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arXiv 2021年

作者： Hemmatyar, Omid Abdollahramezani, Sajjad Zeimpekis, Ioannis Lepeshov, Sergey Krasnok, Alex Khan, Asir Intisar Neilson, Kathryn M. Teichrib, Christian Brown, Tyler Pop, Eric Hewak, Daniel W. Wuttig, Matthias Alù, Andrea Muskens, Otto L. Adibi, Ali School of Electrical and Computer Engineering Georgia Institute of Technology 778 Atlantic Drive NW AtlantaGA30332-0250 United States Zepler Institute Faculty of Engineering and Physical Sciences University of Southampton SouthamptonSO17 1BJ United Kingdom ITMO University St. Petersburg197101 Russia Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical Engineering Department of Materials Science and Engineering Precourt Institute for Energy Stanford University StanfordCA94305 United States Physikalisches Institut IA RWTH Aachen Sommerfeldstrasse 14 Aachen52074 Germany Physics Program Graduate Center City University of New York New YorkNY10016 United States Physics and Astronomy Faculty of Engineering and Physical Sciences University of Southampton SouthamptonSO17 1BJ United Kingdom

Structural colors generated due to light scattering from static all-dielectric metasurfaces have successfully enabled high-resolution, high-saturation, and wide-gamut color printing applications. Despite recent advances, most demonstrations of these structure-dependent colors lack post-fabrication tunability. This hinders their applicability for front-end dynamic display technologies. Phase-change materials (PCMs), with significant contrast of their optical properties between their amorphous and crystalline states, have demonstrated promising potentials in reconfigurable nanophotonics. Herein, we leverage tunable all-dielectric reflective metasurfaces made of newly emerged classes of low-loss optical PCMs, i.e., antimony trisulphide (Sb2S3) and antimony triselenide (Sb2Se3), with superb characteristics to realize switchable, high-saturation, high-efficiency and high-resolution dynamic meta-pixels. Exploiting polarization-sensitive building blocks, the presented meta-pixel can generate two different colors when illuminated by either one of two orthogonally polarized incident beams. Such degrees of freedom (i.e., material phase and polarization state) enable a single reconfigurable metasurface with fixed geometrical parameters to generate four distinct wide-gamut colors. We experimentally demonstrate, for the first time, an electrically-driven micro-scale display through the integration of phase-change metasurfaces with an on-chip heater formed by transparent conductive oxide. Our experimental findings enable a versatile platform suitable for a wide range of applications, including tunable full-color printing, enhanced dynamic displays, information encryption, and anti-counterfeiting. © 2021, CC BY.

关键词： Light scattering

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All-Electric Ship Sustainable Power from Alkaline Membrane Fuel Cells

All-Electric Ship Sustainable Power from Alkaline Membrane F...

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IEEE Electric Ship Technologies Symposium, ESTS

作者： Rodrigo C. Raimundo José V. C. Vargas Juan C. Ordonez Graduate Program in Materials Science Engineering and Sustainable Energy Research and Development Center Federal University of Paraná UFPR Curitiba Brazil Department of Mechanical Engineering Florida State University FSU Tallahassee FL USA

This work proposes a system that combines H2 produced by Al oxidation in water using NaOH as catalyst, and a fuel cell stack to generate power. A cellulosic membrane avoids the use of asbestos (carcinogenic) and ammonia (toxic) based membranes. Aluminum is inexpensive, abundant and fully recyclable. A sustainable alkaline membrane fuel cell (SAMFC) stack with four single cells, the reactor, and CO 2 purifier were built. The results are presented in polarization and power curves. Even with recycled aluminum, the results demonstrate that the SAMFC stack delivered 3.73 V in open circuit and ~3 W of maximum power, which is similar to the stack operating with pure H2. Taking into account that H2 could also be generated by aluminum corrosion in seawater, the main conclusion is that with in situ sustainable H2 production, the SAMFC stack has the potential to become economically competitive, and replace traditional AES power sources.

关键词： Fuel cells Aluminum Voltage measurement Prototypes Electrolytes Current measurement Marine vehicles

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New type of half-metallic fully compensated ferrimagnet

arXiv

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arXiv 2021年

作者： Semboshi, S. Umetsu, Rie Y. Kawahito, Y. Akai, H. Institute for Materials Research Tohoku University 2-1-1 Katahira Sendai980-8577 Japan Center for Spintronics Research Network Tohoku University 2-1-1 Katahira Sendai980-8577 Japan Center for Science and Innovation in Spintronics 2-1-1 Katahira Sendai980-8577 Japan Advanced Science-Technology Research Program Japan Agency for Marine-Earth Science and Technology 2-15 Natsushima Yokosuka Kanagawa237-0061 Japan Department of Applied Physics Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka565-0871 Japan The Institute for Solid State Physics The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8581 Japan

Half-metallic fully compensated ferrimagnets (HM-FCFMs), a special class of half-metals exhibiting zero magnetization at absolute zero, are promising candidates for next-generation spintronics applications. For over 25 years, theoretical studies have been conducted to realize HM-FCFM materials for practical applications. Herein, we experimentally demonstrate a NiAs-type hexagonal-structured (CrFe)S compound that could serve as an HM-FCFM material. It has a half-metallic nature, with 100% spin-polarized Fermi surfaces and zero magnetization. Further, the magnetization shows a linear behavior as a function of the magnetic field below the compensation temperature of around 200 K, with high magnetic coercivity of 38 kOe at 300 K. These magnetic features are expected to contribute to a quantum leap in the application of HM-FCFM layers in spintronics devices. Copyright © 2021, The Authors. All rights reserved.

关键词： Ferrimagnetism

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Reconfigurable Hyperbolic Polaritonics with Correlated Oxide Metasurfaces

Research Square

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Research Square 2021年

作者： Aghamiri, Neda Alsadat Hu, Guangwei Fali, Alireza Zhang, Zhen Li, Jiahan Balendhran, Sivacarendran Walia, Sumeet Sriram, Sharath Edgar, James H. Ramanathan, Shriram Alù, Andrea Abate, Yohannes Department of Physics and Astronomy University of Georgia AthensGA30602 United States Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical and Computer Engineering National University of Singapore Kent Ridge Singapore117583 Singapore School of Materials Engineering Purdue University West LafayetteIN47907 United States Tim Taylor Department of Chemical Engineering Kansas State University ManhattanKN 66506 United States School of Physics University of Melbourne ParkvilleVIC3010 Australia School of Engineering RMIT University MelbourneVIC Australia Functional Materials and Microsystems Research Group Micro Nano Research Facility RMIT University MelbourneVIC Australia ARC Centre of Excellence for Transformative Meta-Optical Systems RMIT University MelbourneVIC Australia Physics Program Graduate Center City University of New York New YorkNY10016 United States

Polaritons enable subwavelength confinement and highly anisotropic flows of light over a wide spectral range, holding the promise for applications in modern nanophotonic and optoelectronic devices. However, to fully realize their practical application potential, facile methods enabling nanoscale active control of polaritons are needed. Here, we introduce a hybrid polaritonic-oxide heterostructure platform consisting of van der Waals crystals, such as hexagonal boron nitride (hBN) or alpha-phase molybdenum trioxide (α-MoO3), transferred on nanoscale oxygen vacancy patterns on the surface of prototypical correlated perovskite oxide SmNiO3 (SNO). Using a combination of scanning probe microscopy and infrared nanoimaging techniques, we demonstrate nanoscale real-time reconfigurability of complex hyperbolic phonon polaritons patterned at the nanoscale with unmatched resolution. Hydrogenation and temperature modulation allow spatially localized conductivity modulation of SNO nanoscale patterns, enabling robust real-time modulation and nanoscale reconfiguration of hyperbolic polaritons. Our work paves the way towards nanoscale programmable metasurface engineering as a new paradigm for reconfigurable nanophotonic applications facilitated by a hybrid material platform exploiting extreme light-matter interactions in polaritonic systems. © 2021, CC BY.

关键词： Polariton

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Correction: Optimization of the clinically approved Mg-Zn alloy system through the addition of Ca

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biomaterials Research 2022年第1期26卷 1-1页

作者： Hyung-Jin Roh Do-Hyang Kim Jaeho Park Sun-Hee Lee Gwang-Chul Lee Hojeong Jeon Hyung-Seop Han Yu-Chan Kim Jeong-Yun Sun Minseong Chae Kang-Sik Lee Dong-Ho Lee Nanostructural Material Laboratory Department of Advanced Materials Yonsei University Seoul 03722 Republic of Korea Center for Biomaterials Korea Institute of Science and Technology Seoul 02792 Republic of Korea Research and Development Center U&I Corporation Uijongbu 480-050 Republic of Korea Department of Materials science and Engineering Seoul National University Seoul 08826 Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea University Seoul 02841 Republic of Korea Biomedical Engineering Research Center Asan Institute for Life Sciences Asan Medical Center College of Medicine University of Ulsan Seoul 05505 Republic of Korea Department of Orthopedic Surgery Asan Medical Center College of Medicine University of Ulsan Seoul 05505 Republic of Korea

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Room temperature tunable coupling of single photon emitting quantum dots to localized and delocalized modes in plasmonic nanocavity array

arXiv

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arXiv 2020年

作者： Yadav, Ravindra Kumar Liu, Wenxiao Li, Ran Odom, Teri W. Agarwal, Girish S. Basu, Jaydeep K. Department of Physics Indian Institute of Science Bangalore560012 India Texas A&M University College StationTX77843 United States Shaanxi Province Key Laboratory for Quantum Information and Quantum Optoelectronic Devices Xi0an Jiaotong University Xi0an710049 China Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States Graduate Program in Applied Physics Northwestern University EvanstonIL60208 United States Department of Materials Science and Engineering Northwestern LemontIL60439 United States Department of Chemistry Northwestern University EvanstonIL60208 United States

Single photon sources (SPS), especially those based on solid state quantum emitters, are key elements in future quantum technologies. What is required is the development of broadband, high quantum efficiency, room temperature SPS which can also be tunably coupled to optical cavities which could lead to development of all-optical quantum communication platforms. In this regard deterministic coupling of SPS to plasmonic nanocavity arrays has great advantage due to long propagation length and delocalized nature of surface lattice resonances (SLRs). Guided by these considerations, we report experiments on the room temperature tunable coupling of single photon emitting colloidal quantum dots (CQDs) to localised and delocalised modes in plasmonic nanocavity arrays. Using time-resolved photo-luminescence measurement on isolated CQD, we report significant advantage of SLRs in realizing much higher Purcell effect, despite large dephasing of CQDs, with values of ∼ 22 and ∼ 6 for coupling to the lattice and localised modes, respectively. We present measurements on the antibunching of CQDs coupled to these modes with g(2)(0) values in quantum domain providing evidence for an effective cooperative behavior. We present a density matrix treatment of the coupling of CQDs to plasmonic and lattice modes enabling us to model the experimental results on Purcell factors as well as on the antibunching. We also provide experimental evidence of indirect excitation of remote CQDs mediated by the lattice modes and propose a model to explain these observations. Our study demonstrates the possibility of developing nanophotonic platforms for single photon operations and communications with broadband quantum emitters and plasmonic nanocavity arrays since these arrays can generate entanglement between to spatially separated quantum emitters. Copyright © 2020, The Authors. All rights reserved.

关键词： Semiconductor quantum dots

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Correction to:Vascular Endothelial Growth Factor‑Recruiting Nanofiber Bandages Promote Multifunctional Skin Regeneration via Improved Angiogenesis and Immunomodulation

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Advanced Fiber materials 2023年第2期5卷 694-694页

作者： Yi Chen Zhengchao Yuan Weiyan Sun Muhammad Shafiq Jun Zhu Jiafei Chen Hai Tang Ling Hu Weikang Lin Yanxi Zeng Long Wang Lei Zhang Yunlang She Hui Zheng Guofang Zhao Dong Xie Xiumei Mo Chang Chen Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji UniversityShanghai 200092China Shanghai Engineering Research Center of Lung Transplantation Shanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano‑Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620China Center for Life Science Tsinghua UniversityBeijing 100084China State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Brain ScienceFudan UniversityShanghai 200433China Department of Chemical Engineering Faculty of EngineeringGraduate SchoolKyushu UniversityFukuoka 819‑0395Japan Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092China Department of Biotechnology Faculty of Science and TechnologyUniversity of Central Punjab(UCP)Lahore 54000Pakistan Department of Cardiothoracic Surgery Hwa Mei HospitalUniversity of Chinese Academy of SciencesNingbo 315000China Ningbo Institute of Life and Health Industry University of Chinese Academy of SciencesNingbo 315000China

Correction to:Advanced Fiber materials https://***/10.1007/s42765-022-00226-8 In this article the author name Muhammad Shafiq was incorrectly written as Shafiq *** original article has been corrected.

关键词： Skin Regeneration Vascular

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Efficient Formulation of Polarizable Gaussian Multipole Electrostatics for Biomolecular Simulations

arXiv

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arXiv 2020年

作者： Wei, Haixin Qi, Ruxi Wang, Junmei Cieplak, Piotr Duan, Yong Luo, Ray Departments of Molecular Biology and Biochemistry Chemical and Biomolecular Engineering Materials Science and Engineering and Biomedical Engineering Graduate Program in Chemical and Materials Physics University of California Irvine IrvineCA92697 United States Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening Center School of Pharmacy University of Pittsburgh PittsburghPA15261 United States SBP Medical Discovery Institute 10901 North Torrey Pines Road San diegoCA92037 United States UC Davis Genome Center Department of Biomedical Engineering University of California Davis One Shields Avenue DavisCA95616 United States

Molecular dynamics simulations of biomolecules have been widely adopted in biomedical studies. As classical point-charge models continue to be used in routine biomolecular applications, there have been growing demands on developing polarizable force fields for handling more complicated biomolecular processes. Here we focus on a recently proposed polarizable Gaussian Multipole (pGM) model for biomolecular simulations. A key benefit of pGM is its screening of all short-range electrostatic interactions in a physically consistent manner, which is critical for stable charge-fitting and is needed to reproduce molecular anisotropy. Another advantage of pGM is that each atom’s multipoles are represented by a single Gaussian function or its derivatives, allowing for more efficient electrostatics than other Gaussian-based models. In this study we present an efficient formulation for the pGM model defined with respect to a local frame formed with a set of covalent basis vectors. The covalent basis vectors are chosen to be along each atom’s covalent bonding directions. The new local frame allows molecular flexibility during molecular simulations and facilitates an efficient formulation of analytical electrostatic forces without explicit torque computation. Subsequent numerical tests show that analytical atomic forces agree excellently with numerical finite-difference forces for the tested system. Finally, the new pGM electrostatics algorithm is interfaced with the PME implementation in Amber for molecular simulations under the periodic boundary conditions. To validate the overall pGM/PME electrostatics, we conducted an NVE simulation for a small water box of 512 water molecules. Our results show that, to achieve energy conservation in the polarizable model, it is important to ensure enough accuracy on both PME and induction iteration. It is hoped that the reformulated pGM model will facilitate the development of future force fields based on the pGM electrostatics for applicatio

关键词： Electrostatics

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Direct writing of PVBVA/Ti3C2 Tx (MXene) triboelectric nanogenerators for energy harvesting and sensing applications

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Nano Energy 2025年 142卷

作者： Pratap, Ajay Rajabi Kouchi, Fereshteh Burgoyne, Hailey Curtis, Michael Rektor, Attila Seol, Myeong-Lok Mansoor, Naqsh E. Varghese, Tony Valayil Eixenberger, Josh Efaw, Corey M. Zuzelski, Matt Little, Isaac Fujimoto, Kiyo Deng, Zhangxian Shuck, Christopher E. Koehne, Jessica E. Estrada, David Micron School of Material Science and Engineering Boise State University BoiseID83725 United States Biomolecular Sciences Graduate Program Boise State University BoiseID83725 United States NASA Ames Research Center Universities Space Research Association Moffett Field CA94035 United States Department of Physics Boise State University BoiseID83725 United States Center for Advanced Energy Studies Boise State University BoiseID83725 United States Department of Mechanical and Biomedical Engineering Boise State University BoiseID83725 United States Idaho National Laboratory Idaho FallsID83415 United States A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University PhiladelphiaPA19104 United States Department of Chemistry and Chemical Biology Rutgers University PiscatawayNJ08854 United States

Triboelectric nanogenerators (TENGs) have gained recognition for their potential to convert mechanical energy into electrical energy, making them attractive for applications in healthcare, robotics, and human-device interfaces. However, many TENG devices rely on fluorinated polymers for high charge generation and involve complex fabrication processes, which limit their practicality and environmental sustainability. Here, we developed an eco-friendly composite of poly (vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (PVBVA) and Ti₃C₂Tₓ MXene for extrusion printing onto aluminum foil substrates, enabling the additive manufacturing of TENGs. Experimental results indicate that integrating 5.5 mg mL-1 of MXene (P-MX 5.5) into PVBVA resulted in a power density of 760 mW·m⁻², with simultaneous improvements in open-circuit voltage (129 %) and short-circuit current (250 %), demonstrating enhanced charge transfer efficiency. Beyond aluminum foil-based devices, we further explored the fully printed P-MX 5.5 TENG by utilizing silver ink electrodes, eliminating the need for aluminum foil. This fully printed, flexible TENG was successfully used for real-time human motion sensing, demonstrating its ability to detect activities such as walking, running, knee bending, and jumping. Collectively, our additively manufactured and sustainable PVBVA-MXene TENG composites, including both aluminum-based and fully printed versions, show promise for future energy harvesters, sensors, wearable electronics, healthcare, and robotic applications. © 2025

关键词： Aluminum foil

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Publisher Correction: Three-dimensional atomic mapping of ligands on palladium nanoparticles by atom probe tomography

引用

Nature communications 2021年第1期12卷 5521页

作者： Kyuseon Jang Se-Ho Kim Hosun Jun Chanwon Jung Jiwon Yu Sangheon Lee Pyuck-Pa Choi Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. Department of Microstructure Physics and Alloy Design Max-Planck-Institut für Eisenforschung GmbH Düsseldorf Germany. Department of Chemical Engineering and Materials Science Ewha Womans University Seoul Republic of Korea. Department of Chemical Engineering and Materials Science Ewha Womans University Seoul Republic of Korea. sang@ewha.ac.kr. Graduate Program in System Health Science and Engineering Ewha Womans University Seoul Republic of Korea. sang@ewha.ac.kr. Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Republic of Korea. p.choi@kaist.ac.kr.

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