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Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 533-547页

作者： Xiao You Huiying Ouyang Ruixiang Deng Qiuqi Zhang Zhenzhong Xing Xiaowu Chen Qingliang Shan Jinshan Yang Shaoming Dong State Key Laboratory of High Performance ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China University of Chinese Academy of Sciences Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

EFFECT OF H^(+)-IONS IMPLANTATION AND Ar^(+)-IONS BOMBARDMENT ON THE PROPERTIES OF LiNbO_(3) CRYSTAL SURFACES

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Chinese Physics Letters 1989年第2期6卷 72-75页

作者： FENG Xiqi SHANG Wei shanghai institute of ceramics Academia SinicaShanghai

The H^(+)-ions implantation and Ar^(+)-ions bombardment did not cause near-surface decomposition of LiNbO_(3),but it resulted in the alteration of the physical *** XPS(x-ray photoelectron energy spectroscopy)measureme... 详细信息

关键词： properties. implantation SURFACE

Effects of Annealing on Pt/Co Multilayer Films

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Chinese Physics Letters 1994年第3期11卷 169-172页

作者： JIANG Zhihong SHEN Defang SHI Tiansheng GUO Changlin GUO Rongfa shanghai institute of Metallurgy Academia SinicaShanghai 200050 shanghai institute of ceramics Academia SinicaShanghai 200050

Annealing effects are helpful guides to study Pt/Co multilayer interface ***,the results reported till now are *** we report the increase in coercivity Hc and the decrease in Kerr rotationθk after being annealed in v... 详细信息

关键词： compound. annealed multilayer

Fluorescence Properties of Nd : CeF_(3) Crystals

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Chinese Physics Letters 1994年第7期11卷 451-453页

作者： GAO Ming FENG Xiqi HU Guanqin YIN Zhiwen shanghai institute of ceramics Academia SinicaShanghai 200050

Four Nd:CeF_(3) crystals doped with 0.1,0.5,1.0 and 2.0 wt.% Nd^(3+)are grown,their absorption and fluorescence spectra are *** absorption bands of Nd:CeF_(3 ) are much wider than that of Nd:*** absorption peak at 353nm does not depend on Nd^(3+) concentration linearly and there exists no concentration quenching effect while Nd^(3+) concentration is less than 2.0wt.%.The fluorescence lifetime and the effective stimulated cross section are measured,respectively,as τ_(r)=300μs and σ_(c)=2.4 x 10^(-20) cm^(2).

关键词： absorption Nd:YAG Crystal

Optoelectronic Proper ties Modulated by Means of Change in Lattice Sites of Impurity in LiNbO_(3) Crystals

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Chinese Physics Letters 1993年第10期10卷 638-640页

作者： FENG Xiqi shanghai institute of ceramics Academia SinicaShanghai 200050

This paper discusses the actual possibility of altering artificially certain optoelectronic properties of LiNbO_(3) crystals by means of change in lattice site of a lew Me^(3+) ions in the crystals.A new lattice site ... 详细信息

关键词： vapour LiNbO lattice

Influences of Some Impurities on the Optical Transparency of Doped Bismuth Germanate Crystals

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Chinese Physics Letters 1991年第5期8卷 248-250页

作者： HU Guanqin FENG Xiqi HUA Sukun ZHAO Yuanlong shanghai institute of ceramics Academia SinicaShanghai 201080

Optical microscopy,optical transmission spectra,sweep electron microscope,electron microprobe analysis *** used to study the appearance and machanism of formation of the defects caused by impurities which seriously affect the optical transparency of doped bismuth *** methods of improving the optical transparency were also discussed.

关键词： transparency microprobe bismuth

High Fe‑Loading Single‑Atom Catalyst Boosts ROS Production by Density Effect for Efficient Antibacterial Therapy

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Nano-Micro Letters 2025年第2期17卷 187-203页

作者： Si Chen Fang Huang Lijie Mao Zhimin Zhang Han Lin Qixin Yan Xiangyu Lu Jianlin Shi Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China shanghai institute of ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China shanghai Frontiers Science Center of Nanocatalytic Medicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current single-atom catalysts(SACs)for medicine still suffer from the limited active site ***,we develop a synthetic method capable of increasing both the metal loading and mass-specific activity of SACs by exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high metal loading of 6.27 wt%and an optimized adjacent Fe distance of~4 A exhibit excellent oxidase-like catalytic performance without significant activity decay after being stored for six months and promising antibacterial ***,a“density effect”has been found at a high-enough metal doping amount,at which individual active sites become close enough to interact with each other and alter the electronic structure,resulting in significantly boosted intrinsic activity of single-atomic iron sites in h^(3)-FNCs by 2.3 times compared to low-and medium-loading ***,the overall catalytic activity of h^(3)-FNC is highly improved,with mass activity and metal mass-specific activity that are,respectively,66 and 315 times higher than those of commercial Pt/*** addition,h^(3)-FNCs demonstrate efficiently enhanced capability in catalyzing oxygen reduction into superoxide anion(O_(2)·^(−))and glutathione(GSH)*** in vitro and in vivo assays demonstrate the superior antibacterial efficacy of h^(3)-FNCs in promoting wound *** work presents an intriguing activity-enhancement effect in catalysts and exhibits impressive therapeutic efficacy in combating bacterial infections.

关键词： Nanocatalytic medicine Single-atom catalysts Reactive oxygen species(ROS) High metal loading Oxidase catalysis

POLAR MICRO-REGIONS AND SUPERLATTICE IN 7.9/70/30 PLZT ceramics

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Science China Mathematics 1990年第2期33卷 238-243页

作者：宋祥云温树林殷之文 shanghai institute of ceramics Academia Sinica

The microstructures of 7.9/70/30 (Pb92.1La7.9)(Zr70Ti30)O3 (PLZT) transparent ferroelectric ceramics are studied by using the high-resolution electron microscopy (HREM) techniques and electron diffraction. The results indicate that the structure of micro-domains presented in the cubic a-phase is exactly the same as that of its ferroelectric β-phase after poling. The fringe-shape micro-regions, appearing in the HREM microphotograph of 7.9/70/30 PLZT, are the result from lattice-overlapping of the orthorhomhic micro-domains and the cubic a-phase matrix. Furthermore, a 2×d111 superlattice along the -direction has been observed in 7.9/70/30 PLZT ceramics. This is probably the result of gliding or rotation on the (111)-plane of self-structure regulation due to point defects.

关键词： ferroelectric polar micro-region Moire electron diffraction super-lattice.

GRAIN CORE-GRAIN SHELL STRUCTURE AND LATTICE DEFECT IN SrTiO_3 ceramics

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Science China Mathematics 1991年第8期34卷 991-997页

作者：宋祥云黄瑞福温树林殷之文 shanghai institute of ceramics Academia Sinica Shanghai 200050 PRC

The core-shell structure in SrTiO_3 grains has been discovered with the analytical elec-tronic microscope (AEM). Further studies show that the core-shell structure is formed due tothe inhomogeneous distribution of Pb and Bi ions, which may influence the physical propertiesof ceramics. Additionally, high-resolution lattice images reveal the partial edge-sharing ofoctahedra in the SrTiO_3 crystal lattice, and this kind of lattice defect is not common in thestructure of the ABO_3-type ceramics.

关键词： grain core grain skell lattice defect ceramic.