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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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SrGa_(12)O_(19):The first low-ε_(r) Ga-based microwave dielectric ceramic with anomalous positiveτ_(f)

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Journal of Advanced Ceramics 2024年第9期13卷 1432-1441页

作者： Yang Yang Weishuang Fang Huixing Lin Jie Li Huaicheng Xiang Ying Tang Lei Li Liang Fang Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices and Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Key Laboratory of Inorganic Functional Material and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Laboratory of Dielectric Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310058China

Dielectric ceramics with low permittivity(ε_(r)),high quality factor(Q×f),and near-zero resonant frequency(τ_(f))in the microwave bands are key materials used in fifth/sixth-generation(5G/6G)telecommunication,whileτ_(f) of most low-εr microwave dielectric ceramics is relatively *** this work,the first low-εr Ga-based ceramic SrGa_(12_O_(19) with an anomalous positiveτ_(f) was reported,and the causes of the positiveτ_(f),intrinsic polarization,and loss mechanism were systematically studied.X-ray diffraction(XRD)and transmission electron microscopy(TEM)revealed that the SrGa_(12_O_(19) ceramic formed a pure hexagonal magnetoplumbite structure with spinel blocks and rock-salt blocks stacked along the crystallographic *** sintered at 1430℃,it possessed the optimal microwave dielectric properties of a lowεr of 14.46,high Q×f of 64,705 GHz,and exceptional positiveτ_(f) of+55.7 ppm/℃,along with a low linear thermal expansion coefficient(αL)of 11.617 ppm/℃.The large positive deviation betweenεr andεr(C–M)of 45.31%resulted from the rattling effect of atoms in the rock-salt *** unique positiveτ_(f)(+55.7 ppm/℃)was governed by the rattling effect,resulting in a positiveταm(the temperature coefficient of ion polarizability)of 8.489 ppm/℃ and a large negative temperature coefficient of permittivity(τε)of−132.864 ppm/℃.Phillips–Vechten–Levine(P–V–L)chemical bond theory revealed greater contributions of the spinel block to bond ionicity(fi,52.95%),permittivity(ε,55.15%),bond energy(E,56.87%),and lattice energy(U,74.88%)than those of the rock-salt *** intrinsic dielectric properties were analyzed using infrared(IR)reflectivity *** favorable performance of the SrGa_(12)O_(19) ceramic indicated that it is a novelτ_(f) *** selection of compounds with different structural layer combinations provides a new idea for exploring excellent microwave dielectric ceramics.

关键词： magnetoplumbite microwave dielectric properties rattling effect chemical bond theory

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Tin-mediated carbon-confined Pt_(3)Co ordered intermetallic nanoparticles as highly efficient and durable oxygen reduction electrocatalysts for rechargeable zinc-air batteries

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Journal of Energy Chemistry 2024年第11期98卷 169-179页

作者： Ruotao Yang Chuhan Dai Laiwei Zhang Ruirui Wang Kui Yin Bo Liu Ziliang Chen Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123JiangsuChina Suzhou Key Laboratory for Nanophotonic and Nanoelectronic Materials and Its Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009JiangsuChina

The development of electrocatalysts for the oxygen reduction reaction(ORR) that bears high selectivity,exceptional activity,and long-term stability is crucial for advancing various green energy *** composed of platinum and transition metals are considered to be promising candidates for this ***,they typically face challenges such as unfavorable intrinsic activity and a propensity for particle aggregation,diminishing their ORR *** this backdrop,we present our findings on a N-doped carbon confined Pt_(3)Co intermetallic doped with p-block metal tin(Pt_(3)Co_(x)Sn_(1-x)/NC).The introduction of Sn induces lattice strain due to its larger atomic size,which leads to the distortion of the Pt_(3)Co lattice structure,while the coupling of carbon polyhedra inhibits the particle *** optimized Pt_(3)Co_(0.8)Sn_(0.2)/NC catalyst demonstrates an impressive half-wave potential of 0.86 V versus RHE,surpassing both Pt_(3)Co/NC and Pt_(3)Sn/NC ***,the Pt_(3)Co_(0.8)Sn_(0.2)/NC exhibits a mass-specific activity as high as 1.4 A mg_(Pt)^(-1),ranking it in the top level among the intermetallicsbased ORR *** further employed as a cathode material in a self-assembled zinc-air battery,it shows stable operation for over 80 *** results underscore the significant impact of lattice strain engineering through the strategic doping of p-block metal in the carbon-confined Pt_(3)Co intermetallic,thereby enhancing the catalytic efficiency for the ORR.

关键词： Lattice strain Pt-based intermetallic N-doped carbon Electrocatalysis Oxygen reduction reaction

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Reduced Macrophage Uptake of Nanoparticles through Surface Modification of Polypeptides with Valine Residues

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Chinese Journal of Chemistry 2024年第11期42卷 1209-1216页

作者： Ning Li Shanshan Xiao Xiaoxiong Jin Ziyuan Song Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhouJiangsu215123 China

The structural and surface properties of nanomedicines play an important role in determining their biological fate. Surface chemistry of nanomedicines is one of the key parameters, where researchers used various strategies such as PEGylation to avoid the undesired clearance of nanoparticles (NPs) for enhanced targeting effect. Nevertheless, the fine-tuning of surface chemistry through polymer functionalization remains largely unexplored. In this concise report, we find that the incorporation of only 10 mol% valine residues into the surface-anchored poly(L-glutamic acid) significantly lowered the macrophage uptake of NPs. The introduction of other hydrophobic amino acid residues, however, increased the NPs internalization instead. The chirality and the side-chain structure of valine played an important role in the unexpected uptake behavior. We believe this work highlights the impact of slight changes of the surface-anchored polymer structure on the behavior of NPs, drawing people's attention to the careful design of surface chemistry to optimize the nanomedicine design.

关键词： Nanoparticles Copolymers Structure-activity relationships Surface chemistry Polypeptide Macrophage uptake

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Structure and superconducting properties of Ru_(1-x)Mo_(x)(x=0.1-0.9)alloys

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Chinese Physics B 2024年第4期33卷 173-179页

作者：付阳龚春生涂志俊田尚杰王守国雷和畅 Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Key Laboratory of Quantum State Construction and Manipulation Renmin University of ChinaBeijing 100872China Anhui Key Laboratory of Magnetic Functional Materials and Devices School of Materials Science and EngineeringAnhui UniversityHefei 230601China

We report the detailed crystal structures and physical properties of Ru_(1-x)Mo_(x)alloys in the solid solution range of x=*** characterizations indicate that the crystal structure changes from the hcp-Mg-type,toβ-CrFe-type,and then *** measurements of physical properties show that the Ru_(1-x)Mo_(x)samples with x≥0.2are superconductors and the superconducting transition temperature T_c as a function of Mo content exhibits a dome-like behavior.

关键词： superconductivity alloy crystal structures Ru_(1-x)Mo_(x)

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Non-hygroscopic ionogel-based humidity-insensitive iontronic sensor arrays for intra-articular pressure sensing

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National Science Review 2024年第11期11卷 183-193页

作者： Junli Shi Sai Xie Zhiguang Liu Minkun Cai Chuan Fei Guo Department of Materials Science and Engineering Southern University of Science and Technology Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and Technology

Implanted pressure sensors can provide pressure information to assess localized health conditions of specific tissues or organs, such as the intra-articular pressure within knee joints. However, the prerequisites for implanted sensors pose greater challenges than those for wearables or for robots: aside from biocompatibility and tissue-like softness, they must also exhibit humidity insensitivity and high-pressure resolution across a broad pressure spectrum. Iontronic sensors can provide superior sensing properties, but they undergo property degradation in wet environments due to the hygroscopic nature of their active component: ionogels. Herein, we introduce a humidity-insensitive iontronic sensor array based on a hydrophobic and tough ionogel polymerized in a hydrophobicity transition yielding two hydrophobic phases: a soft liquid-rich phase that enhances ionic conductivity and ductility, and a stiff polymer-rich phase that contributes to superior toughness. We demonstrate the in vivo implantation of these sensor arrays to monitor real-time intra-articular pressure distribution in a sheep model, while assessing knee flexion with an angular resolution of 0.1° and a pressure resolution of 0.1%. We anticipate that this sensor array will find applications in various orthopedic surgeries and implantable medical devices.

关键词： iontronic pressure sensor phase separation humidity-insensitive ionogel biocompatibility intra-articular pressure sensing

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Na_(2)B_(6)SO_(13) with unprecedented [B_(6)SO_(13)]_(∞) double chains and largest birefringence among borosulfates induced by the uniform arrangement of [B_(3)O_(7)] units

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Science China Chemistry 2025年第2期68卷 475-480页

作者： Jinbin Fan Ziting Yan Zilong Chen Huimin Li Zhihua Yang Fangfang Zhang Shilie Pan Research Center for Crystal Materials State Key Laboratory of Functional Materials and Devices for Special Environmental ConditionsXinjiang Key Laboratory of Functional Crystal MaterialsXinjiang Technical Institute of Physics and ChemistryChinese Academy of SciencesUrumqi 830011China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Birefringence is crucial for birefringent crystals to modulate polarized light and nonlinear optical crystals to enable *** is closely related to the arrangement of advantageous functional groups with large microcosmic polarizability anisotropy in the ***,designing crystals with large birefringence by modulating the arrangement of advantageous functional groups is still a *** this work,the arrangement of the advantageous[B_(3)O_(7)]groups is optimized by introducing rigid tetrahedral[SO_(4)]groups,resulting in a novel boron-rich borosulfate,Na_(2)B_(6)SO_(13) ,which exhibits unprecedented[B_(6)SO_(13)]_(∞)double chain and an enhanced birefringence(Δn=0.07 at 589.3 nm)against the borate parent *** calculations confirm that the birefringence is mainly attributable to the uniform alignment of[B_(3)O_(7)]***_(2)B_(6)SO_(13) also possesses a deep ultraviolet(DUV)cutoff edge(λ<185 nm).This work provides a feasible method to design DUV birefringent crystals with large birefringence by inducing the arrangement of advantageous functional groups.

关键词： borosulfate deep ultraviolet birefringence modulated groups

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Nanoparticle accumulation in liver may induce resistance to immune checkpoint blockade therapy

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Nano Research 2023年第4期16卷 5237-5246页

作者： Huaxing Dai Qianyu Yang Rong Sun Yue Zhang Qingle Ma Yifan Shen Beilei Wang Yitong Chen Jialu Xu Bo Tian Fang Xu Chao Wang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China

Despite immune checkpoint blockade(ICB)therapy has transformed cancer treatment,only 20.2%of these patients achieved a *** resistance mechanisms to ICB is important for the treatment of a wider *** this work,we occasionally found that the silica nanoparticles(SiO_(2)NPs)accumulated in the liver can induce resistance to following ICB therapy to a subcutaneous tumor in *** analysis of T cells frequency,we uncovered that SiO_(2)NPs in the liver resulted in a siphoning of T cells from circulation to the liver by produced *** addition,liver immunosuppressive cells further inhibit the function and induce apoptosis of recruited T cells,leading to a systemic loss and reduced tumor infiltration of T cells,which contributes to poor responses to ICB ***,such effect is not observed in poly(lactic-co-glycolic acid)(PLGA)NPs treated mice under the same conditions,likely due to their much lower immunogenicity in perturbing the liver immune microenvironment,indicating that cancer is not a local disease but an ecosystem that is linked to the distal *** further provide a new mechanism insight into ICB resistance induced by liver accumulation of nanoparticles.

关键词： liver induce resistance

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Upvaluing chlorinated plastic wastes

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Interdisciplinary materials 2025年第1期4卷 5-23页

作者： Shuyi Zhang Hao Han Muhan Cao Yeping Xie Jinxing Chen Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon Based Functional Materials and DevicesSoochow UniversitySuzhouChina

Plastics are a ubiquitous and growing presence in our lives,with chlorinated plastics,like polyvinyl chloride(PVC),playing a pivotal role due to their superior ***,the disposal and recycling of these materials present significant *** chlorine content can harm catalysts,corrode equipment,and create dangerous pollutants,making the management of chlorinated plastic waste a critical issue in recycling *** is a pressing need for green,effective,and atom-efficient methods to handle this waste *** review explores the potential for converting chlorin-ated plastic waste into valuable *** examine four key areas for upcycling and reusing PVC waste,including innovative separation techniques,leveraging the PVC molecular structure,and recycling the chlorine and carbon components inherent in *** offering a thorough analysis of current recycling strategies and highlighting existing solutions,our review aims to inform and inspire further research in this crucial field,pushing towards more sustainable waste management practices.

关键词： chlorinated plastic plastic pollution polyvinyl chloride sustainability upcycling

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Low dielectric loss in vanadium-based zircon ceramics via high-entropy strategy

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Journal of Advanced Ceramics 2025年第1期14卷 151-161页

作者： Yuheng Zhang Huaicheng Xiang Xiaoyu Wu Yang Zhou Ying Tang Liang Fang College of Physics and Electronic Information Engineering Guilin University of TechnologyGuilin 541004China Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China

Zircon ceramics have potential applications in next-generation wireless communication because of their low permittivity and adjustable temperature coefficient at microwave ***,the vast challenge of realizing ultralow dielectric loss still ***,we propose a high-entropy strategy to enhance the bonding of the A-site dodecahedron in zircon and design(Nd_(0.2)Eu_(0.2)Y_(0.2)Ho_(0.2)Yb_(0.2))VO_(4) ceramics with a high quality factor(high Q×f,that is,low dielectric loss).The(Nd_(0.2)Eu_(0.2)Y_(0.2)Ho_(0.2)Yb_(0.2))VO_(4) high-entropy ceramics,which belong to the tetragonal zircon structure with the I4_(1)/amd space group,exhibit a low relative permittivity(ε_(r)=11.55),a negative temperature coefficient of resonant frequency(τ_(f)=−37.3 ppm/℃),and a high Q×f of 76,400 GHz(at 12.31 GHz).The high Q×f value can be attributed to the high chemical bond strength and structural ***,the relationship between the crystal structure and the microwave dielectric properties of(Nd_(0.2)Eu_(0.2)Y_(0.2)Ho_(0.2)Yb_(0.2))VO_(4) high-entropy ceramics was analyzed through high resolution transmission electron microscopy(HRTEM),Raman spectroscopy,far-infrared reflection spectroscopy,and chemical bond *** work provides an effective avenue for designing microwave dielectric materials with low loss to meet the demands of passive components.

关键词： high-entropy ceramics vanadium-based zircon microwave dielectric properties low dielectric loss chemical bond characteristics

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