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Dual-compressed photoacoustic single-pixel imaging

National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

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Highly toughened translucent glass matrix nanoceramics enhanced by amorphous Al_(2)O_(3)

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Journal of Advanced Ceramics 2025年第2期14卷 199-208页

作者： Huasi Zhou Yang Liu Le Fu Håkan Engqvist Wei Xia Department of Engineering Science Uppsala UniversityUppsala 75121Sweden School of Material Science and Engineering Central South UniversityChangsha 410083China

The introduction of glass matrix ceramics in dental restorations has revolutionized dental aesthetics. A key challenge in the development of dental glass ceramics is achieving nanocrystalline glass ceramics with superior mechanical properties without compromising translucency. In this study, ZrO_(2)–SiO_(2) glass ceramics doped with amorphous Al_(2)O_(3) were investigated to address these requirements. The results indicate that the segregation of Al3+ at the grain boundaries of ZrO_(2) crystallites and the nano-domains of amorphous Al_(2)O_(3) significantly influences the microstructure, including the grain size and stabilization of tetragonal ZrO_(2), as well as the translucency and mechanical properties. The composition with 10 mol% Al_(2)O_(3) exhibits the highest toughness of 8.05 MPa∙m1/2 while maintaining excellent translucency. Moreover, the composition with 5 mol% Al_(2)O_(3) demonstrates lower translucency but achieves a high flexural strength of 960 MPa. Overall, the mechanical properties of these translucent glass matrix ceramics surpass those of commercially available dental glass ceramics, highlighting their potential for dental restoration applications.

关键词： dental restorative material nanocrystalline glass ceramics ZrO2-SiO2 translucency mechanical propertie

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High-pressure synthesis of in-filled and Se-substituted high-thermoelectric performance skutterudite

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Ceramics International 2025年第16期51卷 21246-21253页

作者： Zhang, Zhicheng Wang, Xin Jing, Qi Lv, Xiaoling Deng, Le Department of Material Science and Engineering Changchun University of Science and Technology Changchun130022 China

CoSb3, as a medium temperature semiconductor thermoelectric material, has attracted much attention due to the abundant adjustable space provided by the Sb12 icosahedral cage structure and its excellent carrier mobility. However, its high lattice thermal conductivity makes it difficult to achieve coupled optimization of thermoelectric performance, which hinders its widespread application. Our work employed a high-pressure and high-temperature (HPHT) synthesis method to introduce point defects through In filling and Se substitution. In conjunction with high-pressure quenching to induce abundant nanoparticles, grain boundaries, and dislocations, we achieved a low lattice thermal conductivity of 0.99 W m−1 K−1 at 723 K. In addition, theoretical calculations confirm that the In filling combined with Se substitution for Sb increases the energy bands at the Fermi level, significantly enhancing the electrical conductivity and density of states. This additional energy band enabled the In0.5Co4Sb11.95Se0.05 sample synthesized under a pressure of 1.5 GPa to achieve a high power factor of 42.07 μ W cm−1 K−2 and a large zT value of 1.25 was obtained at 723 K. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Grain boundaries

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Towards implementation of alloy-specific thermo-fluid modelling for laser powder-bed fusion of Mg alloys

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Journal of Magnesium and Alloys 2024年第6期12卷 2327-2344页

作者： Mohammad Hoseini-Athar Mikael Ersson Peter Hedström Department of Material Science and Engineering KTH Royal Institute of TechnologyStockholmSE-10044 Sweden

Multi-physics thermo-fluid modeling has been extensively used as an approach to understand melt pool dynamics and defect formation as well as optimizing the process-related parameters of laser powder-bed fusion(L-PBF).However,its capabilities for being implemented as a reliable tool for material design,where minor changes in material-related parameters must be accurately captured,is still in *** the present research,first,a thermo-fluid computational fluid dynamics(CFD)model is developed and validated against experimental *** the predicted material properties of the pure Mg and commercial ZK60 and WE43 Mg alloys,parametric studies are done attempting to elucidate how the difference in some of the material properties,i.e.,saturated vapor pressure,viscosity,and solidification range,can influence the melt pool *** is found that a higher saturated vapor pressure,associated with the ZK60 alloy,leads to a deeper unstable keyhole,increasing the keyhole-induced porosity and evaporation mass *** viscosity and wider solidification range can increase the non-uniformity of temperature and velocity distribution on the keyhole walls,resulting in increased keyhole instability and formation of ***,the WE43 alloy showed the best behavior in terms of defect formation and evaporation mass loss,providing theoretical support to the extensive use of this alloy in *** summary,this study suggests an approach to investigate the effect of materials-related parameters on L-PBF melting and solidification,which can be extremely helpful for future design of new alloys suitable for L-PBF.

关键词： Mg alloys Laser powder-bed fusion(L-PBF) Melt pool dynamics Computational fluid dynamics Fluid flow

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Texture development and surface reconstruction of BiVO_(4)photoanode via one-pot hydrothermal reaction for enhanced photoelectrochemical water splitting

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Journal of Advanced Ceramics 2025年第3期14卷 133-141页

作者： Sung Won Hwang Yoo Jae Jeong Runfa Tan Indhujasri Saravanan Hyun Soo Han Dong Hoe Kim In Sun Cho Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Material Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Mechanical Engineering Stanford UniversityStanford 94305USA Department of Material Science&Engineering Korea UniversitySeoul 02841Republic of Korea Materials Science and Engineering Program University of Colorado BoulderBoulder 80303USA

The simultaneous optimization of the bulk and surface characteristics of photoelectrodes is essential to maximize their photoelectrochemical(PEC)*** report a novel one-pot hydrothermal synthesis of textured and surface-reconstructed BiVO_(4)photoanodes(ts-BVO),achieving significant improvements in PEC water *** controlling precursor molarity and ethylene glycol(EG)addition,we developed a stepwise dual reaction(SDR)mechanism,which enables simultaneous bulk texture development and surface *** optimized CoBi/ts-BVO photoanode exhibited a photocurrent density of 4.3 mA∙cm^(−2)at 1.23 V *** hydrogen electrode(RHE)with a high Faradaic efficiency of 98%under one sun *** with nontextured BiVO_(4),the charge transport efficiency increased from 8%to 70%,whereas the surface charge transfer efficiency improved from 9%to 85%.These results underscore the critical role of both bulk and surface engineering in enhancing PEC *** findings offer a streamlined approach for improving the intrinsic properties of photoanodes in solar water splitting.

关键词： BiVO_(4) hydrothermal texture surface reconstruction ethylene glycol(EG) photoelectrochemical water splitting

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Synchronous regulation of V_(2)O_(5) cathode and Zn anode using sodium gluconate as an additive for long-life aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第4期103卷 703-713页

作者： Rongkun Sun Dan Luo Hongyang Zhou Zhaolong Zhang Yinuo Gao Siyuan Ma Zhi Li Xiaohong Kang Department of Materials Science and Engineering School of Physical Science and EngineeringBeijing Jiaotong UniversityBeijing 100044China Beijing Key Laboratory of Environmental Science and Engineering School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Aqueous zinc-ion batteries(AZIBs)are gaining attention owing to their affordability,high safety,and high energy density,making them a promising solution for large-scale energy ***,their performance is hampered by the instability of both the anode-electrolyte interface and the cathode-electrolyte *** use of sodium gluconate(SG),an organic sodium salt with multiple hydroxyl groups,as an electrolyte additive is *** and theoretical analyses demonstrate that Na^(+)from SG can intercalate and deintercalate within the associated V_(2)O_(5) cathode during in situ electrochemical *** action supports the layered structure of V_(2)O_(5),prevents structural collapse and phase transitions,and enhances Zn^(2+)diffusion ***,the gluconate anion disrupts the original Zn^(2+)solvation structure,mitigates water-induced side reactions,and suppresses Zn dendrite *** synchronous regulation of both the V_(2)O_(5) cathode and Zn anode by the SG additive leads to considerable performance ***‖Zn symmetric batteries demonstrate a cycle life exceeding 2800 h at 0.5 mA cm^(-2)and 1 mAh cm^(-2).In Zn‖V_(2)O_(5) full batteries,a high specific capacity of 288.92 mAh g^(-1)and capacity retention of 82.29%are maintained over 1000 cycles at a current density of 2 A g^(-1).This multifunctional additive strategy offers a new pathway for the practical application of AZIBs.

关键词： Aqueous zinc-ion batteries Sodium gluconate Vanadium oxides Zn anode Cycling stability High specific capacity

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Phosphorus incorporation-induced adsorption behavior modulation for carbon cathodes enables ultrastable and high-energy aqueous Zn-ion hybrid capacitors

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science China Chemistry 2025年第3期68卷 900-907页

作者： Lai Yu Xiaoyue He Rong Liu Guanglin Wan Xinyi Ma Anqiang Pan Liang Shi Genqiang Zhang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Material for Energy ConversionDepartment of Material Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China School of Materials and Engineering Xinjiang UniversityUrumqi 830046China

The aqueous zinc ions hybrid capacitors(ZHCs)have great potential for future energy storage devices by their high safety and low cost merits,more importantly,it could combine the advantages of batteries and supercapacitors with high energy density and power output,***,the development of reliable cathodes is still a challenge with the unsatisfactory cycling stability and limited reaction kinetic,severely restricting its further commercial ***,we present phosphorus functionalized nitrogen-doped hierarchical porous carbon nanosheets(PN-HPCNS),where the P incorporation could effectively enhance the electronic transfer kinetics and ion adsorption capability to achieve superior zinc-ion storage *** asprepared PN-HPCNS cathode-based ZHC exhibits a high energy and power density(169.1 Wh kg^(-1)/68 W kg^(-1),15,840 W kg^(-1)/30.8 Wh kg^(-1))and long cycling lifespans more than 20,000 cycles with 92.0%capacity *** characterizations coupled with kinetics studies indicate that phosphorus modification is crucial to superior zinc ion storage,enabling PN-HPCNS with favorable reaction kinetics,promoting ion adsorption by providing more active ***,the theoretical calculation reveals that the phosphorus modification could enhance the adsorption ability,contributing to the superior ZHCs performance of PN-HPCNS.

关键词： carbon zinc ion hybrid capacitors cathode nanosheet density function theory

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A heterogeneous composite derived from natural halloysite nanotubes with excellent electromagnetic interference shielding performance

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Ceramics International 2025年第14期51卷 18877-18885页

作者： Wu, Xiaomei Qiu, Munan Wen, Bianying Department of Material Science and Engineering Beijing Technology and Business University Beijing100048 China

For electromagnetic interference (EMI) shielding materials, hollow structure is beneficial for improving the attenuation ability to electromagnetic waves, and one-dimensional structure facilitates overlapping to promote electrons transfer. Halloysite nanotubes (HNTs) is a kind of low-cost natural material, the distinctive one-dimensional hollow structure endows HNTs significant advantage as EMI shielding materials. In this study, conductive and magnetic nickel (Ni) nanoparticles were coated on electrically insulating HNTs via electroless plating method, the fabricated Ni@HNTs presented excellent EMI shielding performance. The external Ni nanoparticles on Ni@HNTs provided dielectric and magnetic loss to the electromagnetic (EM) waves, and the hierarchical architecture constructed by Ni nanoparticles and hollow HNTs generated abundant heterogeneous interfaces and defects, enhancing interfacial polarization and dipole polarization. In particular, the hollow structure of HNTs provided propagation paths for EM waves, continuously reflected and dissipated EM waves, thus enhancing the attenuation ability of Ni@HNTs to electromagnetic waves. Benefiting from the synergistic effect of composition and special architecture, the obtained Ni@HNTs composite exhibited an outstanding EMI shielding effectiveness (>50 dB under X-band). This study expands the application of HNTs for electromagnetic shielding and provides a promising structural design of EMI shielding materials for next-generation communications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Electromagnetic shielding

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Incorporation of Ionic Conductive Polymers into Sulfide Electrolyte-Based Solid-State Batteries to Enhance Electrochemical Stability and Cycle Life

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Energy & Environmental materials 2024年第6期7卷 4-12页

作者： Juhyoung Kim Woonghee Choi Seong-Ju Hwang Dong Wook Kim Advanced Materials Division Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Department of Material Science and Engineering Yonsei UniversitySeoul 03722Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Korea Advanced Materials and Chemical Engineering University of Science and Technology(UST)Daejeon 34113Korea

Sulfide-based inorganic solid electrolytes are promising materials for high-performance safe solid-state *** high ion conductivity,mechanical characteristics,and good processability of sulfide-based inorganic solid electrolytes are desirable properties for realizing high-performance safe solid-state batteries by replacing conventional liquid ***,the low chemical and electrochemical stability of sulfide-based inorganic solid electrolytes hinder the commercialization of sulfide-based safe solid-state ***,the instability of sulfide-based inorganic solid electrolytes is intensified in the cathode,comprising various *** this study,carbonate-based ionic conductive polymers are introduced to the cathode to protect cathode materials and suppress the reactivity of sulfide *** instruments,including electrochemical spectroscopy,X-ray photoelectron spectroscopy,and scanning electron microscopy,confirm the chemical and electrochemical stability of the polymer electrolytes in contact with sulfide-based inorganic solid ***-based solid-state cells show stable electrochemical performance over 100 cycles when the ionic conductive polymers were applied to the cathode.

关键词： composite cathode electrochemical stability ionic conductive polymer solid-state battery sulfide solid electrolyte

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Energy saving analysis for CO_(2)–O_(2)mixed injection technology in converter steelmaking

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Journal of Iron and Steel Research International 2024年第5期31卷 1095-1103页

作者： Bao-chen Han Chun-liang Gao Ya-qiang Li Dan Liu Guang-sheng Wei Rong Zhu Hebei Key Laboratory of Material Near-Net Forming Technology School of Material Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018HebeiChina Department of Automotive Engineering Hebei Vocational University of Technology and EngineeringXingtai054000HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Energy-saving in China's iron and steel industry still relies on the development and improvement of short-term energy saving ***,a special converter smelting technology incorporating energy saving was *** evaluate the energy-saving potential of the CO_(2)–O_(2)mixed injection(COMI)technology,collected production data were used to develop an improved techno-economic *** reveal that the technology can save energy through auxiliary material consumption,sensible heat of solid by-product,iron loss reduction,and energy *** application of COMI technology in an enterprise is cost effective,involving the energy saving potential of 0.206 GJ/t,the cost of conserved energy of−48.83 yuan/GJ,and a simple payback period of 0.35 year for a 60-million-yuan *** analysis shows that the investment cost and discount rate primarily influence the cost of conserved energy of the *** the discount rate increased,the cost of conserved energy also gradually ***,the COMI technology is an energy-saving technology with good development prospects.

关键词： Converter steelmaking COMI technology Energy saving Techno-economic model Investment cost

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