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Polyamorphism mediated by nanoscale incipient concentration wave uncovering hidden amorphous intermediate state with ultrahigh modulus in nanostructured metallic glass

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Materials Futures 2023年第2期2卷 123-133页

作者： Qiang Luo Weiran Cui Huaping Zhang Liangliang Li Liliang Shao Mingjuan Cai Zhengguo Zhang Lin Xue Jun Shen Yu Gong Xiaodong Li Maozi Li Baolong Shen School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing 211189People’s Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Institute of Physics Chinese Academy of SciencesBeijing 100190People’s Republic of China Department of Physics Renmin University of ChinaBeijing 100872People’s Republic of China Inner Mongolia University of Science&Technology Baotou 014010People’s Republic of China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China

Comprehending the pressure-/temperature-induced structural transition in glasses,as one of the most fascinating issues in material science,is far from being well ***,we report novel polyamorphic transitions in a Cu-based metallic glass(MG)with apparent nanoscale structural heterogeneity relating to proper Y *** low-density MG compresses continuously with increasing pressure,and then a compression plateau appears after∼8.1 GPa,evolving into an intermediate state with an ultrahigh bulk modulus of∼467 *** then transforms to a high-density MG with significantly decreased structural heterogeneity above∼14.1 ***-dimensional atom probe tomography reveals concentration waves of Cu/Zr elements with an average wavelength of∼5-6 nm,which promote the formation of interconnected ringlike networks composed of Cu-rich and Zr-rich dual-glass domains at nanometer *** experimental and simulation results indicate that steplike polyamorphism may stem from synergic effects of the abnormal compression of the Zr-Zr bond length at the atomic scale and the interplay between the applied pressure and incipient concentration waves(Cu and Zr)at several nanometer *** present work provides new insights into polyamorphism in glasses and contributes to the development of high-performance amorphous materials by high-pressure nanostructure engineering.

关键词： metallic glasses heterogeneity concentration wave polyamorphism

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Ultralow Frequency Interlayer Mode from Suppressed Van Der Waals Coupling in Polar Janus SMoSe/SWSe Heterostructure

SSRN

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SSRN 2025年

作者： Ren, Kai Wang, Ke Luo, Yi Sun, Minglei Altalhi, Tariq Yakobson, Boris I. Zhang, Gang School of Mechanical and Electronic Engineering Nanjing Forestry University Jiangsu Nanjing210037 China School of Automation Xi’an University of Posts & Telecommunications Xi’an710121 China School of Mechanical Engineering Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu Ocean University Lianyungang222005 China Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Chemistry Department Taif University Taif21944 Saudi Arabia Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing314019 China Jiangsu Ocean University China Southeast University China

The broken mirror symmetry in Janus SMoSe and SWSe monolayers induces novel properties for photocatalytic, thermoelectric and photocatalytic devices. Interlayer coupling is critical in van der Waals (vdW) heterostructure for quantum transport and polaritonics. We investigate Janus SMoSe/SWSe vdW heterostructures with three stacking interfaces: S-S, S-Se, and Se-Se. The S-Se SMoSe/SWSe vdW heterostructure with lowest symmetry exhibits ultralow frequencies of in-plane shear (1.94 cm−1) and out-of-plane breathing (4.47 cm−1) modes due to weaker interlayer vdW restoring forces and a significant intrinsic vertical dipole moment. The reduced restoring forces are caused by the critical charge transfer across the vdW interface. Thus, the larger interlayer spacing in the S-Se SMoSe/SWSe heterostructure results in the suppressed vdW interlayer coupling for ultralow phonon frequencies. These findings advance understanding of tuning vdW coupling in polar Janus SMoSe/SWSe heterostructures by stacking engineering, providing theoretical insights for designing tunable nanoelectronic devices. © 2025, The Authors. All rights reserved.

关键词： Van der Waals forces

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Quantitative Pre-Lithiation Modulation of Aluminum Foil Anode Kinetics Enables High Rate and Stable Cycling of High-Loading All-Solid-State Batteries

SSRN

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SSRN 2024年

作者： Fan, Zengjie Ding, Bing Li, Zhiwei Chang, Zhi Wu, Langyuan Hu, Ben Xu, Chong Dou, Hui Zhang, Xiaogang Jiangsu Key Laboratory of Electrochemical Energy-Storage Technologies College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China National Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and Astronautics No. 29 Yudao Street Nanjing210016 China Shenzhen Research Institute Nanjing University of Aeronautics and Astronautics Shenzhen518000 China School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University Hunan Changsha410083 China

Aluminum (Al) foil holds great promise as a pure alloy anode for all-solid-state batteries (ASSBs) due to its suitable potential, high theoretical capacity, and excellent electronic conductivity. However, it remains challenging to achieve high reversibility and stability of the Al foil anode for ASSBs. Herein, we investigate the morphological and lithium (Li) kinetics evolutions of the Al foil anode paired with sulfide solid-state electrolyte (SSE). We identify that the significant reversible capacity loss stems from diminished Li kinetics at low Li contents (LixAl, 0 © 2024, The Authors. All rights reserved.

关键词： Solid-State Batteries

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Quantitative Pre-Lithiation Modulation of Aluminum Foil Anode Kinetics Enables High Rate and Stable Cycling of High-Loading All-Solid-State Batteries

SSRN

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SSRN 2024年

关键词： Lithium

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Image Super Resolution by Double Dictionary Learning and its Application to Tool Wear Monitoring in Micro Milling

SSRN

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SSRN 2023年

作者： Li, Si Lin, Zhihao Zhu, Kunpeng Precision Manufacturing Institute Wuhan University of Science and Technology Hubei Wuhan430081 China Research Center of Advanced Manufacturing Technology Institute of Intelligent Machines Hefei Institutes of Physical Science Chinese Academy of Sciences Jiangsu Changzhou213164 China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Hubei Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Hubei Wuhan430081 China

It is an effective means to improve the machining quality of product by monitoring the tool wear conditions in micro milling. However, due to the small size and high speed of the micro milling cutter, it is difficult to capture the clear image of tool wear by CCD camera. Therefore, a double dictionary sparse coding super-resolution (SR) method is proposed to improve the resolution of micro milling tool wear images in this work. Based on the traditional single dictionary, this work proposes the residual dictionary to reconstruct the residual image of the tool, achieving the double dictionary coefficient encoding reconstruction. In order to extract local features of low resolution (LR) tool wear images, the Gobor filter banks are designed, and then the PCA method is used to reduce dimension of extracted features. The dictionary learning based on a single high resolution (HR) image is realized, which reduces the dependence of super-resolution algorithm on large datasets. The effectiveness of Gabor filter and double dictionary for restoration tool wear image details is verified by experiments. Compared with other conventional SR methods, the results have shown that the proposed method has excellent performance in super-resolution reconstruction of micro milling tool images for tool wear monitoring. © 2023, The Authors. All rights reserved.

关键词： Milling (machining)

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Micro-Pyrolysis Perturbation Promotes Electrocatalytic Activity of Tetranuclear Nickel Clusters

SSRN

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SSRN 2023年

作者： Wang, Lu Li, Li Gan, Meixing Wang, Zheng Li, Tian Wang, Zhao Li, Yuebin Tao, Shi Peng, Xu 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 & Chemical Engineering Hubei University Wuhan430062 China School of Electronic and Information Engineering Jiangsu Laboratory of Advanced Functional Materials Changshu Institute of Technology Changshu215500 China Equine Science Research and Horse Doping Control Laboratory Wuhan Business University Wuhan43005 China

As for the preparation of efficient and stable electrocatalysts containing transition metal heteroatoms by high-temperature pyrolysis is intriguing. However, studies on the pyrolysis of complexes in low-temperature range to obtain efficient catalytic transport platforms are rare. Herein, we propose a micro-pyrolysis perturbation strategy in constructing nickel molecular cluster-based bifunctional electrocatalysts, derived from a case of the tetranuclear Schiff-based nickel molecular cluster Ni4 (Ni4(II)C46H68N4O18) with N, O coordination mode. the crystal structure undergoes mild decomposition of peripheral ligands during the pyrolysis process are revealed by in situ Thermogravimetry-mass spectrometry (TG-MS) and ex situ synchrotron-based X-ray absorption spectroscopy (XAS) technology. Besides, the metal active center inside the nickel molecular cluster Ni-O is able to be exposed on the surface in micro-pyrolysis perturbation rather than being covered or destroyed under traditional high-temperature pyrolysis. The bifunctional catalyst Ni4-350 displays a low overpotential of 247 mV for the OER, and 1.366 V for the UOR at 10 mA·cm-2, which is also stable in alkaline medium for 10 hours of continuous running. This model study highlights that the micro-pyrolysis perturbation strategy can provide stable highly active centers while retaining the host structural framework in Ni-based clusters with promising potential application in low-potential OER/UOR electrocatalysts. © 2023, The Authors. All rights reserved.

关键词： Pyrolysis

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Bio-Based Eutectic Composite Phase Change Materials with Enhanced Thermal Conductivity and Shape Stabilization for Battery Thermal Management

SSRN

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SSRN 2024年

作者： Su, Yanghan Zhou, Fei Shen, Junjie Chen, Xing Xu, Xiaobin Shi, Shaojun Wang, Xiaolin State Key Laboratory of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing210016 China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China Jiangsu Lab of Advanced Functional Material Changshu Institute of Technology Changshu215500 China School of Engineering University of Tasmania HobartTAS7005 Australia

Organic phase change materials (PCMs) are commonly used for battery thermal management. Organic petroleum-based PCMs such as paraffin have an adverse effect on environment. Fatty acids as environmentally friendly bio-based PCMs, have enormous potential in sustainable development strategies. Nevertheless, the application of fatty acids in battery thermal management (BTMS) is restricted by the leakage of liquid PCM, poor thermal performance and the improper phase change temperature. We proposed a novel bio-based eutectic composite phase change materials (CPCM) with enhanced thermal conductivity and excellent shape-stabilization, composed of ethylene-vinyl acetate (EVA), Aluminum nitride (AlN), and the eutectic PCM of Lauric acid (LA) and Stearic acid (SA). Significantly, the screened eutectic PCM of LA-SA possesses a suitable phase change temperature range corresponding to the battery operating temperature, and long-term thermal cycling stability of up to 100 cycles. And the cross-linked structure of EVA effectively encapsulated the eutectic PCM, whose mass only lost below 4% after 24 hours heating at 80 °C. Simultaneously, the introduction of AlN greatly improved the heat transfer ability and mechanical properties. LA-SA/EVA/AlN composites with 5wt% AlN has adequate latent heat of 107.94J/g and high thermal conductivity of 0.726 W/ (m·K). The discharging-charging test was finally performed to evaluate the temperature control ability of CPCM. It suggested that the CPCM incorporated with AlN is capable effective cooling battery and dissipate energy inside PCM rapidly. © 2024, The Authors. All rights reserved.

关键词： Aluminum nitride

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Self-Supervised Plant Phenotyping by Combining Domain Adaptation with 3D Plant Model Simulations: Application to Wheat Leaf Counting at Seedling Stage

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Plant Phenomics 2023年第2期5卷 226-238页

作者： Yinglun Li Xiaohai Zhan Shouyang Liu Hao Lu Ruibo Jiang Wei Guo Scott Chapman Yufeng Ge Benoit de Solan Yanfeng Ding Frédéric Baret Plant Phenomics Research Centre Academy for Advanced Interdisciplinary StudiesJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjingChina Key Laboratory of Image Processing and Intelligent Control School of Artificial Intelligence and AutomationHuazhong University of Science and TechnologyWuhanChina Graduate School of Agricultural and Life Sciences The University of Tokyo1-1-1 Midori-choNishitokyo CityTokyoJapan School of Agriculture and Food Sciences The University of QueenslandSt.LuciaQueensland 4072Australia Department of Biological Systems Engineering University of Nebraska-LincolnLincolnNebraska 68583United States INRAE Avignon UniversitéUMR EMMAHUMT CAPTE228route de l’aérodrome-CS 4050984914 Avignon Cedex 9France ARVALIS Institut du Végétal 3 Rue Joseph et Marie Hackin75116 ParisFrance

The number of leaves at a given time is important to characterize plant growth and *** this work,we developed a high-throughput method to count the number of leaves by detecting leaf tips in RGB *** digital plant phenotyping platform was used to simulate a large and diverse dataset of RGB images and corresponding leaf tip labels of wheat plants at seedling stages(150,000 images with over 2 million labels).The realism of the images was then improved using domain adaptation methods before training deep learning *** results demonstrate the efficiency of the proposed method evaluated on a diverse test dataset,collecting measurements from 5 countries obtained under different environments,growth stages,and lighting conditions with different cameras(450 images with over 2,162 labels).Among the 6 combinations of deep learning models and domain adaptation techniques,the Faster-RCNN model with cycle-consistent generative adversarial network adaptation technique provided the best performance(R^(2)=0.94,root mean square error=8.7).Complementary studies show that it is essential to simulate images with sufficient realism(background,leaf texture,and lighting conditions)before applying domain adaptation ***,the spatial resolution should be better than 0.6 mm per pixel to identify leaf *** method is claimed to be self-supervised since no manual labeling is required for model *** self-supervised phenotyping approach developed here offers great potential for addressing a wide range of plant phenotyping *** trained networks are available at https://***/YinglunLi/Wheat-leaf-tip-detection.

关键词： Wheat seedling Plant

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Layer-dependent electromechanical response in twisted graphene moiré superlattices

arXiv

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arXiv 2024年

作者： Zhang, Hanhao Wei, Yuanhao Li, Yuhao Lin, Shengsheng Wang, Jiarui Taniguchi, Takashi Watanabe, Kenji Li, Jiangyu Shi, Yi Wang, Xinran Shi, Yan Fei, Zaiyao National Laboratory of Solid-State Microstructures School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Nanjing210093 China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Jiangsu Nanjing210016 China National Key Laboratory of Spintronics Nanjing University Suzhou215163 China Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices Department of Materials Science and Engineering Southern University of Science and Technology Guangdong Shenzhen518055 China School of Integrated Circuits Nanjing University Jiangsu Suzhou215163 China Suzhou Laboratory Jiangsu Suzhou215123 China

The coupling of mechanical deformation and electrical stimuli at the nanoscale has been a subject of intense investigation in the realm of materials science. Recently, twisted van der Waals (vdW) materials have emerged as a platform for exploring exotic quantum states. These states are intimately tied to the formation of moiré superlattices, which can be visualized directly exploiting the electromechanical response. However, the origin of the response, even in twisted bilayer graphene (tBLG), remains unsettled. Here, employing lateral piezoresponse force microscopy (LPFM), we investigate the electromechanical responses of marginally twisted graphene moiré superlattices with different layer thicknesses. We observe distinct LPFM amplitudes and spatial profiles in tBLG and twisted monolayer-bilayer graphene (tMBG), exhibiting effective in-plane piezoelectric coefficients of 0.05 pm/V and 0.35 pm/V, respectively. Force tuning experiments further underscore a marked divergence in their responses. The contrasting behaviors suggest different electromechanical couplings in tBLG and tMBG. In tBLG, the response near the domain walls is attributed to the flexoelectric effect, while in tMBG, the behaviors can be comprehended within the context of piezoelectric effect. Our results not only provide insights into electromechanical and corporative effects in twisted vdW materials with different stacking symmetries, but may also offer a way to engineer them at the nanoscale. © 2024, CC BY.

关键词： Monolayers

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Significantly Improved Combustion of Ammonia- a Non-Carbon Fuel with Ni-Modified Fe-Based Catalyst

SSRN

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SSRN 2023年

作者： Wu, Ye Zhu, Hang Mei, Jian Zou, Longzhi Yang, Kaixuan Xiong, Chuhao Han, Yinghui Fan, Maohong Liu, Dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power Engineering Nanjing University of Science & Technology Jiangsu210094 China Advanced Combustion Laboratory School of Energy and Power Engineering Nanjing University of Science and Technology Jiangsu Nanjing210094 China College of Resources and Environment University of Chinese Academy of Sciences Beijing100049 China Departments of Chemical and Petroleum Engineering University of Wyoming University Avenue LaramieWY82071 United States

The Ni lattice-doped Fe2O3 catalyst was found to be a cost-effective and environmentally friendly catalyst for catalytic ammonia (NH3) combustion. The flame is stable with high combustion temperature, and the NOx emission was significantly reduced by 39.6%-72.5%, resulting from the decrease in the reduction of energy barrier of N2 formation according to density-functional theory (DFT) calculations. © 2023, The Authors. All rights reserved.

关键词： Catalysts

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