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Recent Advances in Triboelectric Nanogenerators: From Technological Progress to Commercial Applications

ACS Nano 2023年第12期17卷 11087-11219页

作者： Choi, Dongwhi Lee, Younghoon Lin, Zong-Hong Cho, Sumin Kim, Miso Ao, Chi Kit Soh, Siowling Sohn, Changwan Jeong, Chang Kyu Lee, Jeongwan Lee, Minbaek Lee, Seungah Ryu, Jungho Parashar, Parag Cho, Yujang Ahn, Jaewan Kim, Il-Doo Jiang, Feng Lee, Pooi See Khandelwal, Gaurav Kim, Sang-Jae Kim, Hyun Soo Song, Hyun-Cheol Kim, Minje Nah, Junghyo Kim, Wook Menge, Habtamu Gebeyehu Park, Yong Tae Xu, Wei Hao, Jianhua Park, Hyosik Lee, Ju-Hyuck Lee, Dong-Min Kim, Sang-Woo Park, Ji Young Zhang, Haixia Zi, Yunlong Guo, Ru Cheng, Jia Yang, Ze Xie, Yannan Lee, Sangmin Chung, Jihoon Oh, Il-Kwon Kim, Ji-Seok Cheng, Tinghai Gao, Qi Cheng, Gang Gu, Guangqin Shim, Minseob Jung, Jeehoon Yun, Changwoo Zhang, Chi Liu, Guoxu Chen, Yufeng Kim, Suhan Chen, Xiangyu Hu, Jun Pu, Xiong Guo, Zi Hao Wang, Xudong Chen, Jun Xiao, Xiao Xie, Xing Jarin, Mourin Zhang, Hulin Lai, Ying-Chih He, Tianyiyi Kim, Hakjeong Park, Inkyu Ahn, Junseong Huynh, Nghia Dinh Yang, Ya Wang, Zhong Lin Baik, Jeong Min Choi, Dukhyun Kyung Hee University Gyeonggi Yongin17104 Korea Republic of Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Department of Mechanical Engineering Soft Robotics Research Center Seoul National University Seoul08826 Korea Republic of Department of Mechanical Engineering Gachon University Seongnam13120 Korea Republic of Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon16419 Korea Republic of Sungkyunkwan University 2066 Seobu-ro Gyeonggi Suwon16419 Korea Republic of Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 117585 Singapore Division of Advanced Materials Engineering Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Department of Physics Inha University 100 Inha-ro Incheon22212 Korea Republic of School of Materials Science & Engineering Yeungnam University Gyeongbuk Gyeongsan38541 Korea Republic of 291 Daehak-ro Daejeon34141 Korea Republic of School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Institute of Flexible Electronics Technology of Tsinghua Zhejiang Jiaxing314000 China Nanomaterials and System Lab Major of Mechatronics Engineering Faculty of Applied Energy System Jeju National University Jeju632-43 Korea Republic of School of Engineering University of Glasgow GlasgowG128QQ United Kingdom Seoul02792 Korea Republic of Department of Physics Inha University Incheon22212 Korea Republic of Suwon16419 Korea Republic of Department of

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will serve as a key solution in the near future. Among them, triboelectric nanogenerators (TENGs), which is one of the most promising mechanical energy harvesters by means of contact electrification phenomenon, are explosively developing due to abundant wasting mechanical energy sources and a number of superior advantages in a wide availability and selection of materials, relatively simple device configurations, and low-cost processing. Significant experimental and theoretical efforts have been achieved toward understanding fundamental behaviors and a wide range of demonstrations since its report in 2012. As a result, considerable technological advancement has been exhibited and it advances the timeline of achievement in the proposed roadmap. Now, the technology has reached the stage of prototype development with verification of performance beyond the lab scale environment toward its commercialization. In this review, distinguished authors in the world worked together to summarize the state of the art in theory, materials, devices, systems, circuits, and applications in TENG fields. The great research achievements of researchers in this field around the world over the past decade are expected to play a major role in coming to fruition of unexpectedly accelerated technological advances over the next decade. © 2023 The Authors. Published by American Chemical Society

关键词： Nanogenerators

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A Generalized Density Dissipation for Weakly-Compressible Sph

SSRN

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SSRN 2023年

作者： Zheng, Bo Xue Cai, Zhi Wen Zhao, Pei Dong Xu, Xiao Yang Chan, Tak Shing Yu, Peng Department of Mathematics University of Oslo Oslo0851 Norway Guangdong Provincial Key Laboratory of Turbulence Research and Applications Department of Mechanics and Aerospace Engineering Southern University of Science and Technology Shenzhen518055 China China Ship Scientific Research Center Wuxi214082 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China School of Naval Architecture and Ocean Engineering Dalian University of Technology Dalian116024 China School of Computer Science and Technology Xi’an University of Science and Technology Xian710054 China Center for Complex Flows and Soft Matter Research Southern University of Science and Technology Shenzhen518055 China

Weakly compressible Smoothed Particle Hydrodynamics (SPH) is known to suffer from numerical pressure noise, which can significantly undermine simulation stability and accuracy. In response, this study introduces a novel density dissipation scheme aimed at suppressing such unphysical noise. The proposed scheme overcomes the limitations of conventional density dissipation schemes, which are ineffective at fluid interfaces in multiphase flow simulations. As a result, the novel scheme is generally applicable to the entire computational domain, encompassing both single-phase flow and multiphase flow. This advancement is achieved through two key components. Firstly, the traditional density dissipation is replaced with a density increment dissipation approach that enables dissipation to cross interfaces separating different fluids. Secondly, based on dissipation volume conservation, we employ a dissipation volume correction factor (VCF) to stabilize simulations characterized by large density ratios. We demonstrate the accuracy, stability, and robustness of our method through four three-dimensional benchmarks: sloshing under external excitations, the rising of single and double bubbles, Rayleigh-Taylor instability, and Kelvin-Helmholtz instability. Additionally, this study reveals the relationship between SPH utilizing density dissipation and the approximate Riemann solver. © 2023, The Authors. All rights reserved.

关键词： Multiphase flow

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Opposing Effects of Multivalent Ions on the Flexibility of DNA and RNA

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Physical Review Letters 2016年第2期117卷 028101-028101页

作者： Aleksander V. Drozdetski Igor S. Tolokh Lois Pollack Nathan Baker Alexey V. Onufriev Department of Physics Virginia Tech Blacksburg Virginia 24061 USA Department of Computer Science Virginia Tech Blacksburg Virginia 24061 USA School of Applied and Engineering Physics Cornell University Ithaca New York 14853-3501 USA Advanced Computing Mathematics and Data Division Pacific Northwest National Laboratory Richland Washington 99352 USA Division of Applied Mathematics Brown University Providence Rhode Island 02912 USA Center for Soft Matter and Biological Physics Virginia Tech Blacksburg Virginia 24061 USA

Increasing the concentration of counterions (salt) is known to reduce the bending persistence length of DNA. Here we use atomistic molecular dynamics simulations to predict that multivalent counterions have the opposite effect on double-stranded RNA, increasing its bending rigidity by at least 30%. This counterintuitive effect is observed for various tri- and tetravalent ions alike, and is robust to methodological details and the RNA sequence. In contrast to DNA, multivalent counterions bind inside the RNA major groove, causing significant contraction of the molecule along its helical axis—as a result, its further deformation due to bending becomes energetically more expensive compared to bending without bound multivalent ions. Thus, the relationship between mechanical properties of a charged polymer and its ionic atmosphere may be richer than previously thought.

关键词： Bending Persistence length RNA structure

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A Generalized Density Dissipation for Weakly-compressible SPH

arXiv

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arXiv 2023年

作者： Zheng, Bo Xue Cai, Zhi Wen Zhao, Pei Dong Xu, Xiao Yang Chan, Tak Shing Yu, Peng Guangdong Provincial Key Laboratory of Turbulence Research and Applications Department of Mechanics and Aerospace Engineering Southern University of Science and Technology Shenzhen518055 China Department of Mathematics University of Oslo Oslo0851 Norway China Ship Scientific Research Center Wuxi214082 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China School of Naval Architecture and Ocean Engineering Dalian University of Technology Dalian116024 China School of Computer Science and Technology Xi’an University of Science and Technology Xi’an710054 China Center for Complex Flows and Soft Matter Research Southern University of Science and Technology Shenzhen518055 China

The weakly compressible Smoothed Particle Hydrodynamics (SPH) is known to suffer from the pressure oscillation, which would undermine the simulation stability and accuracy. To address this issue, we propose a generalized density dissipation scheme suitable for both single-phase and multiphase flow simulations. Our approach consists of two components. Firstly, we replace the basic density dissipation with the density increment dissipation to enable numerical dissipation crossing the interfaces of different fluids in multiphase flow. Secondly, based on the dissipation volume conservation, we utilize dissipation volume correction factor (VCF) to stabilize the simulations for multiphase flows with large density ratio. We demonstrate the accuracy, stability, and robustness of our method through four three-dimensional benchmarks, i.e., the sloshing under external excitations, the single and double bubbles rising, Rayleigh-Taylor instability, and Kelvin-Helmholtz instability. Additionally, our study reveals the relationship between SPH with the density dissipation and the approximate Riemann solver. Copyright © 2023, The Authors. All rights reserved.

关键词： Multiphase flow

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ROBUST OUTPUT FEEDBACK CONTROL FOR DISCRETE TIME-DELAY UNCERTAIN SYSTEMS

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CONTROL AND INTELLIGENT SYSTEMS 2006年第1期34卷 57-62页

作者： Shi, P. Lin, Z. Shi, Y. School of Technology University of Glamorgan Pontypridd CF37 1DL United Kingdom Department of Electrical and Computer Engineering University of Toronto Toronto Ont. M5S 3G4 Canada School of Information Science Kyushu Tokai University Kumamoto 862-8652 9-1-1 Toroku Japan School of Technology University of Glamorgan United Kingdom IMA United Kingdom IEEE United Kingdom University of Toronto Canada School of Information Science Kyushu Tokai University Japan World Scientific and Engineering Academy and Society (WSEAS) Japan Japan Society for Fuzzy Theory and Intelligent Informatics (SOFT) Japan Information Processing Society Japan Biomedical Fuzzy Systems Association (BMFSA) Japan

This paper studies the problem of robust output feedback control of discrete time-delay systems with parameter uncertainties. The parameter uncertainties under consideration are time varying and norm bounded. A sufficient condition for the existence of a dynamic output-feedback controller is presented in terms of linear matrix inequalities (LMIs). It is also shown that the set of dynamic output-feedback controller can be implicitly parameterized by the solutions (X, Y, R, S) to the LMIs. An example is given to demonstrate the potential of the proposed techniques.

关键词： LMI parameter uncertainty time-delay system robust control

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SkinSource: A Data-Driven Toolbox for Predicting Touch-Elicited Vibrations in the Upper Limb

SkinSource: A Data-Driven Toolbox for Predicting Touch-Elici...

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (HAPTICS)

作者： Neeli Tummala Gregory Reardon Simone Fani Dustin Goetz Matteo Bianchi Yon Visell the Department of Electrical and Computer Engineering University of California Santa Barbara Santa Barbara CA USA the Media Arts and Technology Program University of California Santa Barbara Santa Barbara CA USA the School of Biological and Health Systems Engineering Arizona State University Tempe AZ USA the Soft Robotics for Human Cooperation and Rehabilitation Lab Instituto Italiano di Tecnologia Geneva GE Italy the Department of Mechanical Engineering University of California Santa Barbara Santa Barbara CA USA the Department of Information Engineering University of Pisa PI Italy the Department of Biological Engineering University of California Santa Barbara Santa Barbara CA USA

Vibrations transmitted throughout the hand and arm during touch contact play a central role in haptic science and engineering but are challenging to model or experimentally characterize. Here, we present SkinSource, a data-driven toolbox for predicting skin vibrations across the upper limb in response to user-specified input forces. The toolbox leverages impulse response measurements that encode the physics of vibration transmission across the hands and arms of four participants and provides software tools for analyzing the predicted skin responses. We show that the SkinSource predictions closely match experimental measurements and confirm the underlying assumption of linear vibration transmission in the skin. We also demonstrate through several usage examples how SkinSource can act as a versatile computational platform for haptic research applications, such as characterizing vibrotactile transmission in the skin, engineering haptic interfaces, and investigating touch perception.

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Transformation between elastic dipoles, quadrupoles, octupoles and hexadecapoles driven by surfactant self-assembly in nematic emulsion

arXiv

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arXiv 2022年

作者： Senyuk, Bohdan Mozaffari, Ali Crust, Kevin Zhang, Rui de Pablo, Juan J. Smalyukh, Ivan I. Department of Physics and Soft Materials Research Center University of Colorado Boulder CO United States Pritzker School of Molecular Engineering The University of Chicago ChicagoIL United States Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Center for Molecular Engineering Argonne National Laboratory LemontIL United States Department of Electrical Computer and Energy Engineering Materials Science and Engineering Program University of Colorado Boulder CO United States Renewable and Sustainable Energy Institute National Renewable Energy Laboratory University of Colorado Boulder CO United States

Emulsions comprising isotropic fluid drops within a nematic host are of interest for applications ranging from biodetection to smart windows, which rely on changes of molecular alignment structures around the drops in response to chemical, thermal, electric and other stimuli. We show that absorption or desorption of trace amounts of common surfactants can drive continuous transformations of elastic multipoles induced by the droplets within the uniformly aligned nematic host. Out-of-equilibrium dynamics of director structures emerge from a controlled self-assembly or desorption of different surfactants at the drop-nematic interfaces, with ensuing forward and reverse transformations between elastic dipoles, quadrupoles, octupoles and hexadecapoles. We characterize inter-transformations of droplet-induced surface and bulk defects, probe elastic pair interactions and discuss emergent prospects for fundamental science and applications of the reconfigurable nematic emulsions. © 2022, CC BY-NC-ND.

关键词： Surface active agents

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Inhibiting carbonate formation using CO_(2)-CO-C2+tandems

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SmartMat 2021年第4期2卷 423-425页

作者： Ning Wang Kaili Yao Alberto Vomiero Yuhang Wang Hongyan Liang School of Materials Science and Engineering Tianjin UniversityTianjinChina Key Laboratory of Efficient Utilization of Low and Medium Grade Energy Ministry of EducationTianjin UniversityTianjinChina Department of Electrical and Computer Engineering University of TorontoTorontoOntarioCanada Division of Materials Science LuleåUniversity of TechnologyLuleåSweden Department of Molecular Sciences and Nanosystems Ca'Foscari University of VeniceVeniceItaly Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory of Carbon‐based Functional Materials and DevicesSoochow UniversitySuzhouJiangsuChina

As climate changes are increasingly challenging the sustainable development of human society,substantial efforts are expected to be added to limit the rise of global warming below 2°C by the middle of the 21st ***,human activities emit 34 billion tons of CO_(2) per annum on average.1 Energy production and chemical industries are particularly emission‐intensive due to the manufacturing and use of fossil‐based ***,manufacturing fuels and chemicals with netzero emission or,ideally,negative emission is paramount for achieving the long‐term goal of the Paris Agreement.

关键词： carbonate chemicals limit

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Sculpting liquid crystal skyrmions with external flows

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Physical Review Research 2023年第3期5卷 033210-033210页

作者： Rodrigo C. V. Coelho Hanqing Zhao Mykola Tasinkevych Ivan I. Smalyukh Margarida M. Telo da Gama Centro de Física Teórica e Computacional Faculdade de Ciências Universidade de Lisboa 1749-016 Lisboa Portugal Departamento de Física Faculdade de Ciências Universidade de Lisboa P-1749-016 Lisboa Portugal Department of Physics and Soft Materials Research Center University of Colorado Boulder Colorado 80309 USA SOFT Group School of Science and Technology Nottingham Trent University Clifton Lane Nottingham NG11 8NS United Kingdom International Institute for Sustainability with Knotted Chiral Meta Matter Hiroshima University Higashihiroshima 739-8511 Japan Department of Electrical Computer and Energy Engineering and Materials Science and Engineering Program University of Colorado Boulder Colorado 80309 USA Renewable and Sustainable Energy Institute National Renewable Energy Laboratory and University of Colorado Boulder Colorado 80309 USA

We investigate, using experiments and numerical simulations, the distortions and the alignment of skyrmions in liquid crystal under external flows for a range of average flow velocities. The simulations are based on the Landau-de Gennes Q tensor theory both for isolated as well as for systems with many skyrmions. We found striking flow-driven elongation of an isolated skyrmion and flow alignment of skyrmions in the many-skyrmion system, both of which are also observed in the experiments. In the simulations, particular attention was given to the dissipation rate and to the various dissipation channels for a single skyrmion under external flow. This analysis provides insight on the observed scaling regime of the elongation of isolated flowing skyrmions and revealed a surprising plastic response at very short times, which may be relevant in applications based on the alignment of soft structures such as liquid crystal skyrmions.

关键词： Complex fluids Living matter & active matter Lattice-Boltzmann methods Optical microscopy Photoluminescence

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Information and motor constraints shape melodic diversity across cultures

arXiv

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arXiv 2024年

作者： McBride, John M. Kim, Nahie Nishikawa, Yuri Saadakeev, Mekhmed Pearce, Marcus Tlusty, Tsvi Center for Algorithmic and Robotized Synthesis Institute for Basic Science Ulsan44919 Korea Republic of School of Business Administration Ulsan National Institute of Science and Technology Ulsan44919 Korea Republic of Department of Molecular Life Science Tokai University School of Medicine Kanagawa Japan Department of Biomedical Engineering Ulsan National Institute of Science and Technology Ulsan44919 Korea Republic of Cognitive Science Research Group School of Electronic Engineering & Computer Science Queen Mary University of London London United Kingdom Department of Clinical Medicine Aarhus University Aarhus Denmark Center for Soft and Living Matter Institute for Basic Science Ulsan44919 Korea Republic of Departments of Physics and Chemistry Ulsan National Institute of Science and Technology Ulsan44919 Korea Republic of

The number of possible melodies is unfathomably large, yet despite this virtually unlimited potential for melodic variation, melodies from different societies can be surprisingly similar. The motor constraint hypothesis accounts for certain similarities, such as scalar motion and contour shape, but not for other major common features, such as repetition, song length, and scale size. Here we investigate the role of information constraints arising from limitations on human memory in shaping these hallmarks of melodies. We measure determinants of information rate in 62 corpora of Folk melodies spanning several continents, finding multiple trade-offs that all act to constrain the information rate across societies. By contrast, 39 corpora of Art music from Europe (including Turkey) show longer, more complex melodies, and increased complexity over time, suggesting different cultural-evolutionary selection pressures in Art and Folk music, possibly due to the use of written versus oral transmission. Our parameter-free model predicts the empirical scale degree distribution using information constraints on scalar motion, melody length, and, most importantly, information rate. This provides strong evidence that information constraints during cultural transmission of music limit the number of notes in a scale, and proposes that preference for intermediate melodic complexity is a fundamental constraint on the cultural evolution of melody. © 2024, CC BY-NC-SA.

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