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SSRN 2023年

作者： Lai, Chi-Yu Liao, Yin-Song Ku, Hao-Yu Jao, Wen-Yang Gull, Sanna Chen, Han-Yi Chou, Jyh-Pin Hu, Chi-Chang Department of Chemical Engineering National Tsing Hua University Hsinchu300044 Taiwan Tsing Hua Interdisciplinary Program National Tsing Hua University Hsinchu300044 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu300044 Taiwan Department of Physics National Changhua University of Education Changhua50074 Taiwan

Aqueous zinc-based energy storage devices possess superior safety, cost-effectiveness, and high energy density;however, dendritic growth and side reactions on the zinc electrode curtail their widespread applications. In this study, we mitigate these issues by introducing a polyimide (PI) nanofabric interfacial layer onto the zinc substrate. Simulations reveal that the PI nanofabric promotes a pre-desolvation process, effectively desolvating hydrated zinc ions from Zn(H2O)62+ to Zn(H2O)42+ before approaching zinc surface. The exposed zinc ion in Zn(H2O)42+ provides an accelerated charge transfer process and reduces the activation energy for zinc deposition from 40 to 21 kJ mol−1. The PI nanofabric also acts as a protective barrier, reducing water molecule interactions and side reactions at the electrode. The PI-Zn symmetric cell exhibits remarkable cycling stability over 1200 h, maintaining a dendrite-free morphology and minimal byproduct formation. Moreover, the cell exhibits high stability and low voltage hysteresis even under high current densities (20 mA cm−2, 10 mAh cm−2) thanks to the three-dimensional porous structure of PI nanofabric. When integrated into full cells, the PI-Zn||AC hybrid zinc-ion capacitor and PI-Zn||MnVOH@SWCNT zinc-ion battery achieve impressive lifespans of 15000 and 600 cycles with outstanding capacitance retention. This approach paves a novel avenue for high-performance zinc metal electrodes. © 2023, The Authors. All rights reserved.

关键词： Charge transfer

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Bioresorbable Multilayer Photonic Cavities as Temporary Implants for Tether-Free Measurements of Regional Tissue Temperatures

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Biomedical engineering Frontiers 2021年第1期2卷 89-102页

作者： Wubin Bai Masahiro Irie Zhonghe Liu Haiwen Luan Daniel Franklin Khizar Nandoliya Hexia Guo Hao Zang Yang Weng Di Lu Di Wu Yixin Wu Joseph Song Mengdi Han Enming Song Yiyuan Yang Xuexian Chen Hangbo Zhao Wei Lu Giuditta Monti Iwona Stepien Irawati Kandela Chad R.Haney Changsheng Wu Sang Min Won Hanjun Ryu Alina Rwei Haixu Shen Jihye Kim Hong-Joon Yoon Wei Ouyang Yihan Liu Emily Suen Huang-yu Chen Jerry Okina Jushen Liang Yonggang Huang Guillermo A.Ameer Weidong Zhou John A.Rogers Department of Materials Science and Engineering Northwestern UniversityEvanstonIllinois 60208USA Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIllinois 60208USA Department of Electrical Engineering University of Texas at ArlingtonArlingtonTX 76019USA Department of Mechanical Engineering Northwestern UniversityEvanstonIllinois 60208USA Department of Chemistry Northwestern UniversityEvanstonIllinois 60208USA Department of Biomedical Engineering Northwestern UniversityEvanstonIllinois 60208USA Department of Materials Science and Engineering University of Illinois Urbana-ChampaignUrbanaIllinois 61801USA Academy for Advanced Interdisciplinary Studies Peking UniversityBeijingChina Department of Aerospace and Mechanical Engineering University of Southern CaliforniaLos AngelesCA 90089USA The Center for Developmental Therapeutics Northwestern UniversityEvanstonIllinois 60208USA Center for Advanced Molecular Imaging Northwestern UniversityEvanstonIllinois 60208USA Department of Electrical and Computer Engineering Sungkyunkwan UniversitySuwonRepublic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Neurobiology Northwestern UniversityEvanstonIllinois 60208USA Department of Chemical Engineering Northwestern UniversityEvanstonIllinois 60208USA Department of Civil and Environmental Engineering Northwestern UniversityEvanstonIllinois 60208USA Department of Electrical Engineering and Computer Science Northwestern UniversityEvanstonIllinois 60208USA Northwestern Medicine Feinberg School of MedicineNorthwestern UniversityEvanstonIllinois 60208USA Center for Advanced Regenerative Engineering Northwestern UniversityEvanstonIllinois 60208USA

Objective and Impact ***-time monitoring of the temperatures of regional tissue microenvironments can serve as the diagnostic basis for treating various health conditions and *** thermal sensors allow measurements at surfaces or at near-surface regions of the skin or of certain body *** at depth require implanted devices connected to external readout electronics via physical interfaces that lead to risks for infection and movement constraints for the ***,surgical extraction procedures after a period of need can introduce additional risks and ***,we report a wireless,bioresorbable class of temperature sensor that exploits multilayer photonic cavities,for continuous optical measurements of regional,deep-tissue microenvironments over a timeframe of interest followed by complete clearance via natural body *** designs decouple the influence of detection angle from temperature on the reflection spectra,to enable high accuracy in sensing,as supported by in vitro experiments and optical *** with devices implanted into subcutaneous tissues of both awake,freely moving and asleep animal models illustrate the applicability of this technology for in vivo *** results demonstrate the use of bioresorbable materials in advanced photonic structures with unique capabilities in tracking of thermal signatures of tissue microenvironments,with potential relevance to human healthcare.

关键词： signature constraints multilayer

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Achieving 16.68% efficiency ternary as-cast organic solar cells

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science China Chemistry 2021年第4期64卷 581-589页

作者： Ruijie Ma Yang Tao Yuzhong Chen Tao Liu Zhenghui Luo Yuan Guo Yiqun Xiao Jin Fang Guangye Zhang Xiaojun Li Xia Guo Yuanping Yi Maojie Zhang Xinhui Lu Yongfang Li He Yan Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China School of Light Industry and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Department of Physics Chinese University of Hong KongNew TerritoriesHong KongChina Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China Beijing National Laboratory for Molecular Science Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Hong Kong University of Science and Technology-Shenzhen Research Institute Shenzhen 518057China eFlexPV Limited Flat/RM B12/FHang Seng Causeway Bay BLDGCauseway BayHong KongChina Centre for Mechanical Technology and Automation Department of Mechanical EngineeringUniversity of AveiroAveiroPortugal

State-of-the-art organic solar cells(OSCs)often require the use of high-boiling point additive or post-treatment such as temperature annealing and solvent vapor annealing to achieve the best ***,additives are not desirable in largescale industrial printing process,while post-treatment also increases the production *** this article,we report highly efficient ternary OSCs based on PM6:BTP-Cl Br1:BTP-2O-4Cl-C12(weight ratio=1:1:0.2),with 16.68%power conversion efficiency(PCE)for as-cast device,relatively close to its annealed counterpart(17.19%).Apart from obvious energy tuning effect and complementary absorption spectra,the improved PCE of ternary device is mainly attributed to improved morphological properties including the more favorable materials miscibility,crystallinity,domain size and vertical phase separation,which endorse suppressed *** result of this work provides understanding and guidance for high-performance as-cast OSCs through the ternary strategy.

关键词： organic solar cells as-cast ternary morphology high-performance

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Atomic-Scale Identification of Defects in Alite

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SSRN 2023年

作者： Zheng, Qi Liang, Chengyao Jiang, Jinyang Mao, Haiyan Bustillo, Karen C. Song, Chengyu Reimer, Jeffrey A. Monteiro, Paulo J.M. Zheng, Haimei Li, Shaofan Department of Civil and Environmental Engineering University of California BerkeleyCA94720 United States Materials Science Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States School of Materials Science and Engineering Southeast University Nanjing211189 China Department of Chemical and Biomolecular Engineering University of California Berkeley BerkeleyCA94720 United States National Center for Electron Microscopy Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyCA94720 United States

In this study, we used scanning transmission electron microscopy to unravel the defects in alite particles at the atomic level. Our observations identified different types of defects, including vacancies, doping, dislocations, rough surfaces, and grain boundaries. Atomic ordering in the alite crystal was further examined based on our single-atom recognition method. Our findings indicate that defects in cement particles may serve as reactive sites during early hydration, facilitating the initial dissolution and providing nucleation sites for hydration products. This work provides insights into cement defects at the single-atom level and offers new opportunities in tuning the hydration process through defect engineering of cement particles. © 2023, The Authors. All rights reserved.

关键词： Scanning electron microscopy

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Liquid-like thermal conductivity in solid materials: Dynamic behavior of silver ions in argyrodites

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Nano Energy 2024年 122卷

作者： Wei, Pai-Chun Hsing, Cheng-Rong Yang, Chun-Chuen Tung, Yung-Hsiang Wu, Hsin-Jay Yen, Wan-Ting Lai, Yen-Chung Lee, Jey-Jau Wang, Chin-Wei Wu, Hung-Cheng Yang, Hung-Duen Singaravelu, Venkatesh Miao, Xiaohe Giugni, Andrea Hu, Jia-Kai Fu, Jui-Han Tung, Vincent He, Jian Wei, Ching-Ming He, Jr-Hau Department of Materials Science and Engineering National Cheng Kung University Tainan70101 Taiwan Division of Natural Science Center for General Education Chang Gung University Taoyuan City33302 Taiwan Department of Physics National Central University Taoyuan City320317 Taiwan Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan National Synchrotron Radiation Research Center Hsin-Chu30076 Taiwan Department of Physics and Center of Crystal Research National Sun Yat-Sen University Kaohsiung80424 Taiwan Core Laboratories King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Instrumentation and Service Center for Physical Sciences Westlake University China Department of Physics University of Milano Milano20133 Italy Department of Chemical System Engineering School of Engineering The University of Tokyo Tokyo113-8656 Japan Department of Physics and Astronomy Clemson University Clemson29634-0978 United States Institute of Atomic and Molecular Sciences Academia Sinica Taipei10617 Taiwan Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong

Argyrodite-type compounds are renowned for their exceptional thermoelectric performance and ultralow thermal conductivity. While the latter is commonly attributed to the superionic behavior of cations, there has been limited research into how cations' static or dynamic behavior affects the thermal transport properties of argyrodites. To address and bridge this research gap, we employ a wide range of measurements and develop ab-initio based machine-learning interatomic potentials to perform large-scale molecular dynamics simulations on Ag8SiTe6 under different temperatures. We highlight the symmetry breaking and lattice-distortion scattering caused by chilled ions at low temperatures and the enhanced ionic diffusion behavior at elevated temperatures endowing argyrodites with superior superionicity and liquid-like thermal conductivity. Our findings also provide valuable insights into the ionic diffusion kinetics and the exotic lattice dynamics of liquid-like thermoelectrics. © 2024

关键词： molecular dynamics

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NIR-Ⅱ Excitation and NIR-I Emission Based Two-photon Fluorescence Lifetime Microscopic Imaging Using Aggregation-induced Emission Dots

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chemical Research in Chinese Universities 2021年第1期37卷 171-176页

作者： LIU Wen ZHANG Yuhuang QI Jj QIAN Jun TANG Ben Zhong State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou310058P.R.China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhou510640P.R.China Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced Study and Department of Chemical and Biological Engineering and Institute of Molecular Functional MaterialsThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongP.R.China

Near-infrared(NIR)lights are powerful tools to conduct deep-tissue imaging since NIR-Ⅰ wavelengths hold less photon absorption and NIR-Ⅱ wavelengths serve low photon scattering in the biological tissues compared with visible ***-photon fluorescence lifetime microscopy(2PFLM)can utilize NIR-Ⅱ excitation and NIR-Ⅰ emission at the same time with the assistance of a well-designed fluorescent *** induced emission(AIE)dyes are famous for unique optical properties and could serve a large two-photon absorption(2PA)cross-section as aggregated ***,we report two-photon fluorescence lifetime microscopic imaging with NIR-Ⅱ excitation and NIR-Ⅰ emission using a novel deep-red AIE *** AIE-gens held a 2PA cross-section as large as 1.61×10^(4)GM at 1040 *** AIE dots had a two-photon fluorescence peak at 790 nm and a stable lifetime of 2.2 ns under the excitation of 1040 nm femtosecond *** brain vessels of a living mouse were vividly reconstructed with the two-photon fluorescence lifetime information obtained by our home-made 2PFLM *** vessels as small as 3.17µm were still observed with a nice signal-background ratio at the depth of 750µ*** work will inspire more insight into the improvement of the working wavelength of fluorescent agents and traditional 2PFLM.

关键词： Near-infrared Brain imaging Aggregation-induced emission Two-photon fluorescence lifetime microscopic imaging

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Multimodal Sensing Algorithm Using Thermoelectric Dynamics for Self-Powered Skin-Like Sensory Devices

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SSRN 2023年

作者： Lee, Hyeju Baek, Jong Jin Oh, Jin Young Lee, Tae Il Department of Materials Science and Engineering Gachon University Gyeonggi Seong-Nam13120 Korea Republic of Advanced Development Team Ilji Tech Co. Ltd. Sinsang-ri Jillyang-eup Gyeongsangbuk-do Gyeongsan-si 12103 Korea Republic of Department of Chemical Engineering Integrated Engineering Program Kyung Hee University Yongin17104 Korea Republic of

In the rapidly evolving field of electronic skins (e-skins), the development of self-powered sensors has emerged as a promising solution to providing continuous and reliable power sources for embedded sensors. This study introduces a novel approach that incorporates spike-shaped nickel (Ni) microparticles into a styrene-ethylene-butylene-styrene (SEBS) matrix, resulting in a thermoelectric material that functions as both an energy harvester and a pressure sensor, and a multimodal sensing algorithm designed to mitigate pressure sensing errors arising from temperature fluctuations in the thermoelectric self-powered pressure sensor. The Ni-SEBS composite, with a sensing mechanism that identifies changes in the Ni particle percolation state induced by compressive strain, exhibited a high sensitivity of 0.6234 kPa-1. Based on this composite, a dual-channel self-powered sensor was fabricated using the proposed algorithm and attached to the skin;the sensor successfully detected various forms of external pressure applied to the skin without errors due to temperature changes. © 2023, The Authors. All rights reserved.

关键词： Pressure sensors

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Evaluation of Automatic Microstructural Analysis of Energy Dispersive Spectroscopy (EDS) Maps via a Python-Based Data Processing Framework 240

Evaluation of Automatic Microstructural Analysis of Energy D...

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240th ECS Meeting

作者： Batool, Mariah O. Godoy, Andres Birnbach, Martin Dekel, Dario R Jankovic, Jasna Institute of Materials Science University of Connecticut 97 North Eagleville Road StorrsCT06269-3136 United States Department of Materials Science and Engineering University of Connecticut 97 North Eagleville Road StorrsCT06269-3136 United States Wolfson Department of Chemical Engineering Nancy and Stephen Grand Technion Energy Program Israel Institute of Technology Haifa3200003 Israel

ISBN: (纸本)9781607685395

Computer-aided data acquisition, analysis and interpretation have been employed in various research areas generating useful information. Among these, image processing is most often implemented for post-processing of material characterization data. However, to tackle ambiguity of multi-component materials analysis, spectral data analysis can be used instead. The current study introduces a unique Python-based data processing method for in-depth analysis of energy dispersive spectroscopy (EDS) elemental maps to analyze agglomerate size distribution, average area of each component and their overlap. The framework developed in this study is applied to examine interaction of Cerium (Ce) and Palladium (Pd) particles in membrane electrode assembly (MEA) of Anion-Exchange Membrane Fuel Cell (AEMFC) and investigate if this approach can be utilized to predict the fuel cell's electrochemical behavior. The study concludes that the developed framework is a promising method for automatic data extraction and can be beneficial for use in a variety of clean energy applications. © 2021 ECS - The Electrochemical Society.

关键词： Python

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Facile Li-Ion Transport via LLTO Scaffold with Crosslinked Polyethylene Glycol Composite Electrolyte for Solid-State Batteries

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SSRN 2025年

作者： Lee, Jungkuk Counihan, Michael J. Barai, Pallab Burns, Meghan E. Singh, Vibhu V. Jamnuch, Sasawat Pascal, Tod A. Shrinivasan, Venkat Tepavcevic, Sanja Zhang, Yuepeng Applied Materials Division Argonne National Laboratory LemontIL60439 United States Materials Science Division Argonne National Laboratory LemontIL60439 United States Department of Chemistry University of Illinois Chicago ChicagoIL60607 United States ATLAS Materials Physics Lab Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San Diego La Jolla CA92093 United States Microscopy and Microanalysis Research Group Materials Measurement Science Division National Institute of Standards and Technology GaithersburgMD20899 United States Material Science and Engineering Program University of California San Diego La Jolla CA92093 United States Chemical Sciences and Engineering Division Argonne National Laboratory LemontIL60439 United States

Composite polymer electrolytes (CPEs) hold significant promise for solid-state batteries due to their ability to combine the benefits of inorganic fillers and polymer matrices. However, agglomeration of inorganic fillers can disrupt the formation of a percolation pathway, hindering lithium-ion transport. Here, we developed a stable, porous, and interconnected 3-dimentional LLTO (Li0.33La0.557TiO3) nanofiber scaffold and fabricate CPEs using in-situ crosslinked polyethylene glycol (xPEG). The resulting self-standing LLTOxPEG-65 achieved an ionic conductivity of 5.0 × 10−4 S/cm at 30 °C and a critical current density of 0.5 mA/cm2. A significantly lower activation energy (~0.2 eV) was observed in LLTOxPEG-65 compared to pristine xPEG (0.44 eV), indicating a transition of lithium-ion transport pathways from xPEG to the LLTO scaffold. However, increasing the xPEG content led to a decrease in ionic conductivity and a rise in activation energy, approaching that of pristine xPEG. DFT calculations revealed that Li+ transport in the [010] and [001] planes of LLTO predominantly takes place within the bulk rather than along the surface, while a concerted diffusion mechanism was observed in the [100] plane. Additionally, mesoscale-level computational analysis indicated that the high LLTO scaffold fraction (90 wt %) can ensure transport through the bulk of the fibers even with larger interfacial charge transfer resistance, around 1 Ω·cm2 between LLTO and xPEG. Presence of the highly percolated LLTO scaffold helps to promote efficient Li+ transport through the bulk of LLTO. © 2025, The Authors. All rights reserved.

关键词： Activation energy

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An application of conjugate gradient technique for determination of thermal conductivity as an inverse engineering problem

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materials Today: Proceedings 2021年 47卷 3082-3087页

作者： Vivek Pandey Addisu Bekele Gulam Mohammed Sayeed Ahmed Nand Jee Kanu Gyanendra Kumar Singh Department of Thermal and Aerospace Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Centre of Excellence for Advanced Manufacturing Engineering Program of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Department of Mechanical Engineering S. V. National Institute of Technology Surat India Department of Mechanical Design and Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia

Inverse problems frequently occur when boundary conditions/thermal properties of a material are unknown, and are determined from known internal temperature measurements. A direct problem is the opposite of an inverse problem. For example, it would be the task of determining the temperature field within a material body, given boundary conditions and thermal properties. In an ill-posed, inverse problem, small variations in internal temperature measurement cause large variations in the estimated quantity such as boundary heat flux. Measured temperature variations may be due to noise, measurement error and instrumentation error, among other factors. There are various methods for solving inverse problems in materials engineering. In the paper, an inverse problem of estimating boundary heat flux for one-dimensional heat conduction is solved using the classical method of Beck and temperature dependent thermal conductivity is estimated using the more recent and advanced Conjugate Gradient method (CGM). The temperature values from the finite difference application to a direct heat transfer problem are used along with noise added to the data, in order to simulate real world, experimental conditions. The data is applied to the inverse problem of finding boundary heat flux and thermal conductivity. It is seen that Conjugate Gradient Method (CGM) along with sequential function specification method recovers the boundary heat flux and thermal conductivity quite accurately for noise levels of 1% and 2%. It is further observed that addition of future time steps stabilize the algorithm and increase accuracy of the desired results. It is also observed that CGM can recover the temperature dependent thermal conductivity quickly within few iterations, for different values of thermal conductivity function coefficients, k 0 and k 1 . CGM is found to be fast and robust when applied to one-dimensional case and can be extended to complex geometries.

关键词： Inverse problem Thermal conductivity Conjugate gradient

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