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Terahertz ultra-wideband metamaterial absorber based on superposition optimization

materials Research Bulletin 2025年 192卷

作者： Zhang, Yuqiang Deng, Xin-Hua Geng, Jiaqi Xiong, Zhipeng Hu, Ping School of Physics and Materials Science Nanchang University Nanchang330031 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chongqing Research Institute of Nanchang University Nanchang330031 China

This paper presents a novel absorber with multiple absorbers assembled into a single unit by patterned composite superposition and embedded stacking. The absorber proposed in this paper can realize high absorption of electromagnetic waves in the range of 1.96 THz-11.85 THz with a relative absorption bandwidth of 143.2 %. Functionally, these absorbers exhibit ultra-broadband absorption, polarization insensitivity, and dynamic tunability, and maintain broadband absorption at incident angles up to 60° Their structural design is notable for its simplicity, limited variety of materials, and compact size. This paper summarizes the ideas and experiences in optimization using the superposition principle and innovatively analyses and investigates the cause of peak attenuation in the case of superposition of multiple absorbers from the perspectives of equivalent circuits and impedance matching, which provides a more precise idea for subsequent researchers to design wave-absorbing materials, and has an essential inspirational value for the optimization research and development of wave-absorbing materials. © 2025

关键词： Dynamic response

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Flexible high-performance microcapacitors enabled by all-printed two-dimensional nanosheets

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Science Bulletin 2022年第24期67卷 2541-2549,M0004页

作者： Pengxiang Zhang Yushui Fu Xin Zhang Xihua Zhang Bao-Wen Li Ce-Wen Nan Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Chemically exfoliated nanosheets have exhibited great potential for applications in various electronic ***-based processing strategies such as inkjet printing provide a low-cost,environmentally friendly,and scalable route for the fabrication of flexible devices based on functional inks of twodimensional *** this study,chemically exfoliated high-k perovskite nanosheets(i.e.,Ca_(2)Nb_(3)O_(10)and Ca_(2)NaNb_(4)O_(13))are well dispersed in appropriate solvents to prepare printable inks,and then,a series of microcapacitors with Ag and graphene electrodes are *** resulting microcapacitors,Ag/Ca_(2)Nb_(3)O_(10)/Ag,graphene/Ca_(2)Nb_(3)O_(10)/graphene,and graphene/Ca_(2)NaNb_(4)O_(13)/graphene,demonstrate high capacitance densities of 20,80,and 150 nF/cm^(2) and high dielectric constants of 26,*** 200,*** dielectric enhancement in the microcapacitors with graphene electrodes is possibly attributed to the dielectric/graphene *** addition,these microcapacitors also exhibit good insulating performance with a moderate electrical breakdown strength of approximately 1 MV/cm,excellent flexibility,and thermal stability up to 200℃.This work demonstrates the potential of high-k perovskite nanosheets for additive manufacturing of flexible high-performance dielectric capacitors.

关键词： High-k perovskite nanosheets Inkjet printing Microcapacitors Dielectric enhancement Interface effect

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Mild photothermal therapy-enhanced nano-ferroptosis inducer for potent treatment of advanced prostate cancer

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Nano Research 2025年第4期18卷 375-387页

作者： Xiao Hu Fei Li Xin-Hang Qian Yu-Sen Zhang Shuai Ke Yun-Xia Jin Shuai Yuan Yuan-Yuan Zhang Rui Li Lei Cao Lang Rao Xian-Tao Zeng Ling-Ling Zhang Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071China Institute of Chemical Biology Shenzhen Bay LaboratoryShenzhen 518132China Department of Urology Zhongnan Hospital of Wuhan UniversityWuhan 430071China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules&College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China Xinjiang Key Laboratory of Solid State Physics and Devices School of Physics Science and TechnologyXinjiang UniversityUrumqi 830017China

Androgen deprivation therapy(ADT)and androgen receptor signaling inhibitors(ARSis)often have limited efficacy in patients with advanced prostate cancer(PCa)(especially AR-negative).Inducing ferroptosis in PCa cells is an attractive therapeutic *** this work,mesoporous polydopamine nanoparticles(MPDA NPs)were developed to simultaneously deliver Cu^(+)/Cu^(2+)ion pairs and glutathione peroxidase 4(GPX4)inhibitor RSL3 to tumor sites for enhanced treatment of *** prepared MPDA-Cu-RSL3@HA(MPCRH)NPs induced ferroptosis by promoting lipid peroxidation and regulating phospholipid profiles in PCa cells,and the above effects were further enhanced by mild photothermal therapy(mPTT)without damaging normal *** can promote reactive oxygen species(ROS)generation and degrade tumor extracellular matrix in vivo to promote nanodrugs intratumoral *** short,this work shows the great application potential of mPTT-enhanced nano-ferroptosis inducers in the field of PCa treatment,in order to provide a reasonable paradigm for nanodrug development and PCa treatment.

关键词： prostate cancer ferroptosis mild photothermal therapy chemodynamic therapy mesoporous polydopamine

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Electrolyte Engineering Toward High-Voltage Aqueous Energy Storage Devices

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Energy & Environmental materials 2021年第3期4卷 302-306页

作者： Jianfeng Tan Jinping Liu School of Chemistry Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China State Center for International Cooperation on Designer Low-carbon&Environmental Materials and School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Aqueous electrochemical energy storage(EES)devices are highly safe,environmentally benign,and inexpensive,but their operating voltage and energy density must be increased if they are to efficiently power multifunctional electronics,new-energy cars as well as to be used in smart *** Minireview summarizes the key breakthroughs and progress in expanding the electrochemical stability window(ESW)of aqueous EES devices over the past five *** briefly introducing the electrode engineering ways to widen ESW,we focus on four ground-breaking electrolyte engineering strategies and classify them into two kinds from the perspective of salts and exotic solutes/*** widening degree toward ESW of these emerging electrolytes is compared and the universal fundamental mechanism relating to the interactions between limited water molecules and high-concentration salts(or large amounts of exotic solutes/solvents)is *** challenges and perspectives for high-ESW electrolytes as well as recent advances in low-cost and other metal ion(sodium,potassium,zinc,etc.)-based electrolytes for expanding ESW are also outlined.

关键词： aqueous energy storage systems electrolyte engineering high voltage high-energy density water electrolysis

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Hot processing map and antibacterial properties of Fe-based medium-entropy alloys

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Rare Metals 2025年 1-20页

作者： Ma, Hu-Wen Zhao, Yan-Chun Su, Yu Jin, Bo Yu, Zhi-Qi Xiang, Jia-Cheng Tang, Fu-Ling Zhan, Fa-Qi Feng, Li Liaw, Peter K. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou 730050 China Wenzhou Pump and Valve Engineering Research Institute Lanzhou University of Technology Wenzhou 325105 China Department of Materials Science and Engineering University of Tennessee Knoxville 37996 TN United States

Bacterial and mycoplasma infections pose a severe hazard to human life and property. These necessitate the development of antibacterial metallic materials that can be produced efficiently in large quantities. In this study, an (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₈₆Cu₁₂Ag₂ medium-entropy alloy (MEA) consisting of in situ FCC1 (austenite) and FCC2 (Cu–Ag-rich) phases was prepared. It displayed a yield strength of 1100 MPa, fracture strength of 1921 MPa, and compressive plasticity of 27% at room temperature. This is attributed to the low stacking fault energy (3.7 mJ m⁻²) inducing strong transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), and lattice distortion. The alloy contained nano- and microscale antibacterial phases. This enabled it to achieve an antimicrobial efficiency higher than 99.9% against E. coli and S. aureus after 6 h of exposure. The hot working efficiency makes it preferable for mass production with critical process parameters. A constitutive model was established using the Arrhenius equation to validate the applicability of the dynamic materials model (DMM). Subsequently, the hot processing map of the medium-entropy alloy was established based on the DMM. The optimal processing parameters were determined as 800 °C with strain rates of 10^–1–10^–2 s⁻¹. The low stacking fault energy ensures that dynamic recrystallization is the primary softening mechanism in the “safe” region. Finally, the density of states (DOS) of the MEA (determined by first-principles calculations) was significantly lower (162.1 eV) than those of Ni and Fe. This indicated a strong high-temperature stability. The DOS increased marginally with an increase in deformation. © Youke Publishing Co., Ltd. 2025.

关键词： Antimicrobial behavior First-principles calculation Medium-entropy alloys processing map

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Enhanced Photocatalytic H_(2)-production Activity of CdS Nanoflower using Single Atom Pt and Graphene Quantum Dot as Dual Cocatalysts

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Chinese Journal of Structural Chemistry 2022年第6期41卷 6-14页

作者： Yi Yang Jinsong Wu Bei Cheng Liuyang Zhang Ahmed Abdullah Al-Ghamdi Swelm Wageh Youji Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research Centre(NRC)Wuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia College of Chemistry and Chemical engineering Jishou UniversityJishouHunan 416000China

Single-atom catalysts have high catalytic activity due to their unique quantum size effects and optimal atom ***,visi-ble-light-responsive photocatalysts were designed by coupling CdS with graphene quantum dots(GQDs)and platinum single atoms(PtSAs).GQDs and PtSAs were successively loaded on ultrathin CdS nanosheets through freeze-drying and in-situ photocatalytic *** synergistic effect between PtSAs and GQDs results in superior photocatalytic activity with a hydrogen production rate of 13488μmol h^(-1)g^(-1)as well as the maximum apparent quantum efficiency(AQE)of 35.5%in lactic acid aqueous solution,which is 62 times higher than that of pristine CdS(213μmol g^(-1)h^(-1)).The energy conversion efficiency is ca.13.05%.As a photosensitizer and an electron reservoir,GQDs can not only extend the light response of CdS to the visible-light region(400-800 nm),but also promotes the separation of photoinduced electron-hole ***,PtSAs,with unique electronic and geometric features,can provide more efficient proton reduction *** finding provides an effective strategy to remarkably improve the photocatalytic H_(2) production performance.

关键词： hierarchical nanostructure single-atom catalysts graphene quantum dots CdS nanosheets hydrogen production

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Capacity Optimization of Hybrid Energy Storage System Based on Hysteresis Energy Management Strategy

Capacity Optimization of Hybrid Energy Storage System Based ...

引用

IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Wenlong Yang Minwang Wang Wenchao Zhu Changjun Xie Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China School of Automation Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

ISBN: (数字)9798350351156

ISBN: (纸本)9798350351163

This study improves the hydrogen energy module of the hydrogen-electric coupling system and proposes a hybrid hydrogen storage system structure based on Proton Exchange Membrane Electrolyzer (PEMEL), Alkaline Electrolyzer (ALKEL), and Proton Exchange Membrane Fuel Cell (PEMFC). Considering component startup and shutdown characteristics, dynamic operation, component degradation, and their impact on system reliability, a novel triple-hysteresis energy management strategy is proposed. The comprehensive optimization objectives include minimizing the Levelized Cost of Energy (LCOE), the Loss of Power Supply Probability (LPSP), and the Wind-Solar Curtailment to Load Energy Ratio (WSCLR). The optimal capacity configuration of the hybrid renewable energy system under the new energy management strategy was determined. The performance of the proposed strategy was analyzed and compared over short-term (1 year) and long-term (20 years) operations. The results indicate that the WSCLR of the ALKEL and PEMEL coupled structure is reduced by 83.3% compared to a single ALKEL system, and the LCOE and WSCLR are reduced by 2.1% and 3.5%, respectively, compared to a single PEMEL system. Compared to traditional energy management strategies, the new energy management strategy can reduce the LCOE, WSCLR, and LPSP by 2.7%, 45.0%, and 79.1%, respectively, over a 20-year long-term operation.

关键词： Protons Renewable energy sources System performance Hydrogen Lithium batteries Resource management Reliability Energy management Optimization Hysteresis

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Permeable carbon fiber based thermoelectric film with exceptional EMI shielding performance and sensor capabilities

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Journal of advanced Ceramics 2024年第8期13卷 1119-1131页

作者： Junjie Zhu Chuan Sun Wanlin Feng Mengran Chen Peng-An Zong Chunlei Wan College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211800China Nationai Innovation Institute of Defense Technology Academy of Military Sciences of the People's Liberation Army of ChinaBeijing 100089China Institute of Nuclear Physics and Chemistry Innovation Research Team for Advanced CeramicsChina Academy of Engineering PhysicsMianyang 621900China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Thermoelectric(TE)technologies offer a promising approach for directly converting skin heat into electricity for wearable *** p-type Sb2Tes and n-type BizTes as top-performing materials at room temperature,their rigid inorganic structure,with ultralow moisture permeability,poses challenges in warm and humid conditions,fostering bacterial growth and potential skin *** address this issue,we developed a cross-linked core-shell structure by electrodepositing Sb_(2)Te_(3)(Bi_(2)Te_(3))onto carbon fiber(CF).This architecture significantly improved the electrical conductivity and the Seebeck coefficient,resulting in a remarkable 300-fold increase in the power factor compared to that of pure *** CF/Sb_(2)Te_(3) and CF/Bi2Te films demonstrated optimal power factors of 450 and 121μW·m^(-1)·K^(-2),***,the fabricated films exhibited outstanding moisture permeability,over 3000 g·m^(-2)·d^(-1),exceptional electromagnetic interference shielding efficiency approaching 93 dB,and versatility as sensors for language assistance and respiratory *** attributes underline their broad applicability,emphasizing their suitability for human health protection in diverse scenarios.

关键词： thermoelectric(TE) carbon fiber(CF) Bi_(2)Te_(3) electrodeposition moisture permeability electromagnetic interference shielding

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Large linear electrostrain of acceptor-donor Co-doped ZnO films

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Journal of materials Science & technology 2022年第14期109卷 12-19页

作者： Chang Gao Yu Zhao Weili Li Yulong Qiao Zhao Wang Lu Jing Jie Sheng Wei-Dong Fei School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Precision Heat Processing of Metals Harbin Institute of TechnologyHarbin 150001China Laboratory for Space Environment and Physical Science Research Center of Basic Space ScienceHarbin Institute of TechnologyHarbin 150001China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

In this paper we present the effective strategy of Fe^(3+)and Li^(+)co-doping to enhance the electrostrain of ZnO thin ***_(0.88)(Fe_(0.06)Li_(0.06))O thin film exhibits an excellent d_(33)^(*)value of 415 pm/V and large linear electrostrain of 0.68%after thermal-electric *** the X-ray diffraction and first principle calculation results have indicated that the Fe^(3+)and Li^(+)ions are inclined to adopt a preferential alignment along the edges approximately parallel to[001]direction in the zinc-oxygen tetrahedron and constitute a defect dipole(ionic pairs).It is considered that the local lattice distortion and the electric field-triggered polarization extension and rotation generated by preferential distributed Fe^(3+)-Li^(+)ionic pairs are responsible for the outstanding piezoelectric properties and large linear electrostrain.

关键词： Zno Piezoelectric Donor-acceptor ionic pairs Local lattice distortion Lead-free

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Long-term Unsupervised Prediction of Proton Exchange Membrane Fuel Cells Considering Voltage Recovery

Long-term Unsupervised Prediction of Proton Exchange Membran...

引用

IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Jiarui Xue Wenchao Zhu Changjun Xie School of Automation Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

ISBN: (数字)9798350351156

ISBN: (纸本)9798350351163

Predicting degradation behavior is both challenging and essential for the prognosis and health management of proton exchange membrane fuel cells (PEMFCs). This paper considers the voltage recovery phenomenon that occurs during the frequent start-stop cycles of PEMFCs and proposes a voltage recovery (VR) model to calculate and predict the value of voltage recovery. FC1 is used as a reference sample with fully known degradation, while FC2 is considered a cell in the degradation process. A Gate Recurrent Unit (GRU) neural network is employed to learn the mapping relationship between FC1 and FC2 and predict the state of health (SOH) of FC2. Finally, the prediction results from the VR model and the GRU neural network are combined to obtain the final prediction outcome. The proposed hybrid method effectively improves prediction performance by combining the local dynamic characteristics predicted by the VR model with the overall degradation trend predicted by the data-driven method, offering both improved accuracy and practical significance.

关键词： Degradation Protons Accuracy Neural networks Fuel cells Predictive models Market research Data models Power electronics Prognostics and health management

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