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Spin-selective and frequency-shift meta-holography based on reconfigurable origami chiral metasurface

Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 121-131页

作者： Zhibiao Zhu Lixin Jiang Zhe Qin Yongfeng Li Jiafu Wang Yuxiang Jia Lin Zheng Shaobo Qu shaanxi key laboratory of artificially-structured functional materials and devices Air Force Engineering UniversityXi’an710051China

Origami-based reconfigurable metasurfaces have emerged as a versatile paradigm for dynamically manipulating electromagnetic(EM) waves due to their advantages, such as low manufacturing cost, lightweight, and structural deformability. Three-dimensional(3D) deformation can intensify asymmetry among structures, making origami metasurfaces particularly suitable for realizing reconfigurable chiral responses. However, previous studies have primarily focused on modulating spectral properties,such as chiral switching and resonant frequency shifting. There remains ample room for further exploration in complex wavefront manipulation and holographic imaging applications. This paper proposes a simple and efficient deformation method for origami metasurfaces that transforms a spin-insensitive planar metasurface into a 3D metasurface by folding. The breaking of mirror symmetry induces a pronounced chiral response. The binary amplitude is modulated within each pixel. When folded at angles of +θ and-θ, the designed origami metasurface generates distinct images under left-handed circularly polarized(LCP)wave incidence. Meanwhile, holographic encryption is achieved under right-handed circularly polarized(RCP) wave ***, by leveraging origami's reconfigurability, the holographic imaging's operating frequency can be shifted. The experimental results agree well with the numerical calculations and full-wave simulations, demonstrating the broad application potential of this method in areas such as multi-channel imaging, information encryption technologies, and stealth.

关键词： hologram origami metasurface chiral response

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functional ternary salt construction enabling an in-situ Li3N/LiF-enriched interface for ultra-stable all-solid-state lithium metal batteries

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Journal of Energy Chemistry 2025年第2期101卷 68-75页

作者： Hong-Yan Liu Xin-Yu Liu Nan Zhang Peng-Fei Wang Zong-Lin Liu Jie Shu Ting-Feng Yi School of materials Science and Engineering Northeastern University key laboratory of Dielectric and Electrolyte functional material Hebei Province School of Resources and Materials Northeastern University at Qinhuangdao Faculty of materials Science and Chemical Engineering and key laboratory of Photoelectric Detection materials and devices of Zhejiang Province Ningbo University

Poly（ethylene oxide）-based polymer all-solid-state lithium metal batteries（ASSLBs） have received widespread attention due to their low cost,good process ability,and high energy ***,the growth of Li dendrites within polymer solid-state electrolytes damages the reversibility of Li anodes and still impedes their widespread *** efficient strategy is to construct a superior solid electrolyte ***,a stable interface enriched with Li3N and LiF is in-situ formed between Li anode and a terna ry salt *** terna ry salt electrolyte is innovatively designed by introducing lithium bis（trifluoromethane sulfonyl）imide（LiTFSI）,lithium bis（fluorosulfonyl）imide（LiFSI）,and LiNO3to poly（ethylene oxide） *** characterization indicates that LiNO3and LiFSI contribute to forming a Li3N-LiF-enriched interface and meanwhile LiTFSI ensures excellent ***,among various Li compound components,Li3N has high ionic conductivity,which is beneficial for reducing overpotential,while LiF has high interfacial energy which can enhance nucleation energy and suppress the formation of Li *** experimental results show that ASSLBs coupled with LiFePO4cathode display extremely excellent cycle stability approximately 2200 cycles at 2 C,with a final and corresponding discharge specific capacity of 96.7 mA h g-1. Additionally,a schematic illustration of the working mechanism for the Li3N-LiF interface is proposed.

关键词： All-solid-state lithium metal batteries In-situ SEI Lithium dendrite PEO (LiTFSI) Solid electrolyte

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Angular-adaptive spin-locked retroreflectors based on reconfigurable origami two-dimensional metagrating

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Chinese Optics Letters 2025年第1期 6-11页

作者：朱志标李勇峰秦哲蒋李鑫王雯洁陈红雅王甲富郑麟屈绍波 shaanxi key laboratory of artificially-structured functional materials and devices Air Force Engineering University

The retroreflector based on a gradient metasurface can reflect electromagnetic(EM) waves to the source, and it is small in size and lightweight. However, even if the previous retroreflectors can be used for angle adaptation, the working efficiency declines sharply at large angles. In this paper, a retroreflector is designed based on a reconfigurable origami two-dimensional(2D) metagrating for efficient spin-locked retroreflection and for suppressing unwanted Floquet diffraction *** the retroreflection, the handedness of the wave remains consistent with the incident. By changing the folding state of the origami metagrating, the adaptive tangential momentum can be transferred to the incident wave, providing high-performance retroreflection over a continuous incidence angle range of 30°–45.8°(x-direction) and 30°–81°(y-direction). As proof of concept, an electric metagrating-based retroreflector is fabricated in the microwave frequency band, and the simulation and experimental results are consistent. This adaptive origami spin-locked metasurface has promising applications in spin-optics devices, communication systems, remote sensing, and radar cross-section(RCS) enhancement.

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Modulation of the octahedral structure and potential superconductivity of La_(3)Ni_(2)O_(7)through strain engineering

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 145-152页

作者： Zihao Huo Zhihui Luo Peng Zhang Aiqin Yang Zhengtao Liu Xiangru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenxuan Chen Dao-Xin Yao Defang Duan Tian Cui key laboratory of material Simulation Methods&Software of Ministry of Education State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of PhysicsSun Yat-sen UniversityGuangzhou510275China MOE key laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an710049China Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo315211China

The recent transport measurements of La_(3)Ni_(2)O_(7)uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature(P-T)phase *** by this,we perform theoretical first-principles studies of La_(3)Ni_(2)O_(7)with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d_(z^(2))electron density at the Fermi energy(n_(z)^(E_(F)))that highly coincides with such *** this basis,we further explore the electronic structure under uniaxial *** tracking the stress response of n_(z)^(E_(F)),we propose that superconductivity can be achieved by applying only ~2GPa of compression along the c *** idea is further exemplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nz E Fand the superconducting T_(c)in La_(3)Ni_(2)O_(7)*** study provides new routes to the search of high-T_(c)superconductors in future experiments.

关键词： nickelate superconductors density functional theory strong correlated systems strain engineering

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Understanding the iodine electrochemical behaviors in aqueous zinc batteries

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Journal of Energy Chemistry 2025年第2期101卷 402-415页

作者： Xuefang Xie Xiaoxin Xu Shuquan Liang Guozhao Fang College of Physical Science and Technology Xinjiang University Xinjiang key laboratory of Solid State Physics and devices Xinjiang University School of materials Science & Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University National Energy Metal Resources and New materials key laboratory Central South University

Iodine is widely used in aqueous zinc batteries（ZBs） due to its abundant resources,low cost,and active redox *** addition to the active material in zinc-iodine batteries,iodine also plays an important role in other ZBs,such as regulating the electrochemical behavior of zinc ions,promoting the reaction kinetic and reversibility of other redox pairs,catalytic behaviors related to iodine reactions,coupling with other halogen ions,shuttle behaviors of polyiodides,***,there is currently a lack of comprehensive discussion on these ***,this review provides a comprehensive overview of the electrochemical behaviors of iodide in the aqueous *** effect of iodine ions on the Zn2+desolvation behaviors and the interfacial behaviors of Zn anode was *** redox pairs boosting other redox pairs,such as MnO2/Mn2+redox pair and vanadium redox pair to obtain high reversibility and capacity was also ***,the catalytic behaviors related to iodine reactions in aqueous ZBs,synergistic reaction with other halogen ions and suppression of shuttle behaviors for high performance zinc-iodine batteries were systematically ***,future prospects for designing effective iodine electrochemical behaviors with practicability are proposed,which will provide scientific guidance for the practical application of iodine-related aqueous ZBs.

关键词： Catalytic behavior Iodide ion Redox pairs Shuttle effect Zinc batteries

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Proton transport in unsintered BaCe_(0.8)Y_(0.2)O_(3-α) for easily prepared electrochemical devices

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Journal of Rare Earths 2025年第1期43卷 133-145,I0006页

作者： Xi Wang Yushi Ding Ying Li Gaopeng Zhou Wenlong Huang Liaoning key laboratory for Metallurgical Sensor material and Technology School of MetallurgyNortheastern UniversityShenyang110819China

BaCe_(0.8)Y_(0.2)O_(3)-αceramics exhibit superior conductivity among related ***,the hightemperature sintering makes it difficult to prepare electrochemical devices with a BaCe_(0.8)Y_(0.2)O_(3)-αmultilayer film,and very few studies have examined the conductivity and transport properties of unsintered BaCe_(0.8)Y_(0.2)O_(3)-α.In nominally dry conditions,the instability of this material in a watercontaining atmosphere can be minimized,allowing the unsintered BaCe_(0.8)Y_(0.2)O_(3)-αto be applied in some particular test environment as a component of electrochemical ***,the conductivity of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αin dry conditions was measured via AC impedance spectroscopy in the temperature range of 500-800℃.The unsintered BaCe_(0.8)Y_(0.2)O_(3)-αexhibits high conductivity and hydration ability,as well as low proton activation *** addition,it shows high oxygen vacancy and low proton transport numbers at high temperature,limited by its grain *** work provides insights into the conductivity and proton transport of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αand demonstrates its potential as a proton-conducting electrolyte.

关键词： Protonic conductor Unsintered material BaCe_(0.8)Y_(0.2)0^(3-α) Conductivity Transport number Rare earths

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Non-specific/specific SERS spectra concatenation for precise bacteria classifications with few samples using a residual neural network

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Chinese Chemical Letters 2025年第1期36卷 484-490页

作者： Feihu Wu Gengwen Chen Kaitao Lai Shiqing Zhang Yingchao Liu Ruijian Luo Xiaocong Wang Pinzhi Cao Yi Ye Jiarong Lian Junle Qu Zhigang Yang Xiaojun Peng Shenzhen key laboratory of Photonics and Biophotonics&College of Physics and Optoelectronic Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceShenzhen UniversityShenzhen 518060China Hematology Reagent R&D department Mindray Bio-medical Electronics Co.LTD.Shenzhen 518107China State key laboratory of Fine Chemicals College of Material Science and EngineeringShenzhen UniversityShenzhen 518060China

Deep learning neural network incorporating surface enhancement Raman scattering technique(SERS)is becoming as a powerful tool for the precise classifications and diagnosis of bacterial ***,the large amount of sample requirement and time-consuming sample collection severely hinder its *** herein propose a spectral concatenation strategy for residual neural network using nonspecific and specific SERS spectra for the training data augmentation,which is accessible to acquiring larger training dataset with same number of SERS spectra or same size of training dataset with fewer SERS spectra,compared with pure non-specific SERS *** this strategy,the training loss exhibit rapid convergence,and an average accuracy up to 100%in bacteria classifications was achieved with50 SERS spectra for each kind of bacterium;even reduced to 20 SERS spectra per kind of bacterium,classification accuracy is still>95%,demonstrating marked advantage over the results without spectra *** method can markedly improve the classification accuracy under fewer samples and reduce the data collection workload,and can evidently enhance the performance when used in different machine learning models with high generalization ***,this strategy is beneficial for rapid and accurate bacteria classifications with residual neural network.

关键词： SERS Deep learning Resnet Bacteria classification Spectra concatenation

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Optimizing large optical contrast in Ge-Se-Te films via high-throughput method

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Progress in Natural Science:materials International 2025年第01期 222-228页

作者： Qiqi Chen Guoxiang Wang Zijun Liu Yixiao Gao Chenjie Gu Tiefeng Xu Xiang Shen Yimin Chen laboratory of Infrared material and devices & key laboratory of Photoelectric materials and devices of Zhejiang Province Advanced Technology Research InstituteNingbo University Department of Microelectronic Science and Engineering School of Physical Science and Technology Ningbo University Ningbo Solartrum Co.Ltd.

Chalcogenide phase-change materials（PCMs） have attracted great attentions due to their potential applications in reconfigurable photonic devices. The Ge2Sb2Te5and GeTe PCMs exhibit significant difference in refractive index（Δn） between amorphous and crystalline states, but they suffer from high optical loss. The binary Sb2S3and Sb2Se3PCMs, however, show low optical loss but small Δn. This encourages us to develop the novel materials,which are desired to combine large Δn and low optical loss. Instead of traditional trial-and-error screening method, we here used an efficient high-throughput method to optimize the PCMs' candidates for reconfigurable photonic devices in Ge-Se-Te chalcogenides. The crystallization temperature and difference in optical bandgap were detected, and then the component of Ge25Se7Te68, which also exhibits ultralow optical loss of 1.2 × 10-6（in amorphous state） and large Δn of 1.32 at 1550 nm, was optimized. This Te-rich Ge-Se-Te film can be a candidate for the applications of programmable reconfigurable photonic circuits.

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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self‑Powered Motion Sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： Yu‑Ze Wang Yu‑Chang Wang Ting‑Ting Liu Quan‑Liang Zhao Chen‑Sha Li Mao‑Sheng Cao School of materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of materials Science and Engineering Peking UniversityBeijing 100871People’s Republic of China School of Mechanical and material Engineering North China University of TechnologyBeijing 100144People’s Republic of China key laboratory of functional Inorganic material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. In this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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Revealing the Role of Hydrogen in Highly Efficient Ag-Substituted CZTSSe Photovoltaic devices:Photoelectric Properties Modulation and Defect Passivation

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Nano-Micro Letters 2025年第4期17卷 166-180页

作者： Xiaoyue Zhao Jingru Li Chenyang Hu Yafang Qi Zhengji Zhou Dongxing Kou Wenhui Zhou Shengjie Yuan Sixin Wu The key laboratory for Special functional materials of MOE School of Nanoscience and Materials EngineeringNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004People’s Republic of China

The presence of SnZn-related defects in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)absorber results in large irreversible energy loss and extra irreversible electron-hole non-radiative recombination,thus hindering the efficiency enhancement of CZTSSe *** the incorporation of Ag in CZTSSe can effectively suppress the SnZn-related defects and significantly improve the resulting cell performance,an excellent efficiency has not been achieved to date primarily owing to the poor electrical-conductivity and the low carrier density of the CZTSSe film induced by Ag ***,this study exquisitely devises an Ag/H co-doping strategy in CZTSSe absorber via Ag substitution programs followed by hydrogen-plasma treatment procedure to suppress SnZn defects for achieving efficient CZTSSe ***-depth investigation results demonstrate that the incorporation of H in Ag-based CZTSSe absorber is expected to improve the poor electrical-conductivity and the low carrier density caused by Ag ***,the C=O and O-H functional groups induced by hydrogen incorporation,serving as an electron donor,can interact with under-coordinated cations in CZTSSe material,effectively passivating the SnZn-related ***,the incorporation of an appropriate amount of Ag/H in CZTSSe mitigates carrier non-radiative recombination,prolongs minority carrier lifetime,and thus yields a champion efficiency of 14.74%,showing its promising application in kesterite-based CZTSSe devices.

关键词： CZTSSe Ag/H co-doping Photoelectric properties modulation Defect passivation Non-radiative recombination

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