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A soft magnetoelectric finger for robots’multidirectional tactile perception in non-visual recognition environments

npj Flexible Electronics 2024年第1期8卷 938-948页

作者： Yizhuo Xu Shanfei Zhang Shuya Li Zhenhua Wu Yike Li Zhuofan Li Xiaojun Chen Congcan Shi Peng Chen Pengyu Zhang Michael D.Dickey Bin Su State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074 HubeiP.R.China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074 HubeiP.R.China Department of Chemical and Biomolecular Engineering North Carolina State UniversityRaleighNC 27695USA

Robotic fingers with multidirectional tactile perception are of great importance for the robotic exploration of complex unknown space,especially in environments in which visualization is not ***,most existing tactile sensors for robotic fingers cannot detect multidirectional forces,which greatly limits their potential for further development in navigating complex ***,we demonstrate a soft magnetoelectric finger(SMF)that can achieve self-generated-signal and multidirectional tactile *** SMF is composed of two parts:a‘finger’covered with a skin-like flexible sheath containing five liquid metal(LM)coils and a‘phalangeal bone’containing a *** to the changes in magnetic flux through the LM coils caused by external forces,diverse induced voltages are generated and collected in real-time,which can be explained by Maxwell’s numerical *** the analysis of the signals generated by the five LM coils,the SMF can detect forces in varied directions and distinguish 6 different common objects with varied Young’s moduli with an accuracy of 97.46%.These capabilities make the SMF suitable for complex unknown space exploration tasks,as proved by the black box *** SMF can enable the development of self-generated-signal and multidirectional tactile perception for future robots.

关键词： environments magneto perception

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Smartly tuning supramolecular chirality in polymer gels via photoexcitation-induced cooperative self-assembly

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science China Chemistry 2025年第3期68卷 1126-1135页

作者： Bingbing Yue Yulong Shi Fan Yang Danfeng Ye Jian Jin Pilan Zhang Shen Song Yifei Xu Hui Lin Shihui Zhu Liangliang Zhu School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China College of Material Science and Chemical Engineering Ningbo University of TechnologyNingbo 315211China Shanghai Depeac Biotechnology Co. Ltd.Shanghai 201900China Burn and Plastic Surgery Department Children’s Medical Center Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200120China

Although supramolecular chirality tuning is prosperous in systems with small molecular building blocks,these systems lack structural strength and have limited practical ***,polymer systems do not exhibit these drawbacks but suffer from topological chain entanglement,which often leads to large dynamic obstacles and therefore limits the tunability of supramolecular ***,we report that by manipulating stoichiometry and employing light to alter the H-bond crosslinking between a photoexcitation-induced aggregatable molecule and high molecular weight poly(L-lactic acids),supramolecular chirality tuning of the polymer gel systems can be achieved in different ways through a cooperative ***,the Cotton effects of the examined systems can be negatively tuned by varying their stoichiometry,while positive tuning can be realized by *** deexcitation,negative Cotton effect tuning occurs again spontaneously in some *** supramolecular chirality tuning is accompanied by rheological property tuning,demonstrating that our strategy can overcome polymer chain entanglement *** proposed strategy inspires further works on the precise control of polymer chirality and,hence,development of asymmetric materials with changeable optical activity and modulus.

关键词： supramolecular chirality polymer gels phototuning self-assembly rheological property

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Silver bismuth sulfide quantum dot-based bioelectronics for light-mediated neuronal stimulation

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ACTA OPHTHALMOLOGICA 2025年第S284期103卷

作者： Kaleli, Humeyra Nur Balamur, Ridvan Kaya, Tarik Safa Onal, Asim Pehlivan, Cigdem Sahin, Afsun Nizamoglu, Sedat Hasanreisoglu, Murat Koc University Research Center for Translational Medicine Istanbul Turkey Department of Electrical and Electronics Engineering Koc University Istanbul Turkey Department of Material Science and Engineering Koc University Istanbul Turkey Department of Biomedical Science and Engineering Koc University Istanbul Turkey Department of Ophthalmology School of Medicine Koc University Istanbul Turkey

Aims/Purpose: Nanomaterial based bioelectronics have been effectively developed as optoelectronic bio-interfaces for neural stimulation and can be fabricated from diverse substances to adapt to cellular environments. In this study, we employed silver bismuth sulfide (AgBiS2) quantum dot (QD)-based neural interfaces stimulated by near-infrared light. Methods: Primary neuron isolation and culture on AgBiS2 QD based photovoltaic device and indium tin oxide (ITO) control device was performed. Cell viability was assessed by CTG, MTT, Live/Dead assay and LDH leakage assays. Cellular stress with light stimulation was assessed by measuring intracellular reactive oxygen species. Cell specific biomarkers, NeuN, beta-III Tubulin and F-actin, were examined by immunofluorescence staining to demonstrate short- and long-term morphological changes and neural network improvements. Number of neuron count and neurite length measurement were analyzed to compare groups. Under light stimulation (λ = 780 nm), neural dynamics and electrophysiological activity were examined through intracellular calcium flow and patch clamp. Results: Throughout the 14-day culture period, neurons remained healthy and viable, preserving their characteristics and forming extensive networks with neurite outgrowth on both the device and ITO. Light stimulation was found to have no adverse effects on viability or intracellular stress levels. The device demonstrated successful photostimulation of neurons with calcium release and generating action potential under 780 nm light illumination which is validating its potential to be used as optoelectronic bio-interfaces for neural applications. Conclusions: Our study holds high potential for the development of QD-based retinal prosthesis, enabling near infrared light-controlled activation in vision related diseases. Funding Information: This study was funded by the European Union (ERC, MESHOPTO, 101045289). References Balamur R, Oh JT, Karatum O, Wang Y, Onal A, Kaleli H

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Covalence bridge atomically precise metal nanocluster and metalorganic frameworks for enhanced photostability and photocatalysis

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Nano Research 2023年第1期16卷 1527-1532页

作者： Aimin Yao Yuanxin Du Meng Han Yan Wang Jiashen Hu Qingtao Zhu Hongting Sheng Manzhou Zhu Department of Materials Science and Engineering Centre for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui UniversityHefei 230601China

Metal nanoclusters(NCs)with precise structure and ultrasmall size have attracted great interests in ***,the poor stability has limited its large-scale ***,we proposed the“covalence bridge”strategy to effectively connect atomically precise metal NCs and metal-organic *** from the covalent linkage,the synthesized UiO-66-NH2-Au25(LCys)18 showed outstanding stability after 16 h ***,the covalence bridge created a strong metal-support interaction between the two components and provided an effective charge transport channel and thereby enhanced photocatalytic ***-66-NH2-Au25(L-Cys)18 displayed an exceptional photocatalytic H2 production rate,which is 21 and 90 times higher than that of UiO-66-NH2/Au25(PET)18(made by physically combination)and bare UiO-66-NH2,*** and kinetic studies demonstrated that UiO-66-NH2-Au25(L-Cys)18 exhibited higher charge transfer efficiency,lower overpotential of water reduction and activation energy barrier compared with its counterparts.

关键词： atomically precise nanoclusters metal-organic frameworks covalent binding photostability photocatalytic hydrogen production

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Low-velocity Impact Behavior of Sandwich Panels with Different Core Configurations: Numerical Study 50

Low-velocity Impact Behavior of Sandwich Panels with Differe...

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50th International Conference on Computers and Industrial engineering: Sustainable Digital Transformation, CIE 2023

作者： Charkaoui, Assil Hassan, Noha M. Bahroun, Zied Material Science and Engineering Program American University of Sharjah Sharjah United Arab Emirates Department of Industrial Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781713886952

Sandwich panels with cellular cores are increasingly prominent in several industries like marine, aerospace, and automotive, owing to their exceptional stiffness and strength-toweight ratio. Their adaptability is further enhanced by the ability to tailor properties such as size, volume fraction, and unit cell geometry. This research investigates the response of sandwich panels to low-velocity impacts, focusing on two distinct core designs: rhombic and I-shaped unit cells, each with a core volume fraction of 15%. It also examines how the impact behaviour is influenced by varying the number of unit cells. The study employs finite element analysis using ABAQUS software to determine the energy absorption capacity and plastic strain in these panels. Findings reveal that changes in the unit cell configuration and number of unit cells significantly alter the panels' energy absorption characteristics. This approach of using numerical simulations offers a cost-effective alternative to extensive experimental testing, enabling the evaluation of various topologies and structures. © 2023 Computers and Industrial engineering. All rights reserved.

关键词： Finite element method

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Compact solar-powered plasma water generator: enhanced on-site aged seed germination with the corona dielectric barrier discharger

Compact solar-powered plasma water generator: enhanced on-si...

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2024 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2024

作者： Xiao, Yiting Tian, Yang Xiong, Haizheng Shi, Ainong Zhu, Jun Biological Engineering University of Arkansas Fayetteville72701 United States Program of Material Science and Engineering University of Arkansas Fayetteville72701 United States Department of Horticulture University of Arkansas Fayetteville72701 United States

ISBN: (纸本)9798331302214

Seed aging adversely affects agricultural productivity by reducing germination rates and seedling vigor, leading to significant costs for seed banks and companies due to the need for frequent seed renewals. This study demonstrates the use of plasma-activated water (PAW), generated by a solar-powered corona dielectric barrier discharger, to enhance germination rates in 23-year-old frozen stored spinach seeds. Treating seeds (strain 08-415) with PAW at 17kV for 15 minutes improved germination by 135% compared to untreated seeds and notably fostered early seedling growth. Through detailed analysis, beneficial PAW properties for seed development were identified, and a mechanism at the molecular level explaining the rejuvenation effects on aged seeds was proposed. This solar-powered micro-reactor represents a significant advancement in seed treatment technology, offering a sustainable solution to meet growing food demands while addressing environmental and resource sustainability challenges. © 2024 ASABE Annual International Meeting. All rights reserved.

关键词： Dielectric barrier discharge

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Improvement of the conversion efficiency of Mg_(3)Sb_(2)thermoelectric devices through optimizing the resistivity of the MgSbNi barrier layer

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Journal of materials science & Technology 2024年第1期168卷 208-214页

作者： Huimin Zhang Yachao Wang Zuhair A.Munir Yongzhong Zhang Wenhao Fan Shaoping Chen College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024China Capital Aerospace Machinery Company Beijing100076China Department of Material Science and Engineering University of CaliforniaDavisCalifornia95616United States of America College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan030024China Instrumental Analysis Center of Taiyuan University of Technology Taiyuan030024China

Mg_(3)Sb_(2)-based thermoelectric materials have been the focus of widespread investigations as promising candidates for the harvesting of waste *** stability and service performance are key points for the commercial applications of these *** utilized Mg_(4.3)Sb_(3)Ni as a barrier layer to improve the thermal stability of Mg 3 Sb 2-based ***,its intrinsic high resistivity contributed nega-tively to the desired performance of the *** this work,we investigated two other Mg-Sb-Ni ternary phases,MgSbNi and MgSbNi_(2),as new barrier layer materials to connect with Mg_(3.2)Sb_(2)Y_(0.05).The results show that the efficiency of the Mg_(1.2)SbNi/Mg_(3.2)Sb_(2)Y_(0.05)/Mg_(1.2)SbNi joint is increased by 33%relative to the higher Mg-content barriers due to lower *** system exhibited good interfacial compatibility and showed little change with aging at 673 K for 20 days.

关键词： Mg_(3)Sb_(2) Mg_(1.2)SbNi Barrier layer Conversion efficiency

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ENHANCING IMPACT RESISTANCE AND VIBRATION PERFORMANCE OF COMPOSITE SANDWICH PANELS USING SHAPE MEMORY ALLOYS: A LITERATURE REVIEW AND IDENTIFICATION OF RESEARCH GAPS 50

ENHANCING IMPACT RESISTANCE AND VIBRATION PERFORMANCE OF COM...

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50th International Conference on Computers and Industrial engineering: Sustainable Digital Transformation, CIE 2023

作者： Thomas, K.K. Hassan, N.M. Bahroun, Z. Material Science and Engineering Program American University of Sharjah Sharjah United Arab Emirates Department of Industrial Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781713886952

Composite sandwich panels are widely used in aeros pace and civil applications due to their lightweight nature, strength, stiffness, corrosion resistance, and sound insulation properties. However, these panels often lack sufficient resistance to impact damage, resulting in reduced mechanical performance. Shape memory alloys (SMAs) have shown potential in improving the impact resistance of composite sandwich panels. SMAs can dissipate energy through phase transformations, leading to hysteresis loops in stress -strain diagrams during structural vibrations and impact loading. This paper presents a literature review of the use of SMAs in composite sandwich panels, focusing on their impact resistance and vibration performance. Various studies on incorporating SMA in composite panels have been analyzed, considering factors such as natural vibration, buckling behavior, impact resistance, energy absorption, and fracture behavior. The findings demonstrate that SMA can enhance the performance of composite sandwich panels, leading to improved impact resistance, reduced d eflection, increased contact forces, and enhanced energy absorption. However, the optimal configuration and parameters of SMA reinforcement in composite panels require further investigation. The review highlights current research trends and identifies gaps that can be addressed for further improvement in composite sandwich panels' performance. © 2023 Computers and Industrial engineering. All rights reserved.

关键词： Stress-strain curves

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Ni_(3)Fe/Ni_(4)S_(3)/Ni/C Mixed Crystal Composite Nanofibers Prepared by Electrospinning and Heat Treatment Methods for Oxygen Evolution Reaction

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Journal of Wuhan University of Technology(materials science) 2023年第2期38卷 267-273页

作者： LI Tao ZHONG Shujie LOU Qiongyue LING Shuai CHEN Jian MA Guohua YANG Mao WU Xiaoqiang Department of Materials Engineering School of Mechanical EngineeringChengdu UniversityChengdu610106China Material Corrosion and Protection Key Laboratory of Sichuan Province Zigong643000China Analysis and Testing Center Southwest University of Science and TechnologyMianyang621010China

OER catalyst of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C(NiFeSC series)mixed crystal composite nanofibers was prepared by electrospinning and atmospheric heat treatment *** testing results indicate that the diameters of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C composite nanofibers is about 200 nm,the grains size is about 1-3 nm,and the fiber surface is *** electrochemical test results show that the heterojunction of the prepared Ni_(3)Fe/Ni_(4)S_(3)/Ni/C hybrid crystal composite nanofiber has synergistic effect with sulfide,and exhibits good electrocatalytic activity of water decomposition and OER in alkaline *** OER electrocatalytic performance of Ni_(3)Fe/Ni_(4)S_(3)/Ni/C composite electrode prepared via a heat treatment at 1000℃process was tested in 1 mol/L KOH *** results show that the overpotential is about 298 mV,the Tafel slope is about 74 mV?dec-1,and the surface resistance is about 1.69Ω·cm^(2),at the current density of 10 mA·cm^(-2).

关键词： mixed crystal composite material nanofiber NiFeSC oxygen evolution reaction(OER)

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Erratum to:Efficient flexible perovskite solar cells and modules using a stable SnO_(2)-nanocrystal isopropanol dispersion

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Nano Research 2024年第4期17卷 4641-4642页

作者： Zhiwei Su Jing Li Ruixuan Jiang Shujie Zhang Chengkai Jin Feng Ye Bingcan Ke Mengjun Zhou Jinhui Tong Hyesung Park Fuzhi Huang Yi-Bing Cheng Tongle Bu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Material Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringGraduate School of Carbon NerutralityLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratry Foshan 528200China

Erratum to Nano Research,2024,17(4):2704-2711 https://***/10.1007/s12274-023-6115-y(1)In the article,the table of contents(TOC)image was unfortunately mispresented.

关键词： perovskite dispersion modules

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