmicrofibers with immobilized collagen IV and laminin for rapid endothelialization 认领 引用 被引量：2
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作者 Chenglong Yu Guoping Guan +3 位作者 Stefanie Glas Lu Wang Zhutong Li Lih-Sheng Turng 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2021年第2期171-189,共19页
Rapid formation of a continuous endothelial cell(EC)monolayer with healthy endothelium function on the luminal surface of vascular implants is imperative to improve the longtime patency of small-diameter vascular impl... Rapid formation of a continuous endothelial cell(EC)monolayer with healthy endothelium function on the luminal surface of vascular implants is imperative to improve the longtime patency of small-diameter vascular implants.In the present study,we combined the contact guidance effects of aligned nanofibers,which enhance EC adhesion and proliferation because of its similar fiber scale with native vascular basement membranes,and aligned microfibers,which could induce EC elongation effectively and allow ECs infiltration.It was followed by successive immobilization of collagen IV and laminin to fabricate a biomimetic basement membrane(BBM)with structural and compositional biomimicry.The hemolysis assay and platelet adhesion results showed that the BBM exhibited excellent hemocompatibility.Meanwhile,the adhered human umbilical vein endothelial cells(HUVECs)onto theBBMaligned along the orientation of the microfibers with an elongated morphology,and the data demonstrated that the BBM showed favorable effects on EC attachment,proliferation,and viability.The oriented EC monolayer formed on the BBM exhibited improved antithrombotic capability as indicated by higher production of nitric oxide and prostacyclin(PGI2).Furthermore,fluorescence images indicated that HUVECs could infiltrate into the BBM,implying theBBM’s ability to enhance transmural endothelialization.Hence,theBBMpossessed the properties to regulate ECbehaviors and allow transmural ingrowth,demonstrating the potential to be applied as the luminal surface of small-diameter vascular implants for rapid endothelialization. 展开更多
关键词 Biomimetic basement membranes Aligned electrospun fibers Surface modification Endothelialization Anti-thrombogenicity Transmural ingrowth
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