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Realization of Polytype Heterostructures via Delicate Structural Transitions from a Doped Mott Insulator 认领 引用
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作者 Yanyan Geng Manyu Wang +9 位作者 Shumin Meng Shuo Mi Chang Li Huiji Hu Jianfeng Guo Rui Xu Fei Pang Wei Ji Weichang Zhou Zhihai Cheng 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期118-135,共18页
Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling pha... Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling phase transitions to form diverse heterostructures inside a single crystal remains challenging.In this study,we realize vertical/lateral polytype heterostructures in a hole-doped Mott insulator via thermal annealing-induced structural transitions.Raman spectroscopy,atomic force microscopy and scanning Kelvin probe force microscopy confirm the coexistence of T-H polytype heterostructures.Atomic-scale scanning tunneling microscopy/spectroscopy measurements reveal the transparent effect in 1H/1T vertical heterostructures,where positive bias voltage induces in a pronounced superposition of the√13×√13 CDW of the 1T-layer on the 1H-layer.By systematically comparing the 1T/1H and 1T/1T interfaces,we demonstrate that the metallic 1H-layer induces a Coulomb screening effect on the 1T-layer,suppressing the formation of CDW domain walls and forming more ordered electronic states.These results clarify the interfacial coupling between distinct quantum many-body phases and establish a controllable pathway for constructing two-dimensional polytype heterostructures with tunable electronic properties. 展开更多
关键词 Raman spectroscopy polytype heterostructures structural electronic phases spectroscopyatomic force microscopy thermal annealing structural transitions emergent quantum propertieshowevercontrolling phase transitions constructing polytype heterostructures
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Charge-mediated cyclohexanone enrichment and intermediate stabilization at MoNi4/MoO2 heterostructures enable paired cyclohexanone electrooxidation-hydrogen production at ampere-level current 认领 引用
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作者 Rui Yang Zimin Han +5 位作者 Yin Gao Guoqing Feng Huaizhi Liu Yiyin Huang Zhongkai Wang Yaobing Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期344-354,共11页
Electrocatalytic oxidation of cyclohexanone(KOR)to adipic acid provides a sustainable and value-added pathway for coupled hydrogen evolution(HER).However,the weak adsorption of the reactants and intermediates leads to... Electrocatalytic oxidation of cyclohexanone(KOR)to adipic acid provides a sustainable and value-added pathway for coupled hydrogen evolution(HER).However,the weak adsorption of the reactants and intermediates leads to poor reaction kinetics and product yield.Herein,we synthesized MoNi4/MoO2 heterostructures via phase conversion to engineer a large work function difference that optimizes the Ni electronic structure.This design enhances cyclohexanone adsorption and regulates intermediates,achieving 85%Faradaic efficiency for production of adipic acid and a 2 mmol h-1 cm-2 production rate,along with an ampere-level current.In a membrane electrode assembly electrolyzer for KOR-assisted HER,this catalyst displays 1 A current with 12.1 mol adipic acid production and 3.34 L H2 generation over 8 h,maintaining stability for 56 h at 3 A.Optimized Ni electronic structure achieved through heterojunction-induced charge redistribution strengthens cyclohexanone adsorption and lowers the energy barriers for key intermediates(C6H10O2*and C6H10O3*),boosting oxidation activity.This study presents a novel heterojunction engineering strategy that synergistically enhances reactant adsorption and optimizes intermediate reaction kinetics,offering a tailored approach for efficient catalytic systems. 展开更多
关键词 MoNi4/MoO2heterostructures Cyclohexanone electrooxidation Charge redistribution Strengthen adsorption Intermediate stabilization
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Phase engineering triggered oxygen vacancies synergy in amorphouscrystalline heterostructures enables superior oxygen evolution catalysis 认领 引用
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作者 Guichan Chen Zhantao Wu Dengjie Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期904-916,I0021,共13页
Crystalline perovskite oxides provide stability;however,their oxygen evolution reaction(OER)activity may be limited by restricted surface accessibility and active sites.Amorphous surfaces enable high activity but ofte... Crystalline perovskite oxides provide stability;however,their oxygen evolution reaction(OER)activity may be limited by restricted surface accessibility and active sites.Amorphous surfaces enable high activity but often lack long-term operational stability.Herein,we engineered the phase structure of the classic Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF)to boost OER activity and optimize operational stability.The ternary-phase BSCF demonstrates a low overpotential of 440 mV at 50 mA cm-2and exceptional stability,with negligible degradation over 100 h.Within the ternary-phase structure,the hexagonal-phase BSCF readily transforms into an amorphous,catalytically active layer of(oxy)hydroxides,as demonstrated by operando Raman spectroscopy and theoretical calculations that indicate a lower formation energy.Meanwhile,the cubic-phase BSCF provides remarkable structural robustness,suppressing surface reconstruction and maintaining high stability.Importantly,the synergy between the reconstructed surface and the cubic-phase bulk markedly increases surface and bulk oxygen vacancies,thereby yielding a rapid oxygen-ion diffusion coefficient(3.04 x 10-12cm2s-1)and accelerating OER kinetics via the lattice-oxygen mechanism.Additionally,zinc-air batteries utilizing the amorphous-crystalline heterostructures with abundant oxygen vacancies exhibit a low voltage gap of 0.81 V between charging and discharging and sustain cycling stability for over 300 h at 10 mA cm-2.This phase engineering strategy simultaneously maximizes both bulk stability and surface reactivity,and the principles underlying this approach may be extended to other promising perovskite electrocatalysts. 展开更多
关键词 Perovskite oxide Phase engineering Amorphous-crystalline heterostructures Oxygen vacancies Oxygen evolution
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Magnetic-Dielectric Synergy in One-Dimensional Metal Heterostructures for Enhanced Low-Frequency Microwave Absorption 认领 引用 被引量：3
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作者 Feiyue Hu Peigen Zhang +10 位作者 Pei Ding Shuo Zhang Bingbing Fan Ali Saffar Shamshirgar Wei Zheng Wenwen Sun Longzhu Cai Haijiao Xie Qiyue Shao Johanna Rosen ZhengMing Sun 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第5期371-390,共20页
Microwave absorption(MA)materials often face poor synergy between impedance matching and attenuation in the low-frequency range.Balancing permittivity and permeability through magnetic-dielectric synergy is a promisin... Microwave absorption(MA)materials often face poor synergy between impedance matching and attenuation in the low-frequency range.Balancing permittivity and permeability through magnetic-dielectric synergy is a promising strategy to address this issue.To realize the synergy,herein,Sn whiskers with an in situ oxide layer served as substrates for magnetic-loss-active CoNi nanosheet growth,forming a hierarchical CoNi@SnO2@Sn(CNS)heterostructure.The CNS absorber achieves a minimum reflection loss(RLmin)value of-62.29 dB with an effective absorption bandwidth(EAB)of 2.2 GHz,covering the entire C-band with 70%absorption at only 2.61 mm thickness.The nanosheet design of CoNi enhances magnetic anisotropy to promote natural resonance,while the conductive Sn core and abundant Sn/SnO2 and CoNi/SnO2 heterointerfaces facilitate conduction loss and dielectric polarization.When composited into a thermoplastic polyurethane(TPU)matrix,the resulting CNS/TPU-2 film(20 wt%CNS)exhibits an RLmin value of-61.04 dB and a 2.5 GHz EAB.Its in-plane and through-plane thermal conductivities reach 2.41 and 0.51 W m-1 K-1,representing 4.1 and 2.6 times those of pure TPU films,respectively,facilitating heat dissipation from protected devices.This work provides valuable insights into magnetic-dielectric synergy for low-frequency MA of 1D metal-based materials,offering promising potential for 5G communications and flexible electronics. 展开更多
关键词 Low frequency microwave absorption Magnetic-dielectric synergy MAX phase CoNi@SnO2@Sn heterostructure Thermal conductivity
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Strengthening mechanisms and high-temperature oxidation behavior of extruded hollow WE43 magnesium profile with lamellar heterostructures 认领 引用
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作者 Xuhao Hu Chaojie Che +2 位作者 Xinlin Li Liren Cheng Hongjie Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期322-336,共15页
A major challenge for the application of Mg alloy hollow profiles in railway vehicles is to simultaneously improve their mechanical properties and flame retardancy.This work fabricated a large-size asymmetric hollow p... A major challenge for the application of Mg alloy hollow profiles in railway vehicles is to simultaneously improve their mechanical properties and flame retardancy.This work fabricated a large-size asymmetric hollow profile of Mg-4.04Y-2.38Nd-1.02Gd-0.41Zr(WE43)alloy by porthole die extrusion.The influences of process parameters on the temperature and stress fields were investigated by finite element method(FEM).The microstructures were analyzed using a combination of optical microscope,scanning electron microscopy,transmission electron microscopy,spherical aberration transmission electron microscopy and X-ray electro n diffractio n.The mechanical properties of the alloy were evaluated using hardness and tensile testing methods.X-ray photoelectron spectroscopy was employed to conduct compositional analysis of the film following high-temperature oxidatio n.Lamellar heterostructures were formed in the extruded profile by high-temperature extrusion,with rapid cooling and a high extrusion ratio,followed by artificial aging.The average values of yield strength(YS),ultimate tensile strength(UTS)and elongation(EL)of the extruded profiles after T5 treatment were 291 MPa,385 MPa,and 16.4%,respectively.The profiles demonstrate a good balance between strength and plasticity,attributed to the synergistic effect of weak basal texture,precipitation strengthening and heterogeneous deformation induced strengthening.Finally,the extruded hollow profile does not catch fire during high-temperature oxidation up to 1050℃ due to the protection of the dense Y2O3 and MgO composite layer on the matrix.This work is of great significance in guiding the application and industrial production of large-sized hollow profiles of WE43 alloy in railway vehicles. 展开更多
关键词 Mg alloy Rare earths Extrusion Heterostructures Flame resistance Industrial production
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Gate-Tunable Strong Spin–Orbit Torque in 2D Weyl Semiconductor Tellurium-Based Heterostructures 认领 引用
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作者 Qiqi Zhang Xiaoyu Xiong +11 位作者 Hongjun Xu Congli He Chaoqun Hu Hao Yu Chunli Zhao Jiayi Chen Haochang Lyu Ruifen Dou Shipeng Shen Guoqiang Yu Jinxing Zhang Shouguo Wang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第4期292-302,共11页
Two-dimensional(2D)Te possesses a unique chiral crystal structure and strong spin-orbit coupling,making it a promising material platform for the study of spin-orbit torque(SOT).In this work,we systematically investiga... Two-dimensional(2D)Te possesses a unique chiral crystal structure and strong spin-orbit coupling,making it a promising material platform for the study of spin-orbit torque(SOT).In this work,we systematically investigate the gate-tunable electrical transport and SOT efficiency in high-quality 2D Te synthesized via a hydrothermal method. 展开更多
关键词 d te electrical transport gate tunable D Weyl semiconductor chiral crystal structure tellurium based heterostructures hydrothermal method strong spin orbit torque
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Band Engineering and Structural-Geometrical Engineering in 2D/3D van der Waals Heterostructures for Advanced Photodetection and Intelligent Sensing 认领 引用
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作者 Miaomiao Yang Kaiwen Gong +3 位作者 Yanxia Cui Shaoding Liu Guohui Li Shenghuang Lin 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期25-76,共52页
With the rapid advancement of the information era,the demand for device integration and intelligent sensing has grown significantly.Traditional three-dimensional(3D)materials are constrained by lattice mismatch and in... With the rapid advancement of the information era,the demand for device integration and intelligent sensing has grown significantly.Traditional three-dimensional(3D)materials are constrained by lattice mismatch and interfacial defects,and their limited functionalities often require bulky auxiliary components.In contrast,the rich family of two-dimensional(2D)materials eliminates lattice-matching constraints and offers unique light-matter interactions,paving the way for compact and novel intelligent sensing technologies.However,large-area fabrication and precise layer alignment in all-2D systems remain major challenges that hinder device scalability.Given that the performance and manufacturing capabilities of 2D materials cannot replace traditional semiconductors(such as Si),they are more likely to be heterogeneously integrated with conventional 3D semiconductors.2D/3D heterojunctions combine the distinctive optoelectronic properties of 2D materials with the mature electronic functionalities of 3D semiconductors.In this work,we present recent advances in 2D/3D heterojunction photodetectors,with a particular emphasis on the underlying physical mechanisms,including band structure design,interface optimization,external-field coupling,and novel topological configurations.Meanwhile,we also explore emerging opportunities for CMOS-compatible and intelligent sensing optoelectronic systems.Finally,the challenges and future research directions toward the integrated development of 2D/3D heterojunctions are discussed. 展开更多
关键词 2D/3D heterostructures Mixed-dimensional integration Photodetectors Optoelectronic applications
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Giant Enhancement of Perpendicular Magnetic Anisotropy and Field-Free Switching Through Interfacial Engineering in Pt/Co/Pt Heterostructures 认领 引用
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作者 Yulin Zhang Mingzhang Wei +8 位作者 Ziji Shao Haodong Fan Menghao Jin Zhongshu Feng Xiaofeng Han Changqiu Yu Jiahong Wen Xinyu Shu Tiejun Zhou 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期48-61,共14页
The enhancement of perpendicular magnetic anisotropy(PMA)is critical for the continuous growth of magnetic memory density.Material systems that possess high interfacial PMA typically involve strong spin-orbit coupling... The enhancement of perpendicular magnetic anisotropy(PMA)is critical for the continuous growth of magnetic memory density.Material systems that possess high interfacial PMA typically involve strong spin-orbit coupling(SOC)or transition metal/oxide interfaces.In contrast,the role of 3d light metals in enhancing the interfacial PMA has been less investigated.This study demonstrated that the insertion of a few atomic Cr layers into Pt/Co/Pt/Ta heterostructures with Cr between the 1 atomic Pt layer and the 3 nm Ta overlayer enhanced the effective PMA energy(Keff)by a factor of 4.First-principles calculations revealed that the underlying mechanism originated from Cr-Pt d-orbital hybridization,leading to a corresponding orbital redistribution and significantly increasing the magnetic anisotropy energy.The progressive reduction in the spin-orbit torque(SOT)efficiency with increasing Cr thickness might stem from the enhanced orbital Rashba–Edelstein effect at the Pt/Cr interface.Furthermore,the wedging of a few atomic Cr layers caused the robust field-free SOT switching of perpendicular magnetization,which was due to the lateral PMA gradients enabled by the strong dependence of the PMA on the Cr thickness.The results provide a method for interfacial PMA enhancement by d-orbital hybridization of 3d–5d electrons and an alternative to field-free SOT switching towards low-power and high-density memory applications. 展开更多
关键词 d light metals interfacial engineering enhancement perpendicular magnetic anisotropy pma perpendicular magnetic anisotropy spin orbit coupling Pt Co Pt heterostructures field free switching nm t
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From stacking to function:Emergent states and quantum devices in 2D superconductor heterostructures 认领 引用
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作者 Sichun Zhao Junlin Xiong +3 位作者 Ji Zhou Shi-Jun Liang Bin Cheng Feng Miao 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第6期87-110,共24页
Two-dimensional(2D)superconductors provide a powerful building block for engineering emergent quantum states shaped by reduced dimensionality,enhanced quantum fluctuations,and interfacial symmetry breaking.In van der ... Two-dimensional(2D)superconductors provide a powerful building block for engineering emergent quantum states shaped by reduced dimensionality,enhanced quantum fluctuations,and interfacial symmetry breaking.In van der Waals(vdW)heterostructures,atomically sharp and lattice-mismatch-free interfaces enable superconductivity to be deliberately coupled with magnetism,spin–orbit interaction,and band topology,allowing collective electronic orders to be combined and reconfigured in ways unattainable in bulk materials.This review summarizes recent advances in vdW heterostructures of 2D superconductors,focusing on superconductor/magnet(S/M),superconductoropological material(S/T),and superconductor/superconductor(S/S)junctions.We discuss the microscopic mechanisms underlying proximity effects and highlight how interfacial exchange fields,spin–orbit coupling,and twist-controlled tunneling give rise to unconventional pairing,long-range spin-triplet supercurrents,nonreciprocal Josephson transport,and topological superconductivity potentially hosting Majorana bound states.Beyond their fundamental significance,the ability to controllably generate topological and nonreciprocal superconducting states positions 2D superconductor heterostructures as promising building blocks for emerging quantum technologies,including ultra-sensitive quantum sensing,programmable superconducting logic,and energy-efficient quantum and neuromorphic computing architectures.Looking forward,advances in materials synthesis,interface engineering,and device integration are expected to further expand the scope and functionality of 2D superconductor heterostructures,reinforcing their role as a central platform for exploring and controlling emergent quantum phases. 展开更多
关键词 two-dimensional superconductor van der Waals heterostructures quantum device
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The rise of van der Waals multiferroic heterostructures:Interfacial physics and devices 认领 引用
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作者 Yihao Zhao Hongxu Duan +1 位作者 Tai Min Tao Li 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第6期37-57,共21页
Van der Waals(vdW)multiferroic heterostructures,formed by stacking two-dimensional(2D)ferroelectric and magnetic materials,have emerged as a highly promising platform for next-generation electronic devices.The atomica... Van der Waals(vdW)multiferroic heterostructures,formed by stacking two-dimensional(2D)ferroelectric and magnetic materials,have emerged as a highly promising platform for next-generation electronic devices.The atomically sharp,dangling-bond-free interfaces of these heterostructures,combined with unprecedented design freedom unrestricted by lattice-matching constraints,provide an ideal playground for exploring novel magnetoelectric phenomena.This review systematically surveys the fundamental progress,challenges,and future applications in this rapidly advancing field.We begin by examining the three key interfacial magnetoelectric coupling mechanisms that have been theoretically proposed:polarization-gated interfacial charge transfer,interfacial orbital hybridization,and polarization-modulated interfacial Dzyaloshinskii–Moriya interaction(DMI).Subsequently,we bridge theory and practice by reviewing pivotal experimental demonstrations,from initial proof-of-concept work in hybrid-dimensional systems and intrinsic-mechanism explorations in low-temperature all-vdW systems to the landmark breakthrough of non-volatile electrical control of magnetism at room temperature.Building on this physical foundation,we highlight the immense potential of this field for future device applications,focusing on three promising paradigms,including ultra-low-power memory and logic,brain-inspired neuromorphic computing,and topological spintronics based on the electrical manipulation of skyrmions.Finally,we conclude by summarizing current research bottlenecks and outlining key future directions to transition this promising field from fundamental research to tangible technology. 展开更多
关键词 multiferroics Van der Waals heterostructures magnetoelectric coupling two-dimensional materials spintronics
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Exploration of Interfacial Conductivity and Magnetism in Manganite/Cuprate Heterostructures 认领 引用
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作者 Bo Du Gangfan Chen +8 位作者 Yichi Zhang Guangyu Xi Jingyi Shen Yiwei Gu Yuan Liu Tianshuang Ren Chuanyu Shi Yanwu Xie Jie Wu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第2期210-216,共7页
Superconductivity emerging at the interface of heterostructures provides a unique platform to study and control superconductivity at the two-dimensional limit and offers a promising avenue for discovering new supercon... Superconductivity emerging at the interface of heterostructures provides a unique platform to study and control superconductivity at the two-dimensional limit and offers a promising avenue for discovering new superconducting materials.By adjoining an undoped cuprate layer,such as La2CuO4(LCO) and SrCuO2(SCO),with a hole-doped La1-xSrxMnO3(LSMO)layer,we systematically investigate the conductivity and magnetism of manganite/cuprate heterostructures while varying the LSMO doping level from 0.33 to 0.80 to tune LSMO from a ferromagnetic metal to an antiferromagnetic insulator.Driven by the difference in work functions,charges are transferred from the LSMO layer to the cuprate layer,thereby giving rise to a conducting interfacial layer when the LSMO layer is heavily doped.No signature of interface superconductivity is observed in any of the synthesized heterostructures,a behavior likely attributable to spin-polarized charge transfer and the competition between superconductivity and magnetism.Our findings provide valuable insights into the mechanism of interface superconductivity as well as guidelines for the search for emergent interfacial effects. 展开更多
关键词 doping level spin polarized charge transfer study control superconductivity interfacial conductivity magnetism superconducting materialsby manganite cuprate heterostructures undoped cuprate layersuch
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Ce-induced electronic structure reconfiguration in Ni-based heterostructures for accelerated alkaline hydrogen evolution 认领 引用
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作者 Xuejiao Sun Hongxi Li +4 位作者 Ji Hua Xiang Ji Dongmei Li Zhongzhen Tian Ying Liu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2073-2080,I0003,共8页
This study aimed to develop efficient and stable non-precious metal electrocatalysts for the hydrogen evolution reaction(HER),addressing the limitations of current catalysts such as insufficient activity and high cost... This study aimed to develop efficient and stable non-precious metal electrocatalysts for the hydrogen evolution reaction(HER),addressing the limitations of current catalysts such as insufficient activity and high cost.A self-supported CeS/NiS/Ni3N/SSM electrocatalyst with abundant heterointerfaces was successfully constructed on a stainless steel mesh(SSM)via an electrodeposition combined with hightemperature solid-gas phase sulfidationitridation strategy.X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)analyses confirm the successful introduction of CeS and the strong electronic interaction among the three phases of CeS,NiS,and Ni3N.The doping of Ce induces a redistribution of interface charges,forming electron-deficient Ni centers and optimizing the hydrogen adsorption energy.Scanning electron microscopy(SEM)and transmission electron microscopy(TEM)characterizations reveal that the introduction of CeS transforms the smooth agglomerated particles of NiS/Ni3N into a hierarchical porous structure composed of nanoclusters,significantly increasing the electrochemically active area and constructing clear heterointerfaces,which facilitates the exposure of active sites and mass transfer processes.Density functional theory calculations further indicate that the CeS/NiS/Ni3N heterostructure exhibits a hydrogen adsorption Gibbs free energy(ΔGH*)close to zero(-0.16 eV),significantly superior to that of single components,thereby optimizing the reaction kinetics.The results demonstrate that CeS/NiS/Ni3N/SSM delivers outstanding HER performance in 1 mol/L KOH,requiring an overpotential of only 73.6 mV to achieve the 10 mA/cm2 current density,with a Tafel slope of 87.6 mV/dec,and maintains excellent stability for at least 48 h.This work illustrates that constructing heterointerfaces with simultaneous electronic modulation and structural optimization provides an effective pathway for designing high-performance non-precious metal electrocatalysts. 展开更多
关键词 Electrocatalyst Hydrogen evolution reaction Heterostructure Rare earths
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Electron-modulated ZrP@GO heterostructures enabling synergistic proton-electron transfer for energy-efficient amine regeneration in CO2capture 认领 引用
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作者 Jia Xiong Qiang Sun +5 位作者 Liwen Ke Shaofei Wang Zirui Wang Hongxia Gao Zhiwu Liang Yu Mao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期326-336,I0009,共11页
Catalytic regeneration stands as a pivotal technology to address the high-energy-consumption bottleneck inherent in the regeneration step of amine-based CO2capture systems.However,existing solid acid catalysts suff... Catalytic regeneration stands as a pivotal technology to address the high-energy-consumption bottleneck inherent in the regeneration step of amine-based CO2capture systems.However,existing solid acid catalysts suffer from insufficient density of acidic sites and poor proton-electron transfer synergy,which severely limits their practical applications.To address this challenge,this study designed and fabricated a two-dimensional zirconium phosphate@graphene oxide(ZrP@GO)heterostructured catalyst with a built-in interfacial electric field,and proposed for the first time a"dual-acid synergy mediated by electron transfer"catalytic mechanism:a built-in electric field is constructed through the interfacial electron coupling between ZrP and GO,which precisely regulates the activity of Brønsted acid/Lewis acid sites and achieves dynamic matching between the function of acid sites and the proton-coupled electron transfer(PCET)process.Compared with the non-catalytic system,the optimal ZrP@GO-10 composite increases the instantaneous CO2desorption rate by 1090%,reduces the regeneration heat duty by 60%,and maintains excellent catalytic stability after 10 desorption cycles.Density functional theory(DFT)calculations reveal that the interfacial electron coupling effect of ZrP@GO constructs a"bond activation-proton transfer"dual-path synergy mechanism by directionally regulating the charge density distribution and enhancing the PCET reaction kinetics.This mechanism can simultaneously reduce the cleavage energy barrier of the carbamate C-N bond and the deprotonation energy barrier of protonated amines(MEAH+),clarifying the essence of the catalyst for achieving low-temperature and low-energy consumption regeneration from a theoretical perspective.This study provides a novel and efficient catalytic paradigm for amine solution regeneration,and promotes the practical application of amine-based CO2capture technology. 展开更多
关键词 CO2capture Catalytic desorption Heterostructure Zirconium hydrogenphosphate Energy consumption
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Evolution of multiscale heterostructures and comprehensive properties improvement in the large thickness ratio Ti/Al/Mg clad plates under heterothermal rolling 认领 引用
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作者 Junxin Wei Jianchao Han +2 位作者 Yi Jia Tao Wang Qingxue Huang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第5期503-526,共24页
The preparation process of metal clad plates with large thickness ratios(>20)requires ensuring the substrate thickness while also achieving good mechanical properties,a challenge that traditional rolling processes ... The preparation process of metal clad plates with large thickness ratios(>20)requires ensuring the substrate thickness while also achieving good mechanical properties,a challenge that traditional rolling processes struggle to meet.In this study,TA1/1060/AZ31 clad plates with large thickness ratios(>40)and engineered heterostructures were fabricated via heterothermal rolling,achieving synergistic enhancements in bonding strength and tensile properties.This is attributed to localized interfacial strain concentration induced by the temperature gradient,and sustained strain hardening within the multiscale heterostructured magnesium matrix.The study reveals that the temperature gradient variation in the normal direction of the matrix causes considerable gradation in its deformation mechanisms and microstructure,resulting in diverse heterostructures.In the hot roller zone,high temperatures and large strains promoted the formation of low-angle grain boundaries(LAGBs)with distinct distribution patterns.In contrast,deformation in the cold roller zone was stress-dominated,where the competition between tensile twins andslip changed at low temperatures.Furthermore,LAGB evolution andslip activity differences caused zone-specific variations in discontinuous dynamic recrystallization(CDRX),affecting dislocation density and grain refinement.The higher CDRX degree in the cold roller zone(soft domain)delayed failure in the hot roller zone(hard domain),while heterogeneities in grain size and texture enhanced strain hardening.The dense presence ofdislocations within grains further confirmed the continuous strain hardening behavior.This study provides new insights for the fabrication of metal clad plates with large thickness ratios and the development of novel heterostructures. 展开更多
关键词 Bonding and tensile properties Strain hardening Heterostructure Deformation mechanism
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Strength-Ductility Balance in Additively Manufactured Laminated Fe-Cr-Ni/Fe-Cr-Ni-Cu Alloy Heterostructures 认领 引用
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作者 Jiuxing Tang Zhenguang Gao +7 位作者 Hong Ma Yinhui Wang Hui Deng Qi Yan Xu-Sheng Yang Suet To Jinliang Du Wai Sze Yip 《Rare Metals》 SCIE EI CAS CSCD 2026年第7期264-285,共22页
Fe-Cr-Ni-Cu alloy has been extensively utilized over the past few decades due to its low cost yet high strength.Nevertheless,the poor ductility of this alloy limits its real application in industrial fields.In this st... Fe-Cr-Ni-Cu alloy has been extensively utilized over the past few decades due to its low cost yet high strength.Nevertheless,the poor ductility of this alloy limits its real application in industrial fields.In this study,a soft Fe-Cr-Ni alloy was combined with a Fe-Cr-Ni-Cu alloy by laser-directed energy deposition(LDED)to fabricate the laminated Fe-Cr-Ni/Fe-Cr-Ni-Cu heterostructure,which achieved a high strain hardening capacity and superior strength-ductility balance.Results illustrate that the homogeneous Fe-Cr-Ni-Cu alloy exhibits the largest ultimate tensile strength(UTS)of 990.5±20.41 MPa and contrarily,the lowest fracture elongation(FE)of 11.65%±1.97%.In comparison,the heterostructure which underwent LDED with UTS of 913.01±6.99 MPa and FE of 36.4%±1.59%demonstrates a more than threefold increase in ductility with a slight sacrifice in strength compared to the homogeneous Fe-Cr-Ni-Cu alloy.The exceptional mechanical property of the heterostructure can be attributed to the hetero-deformation-induced(HDI)strengthening and strain hardening,precipitation strengthening,and transformation-induced plasticity(TRIP)effect.HDI strengthening,strain hardening,and TRIP effect collectively contribute to the enhancement of both strength and ductility,while precipitation strengthening also improves the strength.This work proposes a new strategy for the preparation of high-strength alloys with excellent ductility throughout the design of the laminated heterostructure with alternating soft and hard phases via an LDED technology,providing insights for the development of advanced materials with superior mechanical properties. 展开更多
关键词 laminated Fe-Cr-Ni/Fe-Cr-Ni-Cu heterostructure laser-directed energy deposition strain hardening strength-ductility balance strengthening mechanism
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Tailoring hyperbolic phonon polaritons in van der Waals heterostructures comprising multiphase boron nitride 认领 引用
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作者 WANG Kaiyuan LV Xin +3 位作者 MA Guolong WEN Lu LI Zhiqiang WANG Lei 《物理学进展》 北大核心 2026年第4期165-173,共9页
Phonon polaritons are hybrid quasiparticles arising from the coupling between infrared photons and lattice vibrations,enabling strong subwavelength confinement of electromagnetic fields.This unique property makes them... Phonon polaritons are hybrid quasiparticles arising from the coupling between infrared photons and lattice vibrations,enabling strong subwavelength confinement of electromagnetic fields.This unique property makes them highly promising for nanoscale manipulation of infrared light and enhanced light–matter interactions.In this work,we theoretically investigate hyperbolic phonon polariton in various boron nitride(BN)systems.Van der Waals heterostructures are constructed by combining different BN materials,including h10BN,h11BN,pyrolytic boron nitride,and wurtzite boron nitride,and further integrated withα-MoO3.We systematically analyze the effects of material composition,stacking sequence,and layer thickness on polariton dispersion,interlayer coupling,and interfacial hybridization.The influence of isotopic mass variation,crystal disorder–induced damping,and phase-dependent dielectric responses is first examined through intrinsic dispersion comparisons.Our results reveal that multilayer BN heterostructures enable tunable mode hybridization,leading to dispersion reconstruction,including branch rearrangement and spectral redistribution.When coupled with α-MoO3,the system exhibits multiple dispersion bandgaps and low group-velocity branches under specific conditions,arising from strong multimode coupling.These findings demonstrate that material selection,stacking configuration,and thickness engineering provide versatile degrees of freedom for tailoring hyperbolic phonon polaritons,offering valuable theoretical guidance for infrared polariton engineering in complex van der Waals heterostructures. 展开更多
关键词 phonon polaritons isotopic boron nitride van der Waals heterostructures negative refraction mode hybridization slow light
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Enhancing Heat Transfer in X-ray Tube by van der Waals Heterostructures-based Thermionic Emission 认领 引用
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作者 LI Qian-qian HUANG Sun-chao +8 位作者 CHEN Su-guo WANG Yue SHI Xi-hang ZHANG Xiao-qiu-yan HU Min ZHANG Ping WANG Shao-meng ZHANG Chao GONG Yu-bin 《真空电子技术》 2026年第1期21-27,共7页
Van der Waals(vdW)heterostructures have attracted much attention due to their distinctive optical,electrical,and thermal properties,demonstrating promising potential in areas such as photocatalysis,ultrafast photonics... Van der Waals(vdW)heterostructures have attracted much attention due to their distinctive optical,electrical,and thermal properties,demonstrating promising potential in areas such as photocatalysis,ultrafast photonics,and free electron radiation devices.Particularly,they are promising platforms for studying thermionic emission.It is illustrated that using vdW heterostructure-based thermionic emission can enhance heat transfer in vacuum devices.As a proof of concept,the approach is demonstrated to offer a promising solution for the long-standing overheating issue in X-ray tubes.Specifically,it is shown that the saturated target temperature of a 2000 W X-ray tube can be reduced from around 1200℃ to 490℃.Additionally,it is also demonstrated that by reducing the height of the Schottky barrier formed in the vdW heterostructures,the thermionic cooling performance can be enhanced.The findings pave the way for the development of high-power X-ray tubes. 展开更多
关键词 X-ray tube Heat transfer Thermionic emission Thermionic cooling Van der Waals Heterostructures
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Formation of crystalline Si9C15nano-islands and Si9C15/graphene heterostructures on Ru(0001) 认领 引用
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作者 Lijing Huang Yumeng Li +3 位作者 Hongqin Xiao Yuxuan He Geng Li Hong-Jun Gao 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期214-219,共6页
Two-dimensional silicon carbides have attracted increasing interest due to their highly tunable band structures and rich physical properties.Among them,Si9C15is particularly notable for its intrinsic auxeticity,... Two-dimensional silicon carbides have attracted increasing interest due to their highly tunable band structures and rich physical properties.Among them,Si9C15is particularly notable for its intrinsic auxeticity,strongly anisotropic carrier mobility,and pronounced optical and thermoelectric responses.However,the controlled growth of Si9C15nano-islands has remained a challenge.Here,we report a novel growth technique for Si9C15nano-islands.By exploiting the mild segregation of carbon atoms from a Ru(0001)substrate,we fabricate discrete,crystalline Si9C15nano-islands at temperatures as low as~400℃.Spectroscopic measurements reveal a spatial modulation of the local work function across the nano-island,which we attribute to the periodic potential landscape of the Si9C15lattice.Furthermore,we demonstrate that this island morphology enables the construction of Si9C15/graphene lateral heterostructures.Our work establishes a new pathway for fabricating Si9C15nanostructures as well as the heterostructures. 展开更多
关键词 Si9C15 nano-islands low-temperature growth heterostructure
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Reversible construction of rigid-flexible layered-tunnel heterostructures endowing MnO2 cathode with robust zinc ion storage 认领 引用
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作者 Zhuoyun Song Mingjun Cui +7 位作者 Yiguo Zhang Nan Zhang Haotian Yang Kangrui Ren Lang Chen Zong-Lin Liu Ying Xie Ting-Feng Yi 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期835-847,共13页
MnO2 emerges as a promising cathode material for aqueous zinc-ion batteries(AZIBs)due to its high theoretical capacity and ideal working voltage.However,inherent limitations in low electrical conductivity and struc... MnO2 emerges as a promising cathode material for aqueous zinc-ion batteries(AZIBs)due to its high theoretical capacity and ideal working voltage.However,inherent limitations in low electrical conductivity and structural instability restrict its widespread application.Herein,we fabricated layered δ-MnO2 and introduced Cu and Ce metal ions for structural regulation,thus constructing a δ/a-MnO2 heterostructure within the δ-MnO2 matrix,forming a heterointerface that simultaneously enhances the electrical conductivity and structural stability of the material.In this system,Cu2+acts as a catalyst,promoting the reduction of high-valent Mn to Mn2+and enabling local two-electron transfer,which significantly increases the discharge specific capacity of MnO2.For Ce3+,it functions as a structural regulator,inducing the partial transformation of δ-MnO2 to a-MnO2 and forming the δ/a-MnO2 heterostructure.Further supported by density functional theory(DFT)calculations and in-situ characterization results,the heterointerface between a-MnO2 andδ-MnO2 generates an internal electric field due to the difference in Fermi levels.This not only effectively enhances the electron transfer capability but also significantly improves structural stability.Benefiting from these advantages,the Cu,Ce co-incorporated MnO2(CCMO)cathode delivers a high discharge capacity of 455.4 mAh g-1at 0.2 A g-1and maintains 191.2 mAh g-1specific capacity after 1500 cycles with 95%capacity retention at 2 A g-1,which is significantly better than non-doped MnO2.This strategy of structural regulation and heterostructure construction using guest ions offers a new approach for developing high-performance Mn-based cathode materials for AZIBs. 展开更多
关键词 Aqueous zinc-ion battery MnO2 Heterostructure Zinc ions storage
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ZnAl-layered double hydroxides template-induced formation of ZnO/ZnSe heterostructures on the surface of coal-tar-pitchderived carbon for high-efficiency sodium storage 认领 引用
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作者 Yibo Zhao Peihua Li +6 位作者 Rufeng Tian Haochen Xie Yalong Wang Wanggang Zhang Xiaohong Li Jian Wang Yiming Liu 《Energy Materials and Devices》 CAS 2026年第2期16-30,共15页
Developing high-performance anodes from low-cost industrial byproducts is crucial for advancing sodium-ion batteries.Herein,we report a zinc–aluminum layered double hydroxide(ZnAl-LDH)template-induced strategy for fa... Developing high-performance anodes from low-cost industrial byproducts is crucial for advancing sodium-ion batteries.Herein,we report a zinc–aluminum layered double hydroxide(ZnAl-LDH)template-induced strategy for fabricating ZnO/ZnSe heterojunctions embedded within hierarchical porous carbon derived from coal tar pitch.The LDH serves as a dual functional structural template and pore-forming agent,enabling the in situ construction of intimately coupled ZnO/ZnSe–C interfaces.The designed ZnO/ZnSe heterostructure offers notable advantages:the heterojunction boosts charge transfer via interfacial contact between the two active components,while the mixed O2−/Se2−anion environment,combined with nanodispersed ZnO/ZnSe and the conductive carbon matrix,effectively enhances the reaction kinetics and mitigates volume strain.Consequently,the composite anode delivers a high reversible capacity of 637.5 mAh g−1 at 100 mA g−1 and retains 259.7 mAh g−1 after 1000 cycles at 5 A g−1.Kinetic analysis indicates that the superior rate performance is attributed to a dominant capacitive contribution(93.3%at 1.2 mV s−1).A full cell configured with an Na3V2(PO4)3 cathode demonstrates practical viability,retaining 147.5 mAh g−1 after 100 cycles.This work highlights the effectiveness of LDH-templated synthesis in constructing advanced heterostructure anodes for efficient sodium storage. 展开更多
关键词 anode material coal tar pitch layered double hydroxide heterostructure ZnSe sodium-ion battery
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