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3D Crumpled Ultrathin 1T MoS2 for Inkjet Printing of Mg-Ion Asymmetric Micro-supercapacitors (vol 14, pg 7308, 2020)

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ACS NANO 2020年第10期14卷 14247-14247页

作者： Shao, Yuanlong Fu, Jui-Han Cao, Zhen Song, Kepeng Sun, Ruofan Wan, Yi Shamim, Atif Cavallo, Luigi Han, Yu Kaner, Richard B. Tung, Vincent C. College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 People’s Republic of China Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Electrical Engineering Program Computer Electrical and Mathematical Sciences (CEMS) Division KAUST Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Department of Chemistry and Biochemistry Department of Materials Science and Engineering California NanoSystems Institute (CNSI) University of California Los Angeles Los Angeles California 90095 United States Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia

Metallic molybdenum disulfide (MoS2), e.g., 1T phase, is touted as a highly promising material for energy storage that already displays a great capacitive performance. However, due to its tendency to aggregate and restack, it remains a formidable challenge to assemble a high-performance electrode without scrambling the intrinsic structure. Here, we report an electrohydrodynamic-assisted fabrication of 3D crumpled MoS2 (c-MoS2) and its formation of an additive-free stable ink for scalable inkjet printing. The 3D c-MoS2 powders exhibited a high concentration of metallic 1T phase and an ultrathin structure. The aggregation-resistant properties of the 3D crumpled particles endow the electrodes with open space for electrolyte ion transport. Importantly, we experimentally discovered and theoretically validated that 3D 1T c-MoS2 enables an extended electrochemical stable working potential range and enhanced capacitive performance in a bivalent magnesium-ion aqueous electrolyte. With reduced graphene oxide (rGO) as the positive electrode material, we inkjet-printed 96 rigid asymmetric micro-supercapacitors (AMSCs) on a 4-in. Si/SiO2 wafer and 100 flexible AMSCs on photo paper. These AMSCs exhibited a wide stable working voltage of 1.75 V and excellent capacitance retention of 96% over 20 000 cycles for a single device. Our work highlights the promise of 3D layered materials as well-dispersed functional materials for large-scale printed flexible energy storage devices.

关键词： supercapacitors MoS2 printing technique Mg-ion microdevice

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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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Upconversion nonlinear structured illumination microscopy

arXiv

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arXiv 2020年

作者： Liu, Baolei Chen, Chaohao Di, Xiangjun Liao, Jiayan Wen, Shihui Su, Qian Peter Shan, Xuchen Xu, Zai-Quan Ju, Lining Arnold Wang, Fan Jin, Dayong Faculty of Science University of Technology Sydney SydneyNSW2007 Australia School of Mathematical and Physical Sciences Faculty of Science University of Technology Sydney UltimoNSW2007 Australia School of Biomedical Engineering Faculty of Engineering Charles Perkins Centre University of Sydney CamperdownNSW2006 Australia Heart Research Institute NewtownNSW2042 Australia UTS-SUStech Joint Research Centre for Biomedical Materials & Devices Department of Biomedical Engineering Southern University of Science and Technology Shenzhen China

Video-rate super-resolution imaging through biological tissue can visualize and track biomolecule interplays and transportations inside cellular organisms. Structured illumination microscopy allows for wide-field super resolution observation of biological samples but is limited by the strong absorption and scattering of light by biological tissues, which degrades its imaging resolution. Here we report a photon upconversion scheme using lanthanide-doped nanoparticles for wide-field super-resolution imaging through the biological transparent window, featured by near-infrared and low-irradiance nonlinear structured illumination. We demonstrate that the 976 nm excitation and 800 nm up-converted emission can mitigate the aberration. We found that the nonlinear response of upconversion emissions from single nanoparticles can effectively generate the required high spatial frequency components in Fourier domain. These strategies lead to a new modality in microscopy with a resolution of 130 nm, 1/7thof the excitation wavelength, and a frame rate of 1 fps. Copyright © 2020, The Authors. All rights reserved.

关键词： Infrared devices

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Bypassing the limit in volumetric imaging of mesoscale specimens

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Advanced Photonics 2019年第2期1卷 3-4页

作者： Chaohao Chen Zhen Liu Dayong Jin University of Technology Sydney Institute for Biomedical Materials and DevicesFaculty of ScienceUltimoNew South WalesAustralia Southern University of Science and Technology Department of Biomedical EngineeringShenzhenChina

The development of light-sheet microscopy(LSM)1,2 has revolutionized high-resolution imaging of biological organisms in three dimensions(3D)with minimal photodamage3 and high temporal resolution,4 therefore allowing long-term observation of biological processes.5,6 The key is to obtain information on subcellular events at both high spatial and temporal resolutions,but the spatial resolution of current LSM methods has been pixel-limited when each frame of the image is collected under a large field of view from an entire large-volume specimen.

关键词： processes. limit dimensions

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Magnetic skyrmion bundles and their current-driven dynamics

arXiv

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arXiv 2021年

作者： Tang, Jin Wu, Yaodong Wang, Weiwei Kong, Lingyao Lv, Boyao Wei, Wensen Zang, Jiadong Tian, Mingliang Du, Haifeng Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences University of Science and Technology of China Hefei230031 China School of Physics and Materials Engineering Hefei Normal University Hefei230601 China Institutes of Physical Science and Information Technology Anhui University Hefei230601 China School of Physics and Materials Science Anhui University Hefei230601 China Department of Physics and Astronomy University of New Hampshire DurhamNH03824 United States Materials Science Program University of New Hampshire DurhamNH03824 United States

Quantization of topological charges determines the various topological spin textures that are expected to play a key role in future spintronic devices. While the magnetic skyrmion with a unit topological charge Q = ±1 has been extensively studied, spin textures with other integer-valued Q have not been verified well so far. Here, we report the real-space image, creation, and manipulation of a type of multi-Q three-dimensional skyrmionic texture, where a circular spin spiral ties a bunch of skyrmion tubes. We define these objects as skyrmion bundles, and show they have arbitrarily integer values Q from negative up to at least 55 in our experiment. These textures behave as quasiparticles in dynamics for the collective motions driven by electric pulses. Similar to the skyrmion, skyrmion bundles with Q ≠ 0 exhibit the skyrmion Hall effects with a Hall angle of ~ 62°. Of particular interest, the skyrmion bundle with Q = 0 propagates collinearly with respect to the current flow without the skyrmion Hall effect. Our results open a new perspective for possible applications of multi-Q magnetic objects in future spintronic devices. © 2021, CC BY.

关键词： Textures

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Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions

arXiv

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arXiv 2025年

作者： Bi, Liya Wang, Zhe Balto, Krista Tao, Andrea R. Pascal, Tod A. Zhang, Yanning Figueroa, Joshua S. Li, Shaowei Department of Chemistry and Biochemistry University of California La Jolla San DiegoCA92093-0309 United States Program in Materials Science and Engineering University of California La Jolla San DiegoCA92093-0418 United States Department of Physics and Astronomy University of California IrvineCA92697-4575 United States Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu611731 China Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California La Jolla San DiegoCA92093-0448 United States

Isocyanide-metal binding is governed by σ-donation and π-back-bonding, which affects the energy of the isocyanide stretching mode—a characteristic probe for ligand-metal interactions. While extensive correlations exist between structure and spectroscopy in molecular isocyanide-metal systems, isocyanide interactions with metallic crystalline surfaces, where ligands often bind in various geometries, remain poorly understood. Conventional vibrational spectroscopies, such as infrared and Raman, lack the molecular-scale resolution needed to distinguish these inhomogeneous configurations. In contrast, inelastic electron tunneling spectroscopy with scanning tunneling microscopy (STM-IETS) enables direct visualization of ligand adsorption geometries and their vibrational signatures. Using STM-IETS, here we investigate an metal-adsorbed m-terphenyl isocyanide ligand and find that adsorption geometry on Cu(100) induces a significant shift in isocyanide stretching frequency, even greater than replacing Cu(100) with Ag(111). Density functional theory confirms this shift arises from atomic-scale variations in isocyanide-metal binding. This study elucidates how atomic-scale binding influences the vibrational signatures of isocyanide ligands—an often-overlooked factor in understanding isocyanide-metal interactions. © 2025, CC BY.

关键词： Vibrational spectroscopy

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In-situ electron microscopy study of non-volatile resistive switching in Mott insulator VO2

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Microscopy and Microanalysis 2021年第S1期27卷 2162-2164页

作者： Shaobo Cheng Min-Han Lee Xing Li Lorenzo Fratino Marcelo Rozenberg Ivan Schuller Yimei Zhu Department of Condensed Matter Physics and Materials Science Brookhaven National Laboratory Upton NY USA upton New York United States University of California-San Diego United States Key Laboratory of Material Physics School of Physics and Microelectronics Zhengzhou University Zhengzhou Henan P. R. China United States Laboratoire de Physique des Solides CNRS Université Paris-Sud Université Paris-Saclay Orsay France United States Materials Science and Engineering Program University of California-San Diego La Jolla CA USA United States Department of Condensed Matter Physics and Materials Science Brookhaven National Laboratory Upton NY USA United States

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Biocompatible polyelectrolyte microcapsules generated with magnetic water-in-water droplet microfluidics 23

Biocompatible polyelectrolyte microcapsules generated with m...

引用

23rd International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2019

作者： Navi, Maryam Kieda, Jennifer Abbasi, Niki Tsai, Scott S.H. Graduate Program in Biomedical Engineering Ryerson University Toronto Canada Department of Mechanical and Industrial Engineering Ryerson University Toronto Canada Kennan Research Center for Biomedical Science St. Michael's Hospital Toronto Canada -a partnership between Ryerson University St. Michael's Hospital Canada

ISBN: (纸本)9781733419000

We report an all-aqueous and biocompatible platform for the generation of polyelectrolyte microcapsules using magnetic water-in-water droplet microfluidics. We use a polymeric aqueous two-phase system to generate the droplets. To functionalize the droplets with paramagnetic properties, we add ferrofluid to the droplet phase, which also contains the positively charged polyelectrolyte. Utilizing a magnetic field, the magnetic droplets are then moved to a second phase which contains the negatively charged polyelectrolyte, where the polyelectrolytes meet at the interface of the droplet and form a shell. Such polyelectrolyte microcapsules have applications in drug delivery and cell mimicry. © 2019 CBMS-0001.

关键词： Drops

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Mitochondrial activation via calcium peroxide/carrageenan/soybean lecithin-derived polypyrrole phototherapeutic microparticles

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Colloids and Surfaces B: Biointerfaces 2025年 254卷 114787页

作者： Chuang, Sih-Chi Yu, Shih-An Hung, Pei-Chia Chuang, Andrew E.-Y. Liang, Jia-Wei Sun, Chia-Lu Rethi, Lekshmi Fang, Hsu-Wei Nguyen, Hieu Trung Tsai, Yao-Tung Weng, Pei-Wei Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan Doctoral Program of Biochemical and Biomedical Engineering National Taipei University of Technology Taipei10608 Taiwan Taipei Medical University Derived Company-Hsuan Chen Technology CO. LTD. New Taipei City22055 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University New Taipei City Taiwan Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei11696 Taiwan WELLCARE Health Care Supply Co. Ltd. Taipei Taiwan Department of Orthopedics and Trauma Faculty of Medicine University of Medicine and Pharmacy at Ho Chi Minh city Ho Chi Minh City700000 Viet Nam Department of Orthopaedic Surgery Tri-Service General Hospital National Defense Medical Center No. 325 Sec. 2 Chenggong Rd. Neihu Dist. Taipei City11490 Taiwan Division of Traumatology Department of Surgery Tri-Service General Hospital National Defense Medical Center No. 325 Sec. 2 Chenggong Rd. Neihu Dist. Taipei City11490 Taiwan Department of Orthopedics School of Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Orthopedics Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan

Mitochondria, often referred to as the "powerhouses" of eukaryotic cells, play a critical role in maintaining cellular homeostasis and supporting essential life functions, particularly in cell survival and apoptosis. This study introduces a composite formulation—combining carrageenan (Car), calcium peroxide (CaO2), and microparticles, derived from soybean oil lecithin, enhanced with photothermally active polypyrrole (PPy)—to create Car-Lec-PPy MP, aimed at promoting mitochondrial activation in cells. The investigation focuses on intercellular mitochondrial transfer and activation as a therapeutic strategy. The formulation seeks to stimulate mitochondrial biogenesis and enhance cellular resilience through targeted mitochondrial activation, leveraging the synergistic effects of near-infrared (NIR) therapy. In the in vivo experiment, phototherapeutic Car-Lec-PPy MP was administered to rodent muscle tissue. The results showed increased expression of heat-shock proteins and reduced oxidative stress in the treated muscle. Preliminary findings suggest that this approach not only boosts mitochondrial activity but also improves cell proliferation and survival, presenting significant potential for applications in regenerative medicine and cellular therapy. © 2025 Elsevier B.V.

关键词： Mitochondria

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Strain-programmable van der Waals magnetic tunnel junctions

Newton

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Newton 2025年

作者： John Cenker Dmitry Ovchinnikov Harvey Yang Daniel G. Chica Catherine Zhu Jiaqi Cai Geoffrey Diederich Zhaoyu Liu Xiaoyang Zhu Xavier Roy Ting Cao Matthew W. Daniels Jiun-Haw Chu Di Xiao Xiaodong Xu Department of Physics University of Washington Seattle WA 98195 USA Department of Chemistry Columbia University New York NY 10027 USA Intelligence Community Postdoctoral Research Fellowship Program University of Washington Seattle WA USA Department of Materials Science and Engineering University of Washington Seattle WA 98195 USA Physical Measurement Laboratory National Institute of Standards and Technology Gaithersburg MD 20899 USA

Magnetic tunnel junctions (MTJs) are foundational spintronics devices with applications ranging from stable magnetic memory to emerging stochastic computing schemes. Integrating van der Waals magnets into these devices could enable the realization of atomically thin MTJs with unique functionalities. Here, we demonstrate that the strain-tunable magnetism of the layered semiconductor CrSBr offers a new type of programmable MTJ operation. Switching the CrSBr tunnel barrier from antiferromagnetic (AFM) to ferromagnetic (FM) order by strain generates a giant tunneling magnetoresistance ratio without an external magnetic field. In addition to the purely FM and AFM states, we observe a variety of intermediate magnetic states consisting of both FM- and AFM-coupled layers. The layer-dependent magnetization of these states can be actively switched via the application of strain pulses. Alternatively, finely adjusting the static strain to minimize the energy difference between AFM and FM interlayer coupling results in stochastic switching with a strain-tunable sigmoidal response curve. Our results demonstrate new approaches for manipulating layered two-dimensional (2D) magnetism toward spintronic devices.

关键词： two-dimensional magnets van der Waals magnetic tunnel junctions spintronics strain tuning stochastic switching

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