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Co-activation for enhanced K-ion storage in battery anodes

National science Review 2023年第7期10卷 183-195页

作者： Yanhong Feng Yawei Lv Hongwei Fu Mihir Parekh Apparao M.Rao He Wang Xiaolin Tai Xianhui Yi Yue Lin Jiang Zhou Bingan Lu School of Physics and Electronics Hunan University Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China School of Materials Science and Engineering Central South University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University

The relative natural abundance of potassium and potentially high energy density has established potassium-ion batteries as a promising technology for future large-scale global energy ***,the anodes' low capacity and high dis charge platform lead to low energy density,which impedes their rapid ***,we present a possible co-activation mechanism between bismuth（Bi） and tin（Sn）that enhances K-ion storage in battery *** co-activated Bi-Sn anode delivered a high capacity of634 mAh g-1,with a discharge plateau as low as 0.35 V,and operated continuously for 500 cycles at a current density of 50 mA g-1,with a high Coulombic efficiency of 99.2%.This possible co-activation strategy for high potassium storage may be extended to other Na/Zn/Ca/Mg/Al ion battery technologies,thus providing insights into how to improve their energy storage ability.

关键词： potassium ion batteries anode co-activation high reversible capacity

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Delineation of profoundly birefringent nonlinear photonic crystal fiber in terahertz frequency regime

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Journal of Optical Communications 2025年第1期46卷 41-49页

作者： Yadav, Sapana Singh, Sachin Lohia, Pooja Umar, Ahmad Dwivedi, Dilip Kumar Photonics and Photovoltaic Research Lab Department of Physics and Material Science Madan Mohan Malaviya University of Technology Gorakhpur273010 India Department of Electronics and Communication Engineering Madan Mohan Malaviya University of Technology Gorakhpur273010 India Najran University Najran11001 Saudi Arabia Department of Materials Science and Engineering The Ohio State University Columbus OH43210 United States

The photonic aspects of semiconducting hexagon-shaped photonic crystal fiber including effective mode area, effective mode index, dispersion, and confinement loss, have already been investigated. The finite element method has been used to compute the maximum distribution of the studied photonic crystal fiber by COMSOL software. The linear modifications from both the effective mode index and an effective mode area have been investigated. Dispersion and confinement loss are examined in terms of air hole ring number and wavelength. For every wavelength, the effective-index model implies that the studied fiber can indeed be single mode. Even though its practical single-mode range inside the opacity aperture of silica appears large, it is eventually confined by a bend-loss edge at both brief & medium wavelengths. Moreover, the reported fiber offers minimal confinement loss of almost 10-8 dB/cm, birefringence 0.0012, and dispersion around 10-11 ps/km nm. © 2022 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Birefringence

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Low-Voltage IGZO Field-Effect Ultraviolet Photodiode

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Chinese physics Letters 2024年第6期41卷 156-161,I0001-I0003页

作者：宋双梁会力霍文星张广张永晖王绩伟梅增霞 Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China College of Physics Liaoning UniversityShenyang 110036China Department of Instruments Science and Technology School of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin 300072China National Key Laboratory of Scattering and Radiation Beijing 100039China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

In the era of Internet of Things(Io Ts),an energy-efficient ultraviolet(UV)photodetector(PD)is highly desirable considering the massive usage scenarios such as environmental sterilization,fire alarm and corona discharge *** far,common self-powered UV PDs are mainly based on metal-semiconductor heterostructures or p–n heterojunctions,where the limited intrinsic built-in electric field restricts further enhancement of the *** this work,an extremely low-voltage field-effect UV PD is proposed using a gatedrain shorted amorphous IGZO(a-IGZO)thin film transistor(TFT)architecture.A combined investigation of the experimental measurements and technology computer-aided design(TCAD)simulations suggests that the reverse current(ⅠR)of field-effect diode(FED)is highly related with the threshold voltage(Vth)of the parental TFT,implying an enhancement-mode TFT is preferable to fabricate the field-effect UV PD with low dark *** by a low bias of-0.1 V,decent UV response has been realized including large UV/visible(R_(300)/R_(550))rejection ratio(1.9×10^(3)),low dark current(1.15×10^(-12)A)as well as high photo-to-dark current ratio(PDCR,~10^(3))and responsivity(1.89 A/W).This field-effect photodiode provides a new platform to construct UV PDs with well-balanced photoresponse performance at a low bias,which is attractive for designs of large-scale smart sensor networks with high energy efficiency.

关键词： IGZO attractive ultraviolet

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Graphene-calcium carbonate coating to improve the degradation resistance and mechanical integrity of a biodegradable implant

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Journal of Magnesium and Alloys 2024年第1期12卷 394-404页

作者： Lokesh Choudhary Parama Chakraborty Banerjee R.K.Singh Raman Derrek E.Lobo Christopher D.Easton Mainak Majumder Frank Witte Jörg F.Löffler Department of Mechanical and Aerospace Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia Department of Chemical and Biological Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia Nanoscale Science and Engineering Laboratory(NSEL) Bldg 37Monash UniversityClayton CampusMelbourneVIC 3800Australia CSIRO Materials Science and Engineering Bayview AvenueClaytonVIC 3168Australia Julius Wolff Institute and Berlin Brandenburg Center for Regenerative Therapies Charité–Universitätsmedizin BerlinAugustenburger Platz 113353 BerlinGermany Laboratory of Metal Physics and Technology Department of MaterialsETH Zurich8093 ZurichSwitzerland

Biodegradable implants are critical for regenerative orthopaedic procedures,but they may suffer from too fast corrosion in human-body *** necessitates the synthesis of a suitable coating that may improve the corrosion resistance of these implants without compromising their mechanical *** this study,an AZ91 magnesium alloy,as a representative for a biodegradable Mg implant material,was modified with a thin reduced graphene oxide(RGO)-calcium carbonate(CaCO_(3))composite *** analytical and in-vitro electrochemical characterization reveals that this coating significantly improves the corrosion resistance and mechanical integrity,and thus has the potential to greatly extend the related application field.

关键词： Graphene coating Biodegradable implant Hydroxyapatite Corrosion Magnesium alloy

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Voltage-controlled spin-wave Doppler shift in a ferromagnetic/ferroelectric heterojunction

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Physical Review Applied 2024年第1期22卷 014085-014085页

作者： Shaojie Hu Kang Wang Tai Min Takashi Kimura Department of Physics Center for Spintronics and Quantum Systems State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering School of Materials Science and Intelligent Engineering

Efficient manipulation of spin waves (SWs) is considered as one of the promising means for encoding information with low power consumption in next-generation spintronic devices. The SW Doppler shift is a key phenomenon obtained by manipulating SW propagation. Here, we predict an efficient way to control the SW Doppler shift by voltage-control magnetic-anisotropy-boundary (MAB) movement in the FM-FE heterojunction. From the micromagnetic simulation, we verified that the SW Doppler shift aligns well with our theoretical predictions in Fe/BaTiO3 heterostructure. The SW Doppler shift also shows an ultra-wide-band-shift (over 5 GHz) property with voltage. Such an efficient SW Doppler shift may provide one possible way to measure the Hawking radiation of an analogue black hole in the SW systems.

关键词： Magnetic anisotropy Magnons Multiferroics Spin waves Ferroelectrics Ferromagnets Multiferroic tunnel junctions

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Growth of CySi1-x-ySnx Alloys for Low-Cost High-Efficiency Multi-Junction Solar Cells 52

Growth of CySi1-x-ySnx Alloys for Low-Cost High-Efficiency M...

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52nd IEEE Photovoltaic Specialist Conference, PVSC 2024

作者： Banihashemian, Seyedeh Fahimeh Mahmoudi, Mohammad Mosleh, Aboozar Naseem, Hameed A. University of Arkansas Department of Electrical Engineering FayettevilleAR72701 United States Materials Science & Engineering Program University of Arkansas FayettevilleAR72701 United States

ISBN: (纸本)9781665464260

The future demand for high efficiency solar cell necessitates a breakthrough in development of multi-junction cells. Presently, single junction solar cells dominate the market due to the high production expenses associated with multi-junction variants. This study demonstrates growth and characterization of a new ternary material system of CSiSn that holds promise for fabricating high-efficiency multi-junction solar cells on a Si substrate. © 2024 IEEE.

关键词： Ternary alloys

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Effect of Heat Treatments on Microstructure and Mechanical Properties of Fe-Mn-Ni-Al-Gd Shape Memory Alloy

Effect of Heat Treatments on Microstructure and Mechanical P...

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2023 Sharjah International Conference on physics of Advanced materials, SICPAM 2023

作者： Mustafa, Faisal Egilmez, Mehmet Abuzaid, Wael El-Khatib, Sami Department of Physics American University of Sharjah Sharjah26666 United Arab Emirates Materials Science and Engineering Program American University of Sharjah Sharjah26666 United Arab Emirates Department of Mechanical Engineering American University of Sharjah Sharjah26666 United Arab Emirates

There are significant scientific and industrial efforts to develop and optimize Iron-based shape memory alloys (SMA) such as FeMnNiAl for cost-sensitive applications. This alloy system shows shape memory and superelastic properties across a large temperature range. However, many studies have pointed out the need for rather complex thermo-mechanical treatments for the optimization of the SMA properties. In addition, works considering the effects of alloying on the development of microstructures that are more conducive to pseudo-elasticity in this system remain limited. Hence, systematic studies aiming at the investigation of the microstructural evolution of the FeMnNiAl(Gd) system are of great interest. In this study, solution heat treatment is done to tune the microstructure for optimum mechanical properties. The effect of phase distribution on mechanical properties is investigated at different heat treatments. Whereas cyclic heat treatment induced abnormal grain growth (AGG) in all samples, so large grains were obtained. The phase variation and elemental composition are analyzed by X-ray diffraction and Energy Dispersive Spectroscopy, respectively. The microstructure and phase distribution are observed using Scanning Electron Microscope and then related to the microhardness results. The microstructure has a good correlation with mechanical properties where the fine distribution of phases results in a higher hardness number. © Published under licence by IOP Publishing Ltd.

关键词： Microstructure

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Peroxidase-like single Fe atoms anchored on Ti_(3)C_(2)T_(x)MXene as surface enhanced Raman scattering substrate for the simultaneous discrimination of multiple antioxidants

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Nano Research 2023年第7期16卷 10053-10060页

作者： Hongyan Xi Hongfei Gu Yurui Han Tingting You Pengfei Wu Qingqing Liu Lirong Zheng Shuhu Liu Qiang Fu Wenxing Chen Yukun Gao Yuting Wang Penggang Yin Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemical Physics School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of ScienceBeijing 100029China School of Future Technology University of Science and Technology of ChinaHefei 230026China

Single-atom nanozymes(SAzymes)are emerging as promising alternatives to mimic natural enzyme,which is due to high atomic utilization efficiency,well-defined geometric,and unique electronic ***,Fe single atoms supported on Ti_(3)C_(2)T_(x)(Fe-SA/Ti_(3)C_(2)T_(x))with intrinsic peroxidase activity is developed,further constructing a sensitive Raman sensor array for sensing of five ***-SA/Ti_(3)C_(2)T_(x)shows excellent peroxidase-like performance in catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)with colorimetric reactions.X-ray adsorption fine structure(XAFS)reveals that the electron transport between the Ti_(3)C_(2)T_(x)and Fe atoms occurs along Fe-O-Ti ligands,meanwhile the density functional theory(DFT)calculations confirm the spontaneous dissociation of H_(2)O_(2)and the formation of OH ***,the peroxidase-like Fe-SA/Ti_(3)C_(2)T_(x)was used as surface enhanced Raman scattering(SERS)substrate of oxidized TMB(TMB+)and achieved satisfied signal amplification *** the blocking effects of free radical reactions,one-off identification of 5 antioxidants,including ascorbic acid(AA),uric acid(UA),glutathione(GSH),melatonin(Mel),and tea polyphenols(TPP),could be realized with this high identifiable catalytic *** principle could realize 100%distinguish accuracy combined with linear discriminant analysis(LDA)and heat map data analysis.A wide detection concentration ranges from 10^(-8)to 10^(-3)M for five antioxidants was also achieved.

关键词： single atom catalyst Ti_(3)C_(2)T_(x)MXene atomic interface site surface enhanced Raman scattering(SERS) antioxidants

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Moiré potential renormalization and ultra-flat bands induced by quasiparticle-plasmon coupling

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npj Computational materials 2023年第1期9卷 2279-2285页

作者： Linghan Zhu Haonan Wang Li Yang Department of Physics Washington University in St.LouisSt.LouisMO 63130USA Institute of Materials Science and Engineering Washington University in St.LouisSt.LouisMO 63130USA

Moirépotential profile can form flat electronic bands and manifest correlated states of electrons,where carrier doping is essential for observing those *** this work,we uncover a hidden but remarkable many-electron effect:doped carriers form a two-dimensional plasmon and strongly couple with quasiparticles to renormalize moirépotential and realize ultra-flat *** many-body perturbation theory,we demonstrate this effect in twisted MoS_(2)/WS_(2) *** moirépotential is significantly enhanced upon carrier doping,and the bandwidth is reduced by order of magnitude,leading to drastic quenching of electronic kinetic energy and stronger *** further predict that the competition between correlated mechanisms can be effectively controlled via doping,giving hope to a quantum transition between Mott and charge-transfer insulating *** work reveals that the potential renormalization effect of doping is much more significant in determining and controlling many-electron electronic correlations than sole filling-factor tuning in semiconducting moirécrystals.

关键词： bands doping potential

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Leveraging language representation for materials exploration and discovery

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npj Computational materials 2024年第1期10卷 2622-2635页

作者： Jiaxing Qu Yuxuan Richard Xie Kamil M.Ciesielski Claire E.Porter Eric S.Toberer Elif Ertekin Department of Mechanical Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-ChampaignUrbanaIL 61801USA Department of Physics Colorado School of MinesGoldenCO 80401USA Materials Research Laboratory University of Illinois at Urbana-ChampaignUrbanaIL 61802USA

Data-driven approaches to materials exploration and discovery are building momentum due to emerging advances in machine ***,parsimonious representations of crystals for navigating the vast materials search space remain *** address this limitation,we introduce a materials discovery framework that utilizes natural language embeddings from language models as representations of compositional and structural *** contextual knowledge encoded in these language representations conveys information about material properties and structures,enabling both similarity analysis to recall relevant candidates based on a query material and multi-task learning to share information across related *** this framework to thermoelectrics,we demonstrate diversified recommendations of prototype crystal structures and identify under-studied material *** through first-principles calculations and experiments confirms the potential of the recommended materials as high-performance ***-based frameworks offer versatile and adaptable embedding structures for effective materials exploration and discovery,applicable across diverse material systems.

关键词： contextual utilize versatile

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