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Recent advances in wave energy converters based on nonlinear stiffness mechanisms

Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 1081-1108页

作者： Xiantao ZHANG Haicheng ZHANG Xiao ZHOU Ze SUN State Key Laboratory of Ocean engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Mechanical and Vehicle engineering Hunan UniversityChangsha 410082China China Ship Scientific research center Wuxi 214082Jiangsu ProvinceChina

Wave energy is one of the most abundant renewable clean energy sources,and has been widely studied because of its advantages of continuity and low seasonal ***,its low capture efficiency and narrow capture frequency bandwidth are still technical bottlenecks that restrict the commercial application of wave energy converters(WECs).In recent years,using a nonlinear stiffness mechanism(NSM)for passive control has provided a new way to solve these technical *** literature review focuses on the research performed on the use of nonlinear mechanisms in wave energy device utilization,including the conceptual design of a mechanism,hydrodynamic models,dynamic characteristics,response mechanisms,and some examples of experimental ***,future research directions are discussed and recommended.

关键词： wave energy efficiency nonlinear stiffness hydrodynamics bistable

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Applications of nanogenerators for biomedical engineering and healthcare systems

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InfoMat 2022年第2期4卷 53-109页

作者： Wanli Wang Jinbo Pang Jie Su Fujiang Li Qiang Li Xiaoxiong Wang Jingang Wang Bergoi Ibarlucea Xiaoyan Liu Yufen Li Weijia Zhou Kai Wang Qingfang Han Lei Liu Ruohan Zang Mark HRümmeli Yang Li Hong Liu Han Hu Gianaurelio Cuniberti College of Electrical engineering Qingdao UniversityQingdaoChina Collaborative Innovation center of technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinanChina College of Electronic Information Qingdao UniversityQingdaoChina Department of Pediatric Surgery The Affiliated Hospital of Qingdao UniversityQingdaoChina College of Physics Qingdao UniversityQingdaoChina Institute for Materials Science and Max Bergmann center of biomaterials Technische Universität DresdenDresdenGermany center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany College of Biological Science and technology University of JinanJinanChina School of Chemistry and Chemical engineering University of JinanShandongJinanChina College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouChina Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouChina Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland Institute for Complex Materials IFW DresdenDresdenGermany Institute of Environmental technology VŠB-Technical University of OstravaOstravaCzech Republic School of Information Science and engineering University of JinanJinanChina Shandong provincial Key Laboratory of Network Based Intelligent Computing University of JinanJinanChina State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinanChina College of Chemical engineering China University of Petroleum(East China)QingdaoChina Dresden center for Computational Materials Science Technische Universität DresdenDresdenGermany The Dresden center for Intelligent Materials(DCIM) Technische Universität DresdenDresdenGermany

The dream of human beings for long living has stimulated the rapid development of biomedical and healthcare ***,conventional biomedical and healthcare devices have shortcomings such as short service life,large equipment size,and high potential safety ***,the power supply for conventional implantable device remains predominantly *** emerging nanogenerators,which harvest micro/nanomechanical energy and thermal energy from human beings and convert into electrical energy,provide an ideal solution for self-powering of biomedical *** combination of nanogenerators and biomedicine has been accelerating the development of self-powered biomedical *** article first introduces the operating principle of nanogenerators and then reviews the progress of nanogenerators in biomedical applications,including power supply,smart sensing,and effective ***,the microbial disinfection and biodegradation performances of nanogenerators have been ***,the protection devices have been discussed such as face mask with air filtering function together with real-time monitoring of human health from the respiration and heat ***,the nanogenerator devices have been categorized by the types of mechanical energy from human beings,such as the body movement,tissue and organ activities,energy from chemical reactions,and gravitational potential ***,the challenges and future opportunities in the applications of nanogenerators are delivered in the conclusive remarks.

关键词： biomedical engineering healthcare implantable devices nanogenerators self-powered devices sensors

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High-performance electronics and optoelectronics of monolayer tungsten diselenide full film from pre-seeding strategy

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InfoMat 2021年第12期3卷 1455-1469页

作者： Shu Zhang Jinbo Pang Qilin Cheng Feng Yang Yu Chen Yu Liu Yufen Li Thomas Gemming Xiaoyan Liu Bergoi Ibarlucea Jiali Yang Hong Liu Weijia Zhou Gianaurelio Cuniberti Mark H.Rümmeli Collaborative Innovation center of technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinanChina School of Chemistry and Chemical engineering University of JinanJinanChina Department of Chemistry Southern University of Science and TechnologyShenzhenChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouChina Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouChina Institute for Complex Materials Leibniz Institute for Solid State and Materials Research DresdenDresdenGermany Institute for Materials Science and Max Bergmann center of biomaterials Technische Universität DresdenDresdenGermany center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinanChina Dresden center for Computational Materials Science Technische Universität DresdenDresdenGermany Dresden center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresdenGermany Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland Institute for Complex Materials IFW DresdenDresdenGermany Institute of Environmental technology(CEET) VŠB-Technical University of OstravaOstravaCzech Republi

Tungsten diselenide (WSe2) possesses extraordinary electronic properties forapplications in electronics, optoelectronics, and emerging exciton physics. Thesynthesis of monolayer WSe2 film is of topmost for device arrays and integratedcircuits. The monolayer WSe2 film has yet been reported by thermal chemicalvapor deposition (CVD) approach, and the nucleation mechanism remainsunclear. Here, we report a pre-seeding strategy for finely regulating the nucleidensity at an early stage and achieving a fully covered film after chemicalvapor deposition growth. The underlying mechanism is heterogeneous nucle-ation from the pre-seeding tungsten oxide nanoparticles. At first, we optimized the precursor concentration for pre-seeding. Besides, we confirmed the superi-ority of the pre-seeding method, compared with three types of substrate pre-treatments, including nontreatment, sonication in an organic solvent, andoxygen plasma. Eventually, the high-quality synthetic WSe2 monolayer filmexhibits excellent device performance in field-effect transistors and photodetec-tors. We extracted thermodynamic activation energy from the nucleation andgrowth data. Our results may shed light on the wafer-scale production ofhomogeneous monolayer films of WSe2, other 2D materials, and their van derWaals heterostructures.

关键词： activation energy chemical vapor deposition field-effect transistor pre-seeding thermodynamics tungsten diselenide

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