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Preparation and Characterization of Nanopatterned Polycaprolactone/Cellulose Nanocrystal Composite Membranes for Cardiovascular Tissue engineering

Preparation and Characterization of Nanopatterned Polycaprol...

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IEEE International Conference on Nano/Molecular Medicine and engineering (NANOMED)

作者： Joseph Batta-Mpouma Gurshagan Kandhola Patrick Kuczwara Cody Chivers Woochan Kim Hanna Jensen Jangho Kim Morten Jensen Jin-Woo Kim Materials Science & Engineering Program Institute for Nanoscience & Engineering University of Arkansas Fayetteville Arkansas USA Engineering and Institute for Nanoscience & Engineering University of Arkansas Fayetteville Arkansas USA Institute for Nanoscience & Engineering University of Arkansas Fayetteville Arkansas USA Chonnam National University Gwangju Korea University of Arkansas Fayetteville Arkansas USA Materials Science & Engineering Program and Institute for Nanoscience & Engineering University of Arkansas Fayetteville Arkansas USA

ISBN: (纸本)9781665458573

Cardiac tissue exhibits very low regenerative capacity. Polymeric tissue scaffolds designed for repair of damaged cardiac tissue need to have the right balance of mechanical and biological characteristics that are necessary to withstand inherent stresses generated by cyclic contraction of cardiomyocytes and to promote cell attachment and growth. Polycaprolactone (PCL), a biocompatible polymer with low biodegradability, is a promising material to develop scaffolds for tissue engineering (TE). However, its high stiffness limits its use as a matrix for cardiovascular TE. In this work, we evaluated the physical, mechanical and surface properties of PCL and cellulose nanocrystal (CNC) composite membranes, imprinted with a three-dimensional groove-ridge pattern, and their potential for cardiomyocyte adhesion and growth. This work demonstrates the impact of (a) incorporating CNCs within the PCL matrix and (b) patterning the membrane, on the surface roughness, wettability, and mechanical properties of composites, with an aim to alleviate the limitations of pure PCL scaffolds for cardiac TE applications.

关键词： Cardiac tissue Young's modulus Nanocrystals Adhesives Tissue engineering Maintenance engineering Biomembranes

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Tuning the Electronic Property of Reconstructed Atomic Ni-CuO Cluster Supported on N/O-C for Electrocatalytic Oxygen Evolution

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Advanced science 2024年第22期11卷 e2310181页

作者： Li, Xinran Liu, Yang-Yi Li, Cheng Xue, Huaiguo Chen, Songqing Xu, Qiang Pang, Huan School of Chemistry and Chemical Engineering Yangzhou University Jiangsu Yangzhou 225009 China Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials (SKLPM) Academy for Advanced Interdisciplinary Studies SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory (SKAEM-JIL) and Department of Chemistry Southern University of Science and Technology (SUSTech) Guangdong Shenzhen 518055 China School of Electrical Engineering Engineering Technology Research Center of Optoelectronic Technology Appliance Tongling University Anhui Tongling 244061 China Hefei Comprehensive National Science Center (Anhui Energy Laboratory) Anhui Hefei 230051 China

Electrochemical activation usually accompanies in situ atom rearrangement forming new catalytic sites with higher activity due to reconstructed atomic clusters or amorphous phases with abundant dangling bonds, vacancies, and defects. By harnessing the pre-catalytic process of reconstruction, a multilevel structure of CuNi alloy nanoparticles encapsulated in N-doped carbon (CuNi nanoalloy@N/C) transforms into a highly active compound of Ni-doped CuO nanocluster supported on (N/O-C) co-doped C. Both the exposure of accessible active sites and the activity of individual active sites are greatly improved after the pre-catalytic reconstruction. Manipulating the Cu/Ni ratios of CuNi nanoalloy@N/C can tailor the electronic property and d-band center of the high-active compound, which greatly optimizes the energetics of oxygen evolution reaction (OER) intermediates. This interplay among Cu, Ni, C, N, and O modifies the interface, triggers the active sites, and regulates the work functions, thereby realizing a synergistic boost in OER. © 2024 The Authors. Advanced science published by Wiley-VCH GmbH.

关键词： electrocatalysis nanoalloy pre-catalyst single atom

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Artificial Magnetic Tripod Ice

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Physical Review Letters 2023年第12期131卷 126701-126701页

作者： Xiaoyu Zhang Ioan-Augustin Chioar Grant Fitez Anthony Hurben Michael Saccone Nicholas S. Bingham Justin Ramberger Chris Leighton Cristiano Nisoli Peter Schiffer Department of Applied Physics Yale University New Haven Connecticut 06511 USA Department of Physics Yale University New Haven Connecticut 06511 USA Theoretical Division and Center for Nonlinear Studies Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Department of Chemical Engineering and Materials Science University of Minnesota Minneapolis Minnesota 55455 USA

We study the collective behavior of interacting arrays of nanomagnetic tripods. These objects have six discrete moment states, in contrast to the usual two states of an Ising-like moment. Our experimental data demonstrate that triangular lattice arrays form a “tripod ice” that exhibits charge ordering among the effective vertex magnetic charges, in direct analogy to artificial kagome spin ice. The results indicate that the interacting tripods have effective moments that act as emergent local variables, with strong connections to the well-studied Potts and clock models. In addition, the tripod moments display a tendency toward a nearest neighbor alignment in our thermalized samples that separates this system from kagome spin ice. Our results open a path toward the study of the collective behavior of nonbinary moments that is unavailable in other physical systems.

关键词： Frustrated magnetism Magnetism Spin ice

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An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells

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science Bulletin 2021年第14期66卷 1419-1428,M0004页

作者： Chang Liu Lei Huang Xianyong Zhou Xingzhu Wang Jianxi Yao Zhike Liu Shengzhong Frank Liu Wanli Ma Baomin Xu Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Energy Conversion and Storage Technologies(Southern University of Science and Technology) Ministry of EducationShenzhen 518055China Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education) Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Laborartory for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Surface and grain boundary defects in halide perovskite solar cells are highly detrimental,reducing efficiencies and *** halide anion and organic cation defects usually aggravate ion diffusion and material degradation on the surfaces and at the grain boundaries of perovskite *** this study,we employ an in-situ green method utilizing nontoxic cetyltrimethylammonium chloride(CTAC)and isopropanol(IPA)as anti-solvents to effectively passivate both surface and grain boundary defects in hybrid *** vacancies can be readily passivated by the chloride group due to its high electronegativity,and cation defects can be synchronously passivated by the more stable cetyltrimethylammonium *** results show that the charge trap density was significantly reduced,while the carrier recombination lifetime was markedly *** a result,the power conversion efficiency of the cell can reach 23.4%with this in-situ green *** addition,the device retains 85%of its original power conversion efficiency after 600 h of operation under illumination,showing that the stability of perovskite solar cells is improved with this in-situ passivation *** work may provide a green and effective route to improve both the stability and efficiency of perovskite solar cells.

关键词： Perovskite solar cells In-situ defect passivation Green anti-solvent

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ABACUS: An Electronic Structure Analysis Package for the AI Era

arXiv

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arXiv 2025年

作者： Zhou, Weiqing Zheng, Daye Liu, Qianrui Lu, Denghui Liu, Yu Lin, Peize Huang, Yike Peng, Xingliang Bao, Jie J. Cai, Chun Jin, Zuxin Wu, Jing Zhang, Haochong Jin, Gan Ji, Yuyang Shen, Zhenxiong Liu, Xiaohui Sun, Liang Cao, Yu Sun, Menglin Liu, Jianchuan Chen, Tao Liu, Renxi Li, Yuanbo Han, Haozhi Liang, Xinyuan Bao, Taoni Chen, Nuo Ren, Hongxu Zhang, Xiaoyang Liu, Zhaoqing Fu, Yiwei Liu, Maochang Li, Zhuoyuan Wen, Tongqi Tang, Zechen Xu, Yong Duan, Wenhui Wang, Xiaoyang Gu, Qiangqiang Dai, Fu-Zhi Zheng, Qijing Zhao, Jin Zhang, Yuzhi Ou, Qi Jiang, Hong Liu, Shi Xu, Ben Xu, Shenzhen Ren, Xinguo He, Lixin Zhang, Linfeng Chen, Mohan AI for Science Institute Beijing100080 China HEDPS CAPT School of Physics College of Engineering Peking University Beijing100871 China College of Engineering Peking University Beijing100871 China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Hefei230026 China Key Laboratory of Quantum Information University of Science and Technology of China Hefei230026 China Supercomputing Center University of Science and Technology of China Anhui Hefei230026 China Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Materials Science and Engineering Peking University Beijing100871 China School of Electrical Engineering and Electronic Information Xihua University Chengdu610039 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China College of Chemistry and Molecular Engineering Peking University Beijing100871 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi’an Jiaotong University Shaanxi Xi’an710049 China Suzhou Academy of Xi’an Jiaotong University Jiangsu Suzhou215123 China Center for Structural Materials Department of Mechanical Engineering The University of Hong Kong Hong Kong The University of Hong Kong Shenzhen China State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Frontier Science Center for Quantum Information Beijing China Saitama Wako351-0198 Japan Institute for Advanced Study Tsinghua University Beijing100084 China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Fenghao East Road 2 Beijing100094 China School of Artificial Intelligence and Data Science University of Science and Technology of China Hefei230026 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Department of Physics University of Science and

ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software for first-principles electronic structure calculations and molecular dynamics simulations. It mainly features density functional theory (DFT) and is compatible with both plane-wave basis sets and numerical atomic orbital basis sets. ABACUS serves as a platform that facilitates the integration of various electronic structure methods, such as Kohn-Sham DFT, stochastic DFT, orbital-free DFT, and real-time time-dependent DFT, etc. In addition, with the aid of high-performance computing, ABACUS is designed to perform efficiently and provide massive amounts of first-principles data for generating general-purpose machine learning potentials, such as DPA models. Furthermore, ABACUS serves as an electronic structure platform that interfaces with several AI-assisted algorithms and packages, such as DeePKS-kit, DeePMD, DP-GEN, DeepH, DeePTB, etc. Copyright © 2025, The Authors. All rights reserved.

关键词： Stochastic systems

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Change in Magnetic Order in NiPS3 Single Crystals Induced by a Molecular Intercalation

arXiv

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arXiv 2024年

作者： Chakraborty, Nirman Harchol, Adi Abu-Hariri, Azhar Yadav, Rajesh Kumar Dawod, Muhamed Gaonkar, Diksha Prabhu Sharma, Kusha Eyal, Anna Amouyal, Yaron Naveh, Doron Lifshitz, Efrat Schulich Faculty of Chemistry Solid State Institute Russel Berrie Nanotechnology Institute Grand Program for Energy the Helen Diller Quantum Center Technion-Israel Institute of Technology Haifa3200003 Israel Faculty of Engineering Bar-Ilan University Ramat-Gan5290002 Israel Institute of Nanotechnology and Advanced Materials Bar-Ilan University Ramat-Gan5290002 Israel Department of Materials Science and Engineering Technion-Israel Institute of Technology Haifa3200003 Israel Department of Physics Technion Haifa3200003 Israel

Intercalation is a robust method for tuning the physical properties of a vast number of van der Waals (vdW) materials. However, the prospects of using intercalation to modify magnetism in vdWs systems and the associated mechanisms have not been investigated adequately. In this work, we modulate magnetic order in an XY antiferromagnet NiPS3 single crystals by introducing pyridine molecules into the vdW’s gap under different thermal conditions. X-ray diffraction measurements indicated pronounced changes in the lattice parameter beta (β), while magnetization measurements at in-plane and out-of-plane configurations exposed reversal trends in the crystals’ Néel temperatures through intercalation/de-intercalation processes. The changes in magnetic ordering were also supported by three-dimensional thermal diffusivity experiments. The preferred orientation of the pyridine dipoles within vdW gaps was deciphered via polarized Raman spectroscopy. The results highlight the relation between the preferential alignment of the intercalants, thermal transport, and crystallographic disorder along with the modulation of anisotropy in the magnetic order. The theoretical concept of double-exchange interaction in NiPS3 was employed to explain the intercalation-induced magnetic ordering. The study uncovers the merit of intercalation as a foundation for spin switches and spin transistors in advanced quantum devices. © 2024, CC BY-NC-SA.

关键词： Van der Waals forces

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Using System Dynamics to Understand Long-Term Impact of Sustainable Mobility Policies: An Analysis Pre- and Post-COVID-19 Pandemic

SSRN

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SSRN 2022年

作者： Fontoura, Wlisses Bonela Radzicki, Michael J. Ribeiro, Glaydston Mattos Transportation Engineering Program Federal University of Rio de Janeiro Rio de Janeiro Brazil Social Science & Policy Studies Department Worcester Polytechnic Institute WorcesterMA United States

The current urban mobility pattern in many cities around the world is the result of disorderly urban growth, favoring car trips and intensifying the urban sprawl. In these cases, transportation planning is fundamental for detecting, diagnosing, and anticipating problems in urban transport systems. In addition to planning, governments must develop sustainable mobility policies to adapt transport capacity to existing and future travel demand. In this context, this study aims to develop a strategy support model, using System Dynamics, to verify the effects of sustainable transport policies in urban transport systems, focusing on congestion and air pollution. In addition, it is carried out a case study in Rio de Janeiro in two realities: pre- and post-pandemic. The results highlight the importance of sustainable mobility policies to reduce urban transport externalities. More specifically, the results highlight the efficiency of encouraging high-capacity public transport, followed by car ownership control. © 2022, The Authors. All rights reserved.

关键词： Urban growth

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Indium Tin Oxide Coated D-Shape Fiber as a Saturable Absorber for Generating a Dark Pulse Mode-Locked Laser

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Chinese Physics Letters 2020年第5期37卷 51-54页

作者： B.Nizamani S.Salam A.A.A.Jafry N.M.Zahir N.Jurami M.I.M.Abdul Khudus A.Shuhaimi E.Hanafi S.W.Harun Photonics Engineering Laboratory Department of Electrical EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Faculty of Information Technology Imam Ja'afar Al-Sadiq UniversityBaghdadIraq Department of Physics Faculty of ScienceUniversiti Teknologi Malaysia81310 SkudaiJohorMalaysia Department of Physics Faculty of ScienceUniversity of Malaya50603 Kuala LumpurMalaysia Low-Dimensional Materials Research Center Department of PhysicsFaculty of ScienceUniversity of Malaya50603 Kuala LurmpurMalaysia Department of Engineering Faculty of Vocational StudiesAirlangga UniversitySurabayaIndonesia

A dark pulse mode-locked laser is experimentally demonstrated using the indium tin oxide(ITO)coated Dshape fiber as a saturable absorber(SA).Using the polishing wheel technique,a D-shape single mode fiber was fabricated.A 60-nm-thick layer of ITO was deposited over the D-shape fiber using the electron beam deposition *** SA has a saturation intensity of 40.32 MW/cm^2 and a modulation depth of 3.5%.A stable dark pulse mode-locked laser was observed at a central wavelength of 1559.4 nm with repetition rate 0.98 MHz,pulse width 370 ns and signal-to-noise ratio 61 dB.

关键词： fiber polishing mode

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Evolution of Electronic and Magnetic Properties in Topological Semimetal SmSbxTe2-x

arXiv

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arXiv 2022年

作者： Pandey, Krishna Basnet, Rabindra Wang, Jian Da, Bo Hu, Jin Materials Science and Engineering Program Institute for Nanoscience and Engineering University of Arkansas FayettevilleAR72701 United States Department of Physics University of Arkansas FayettevilleAR72701 United States Department of Chemistry Wichita State University WichitaKS67260 United States Research and Services Division of Materials Data and Integrated System National Institute for Materials Science 1-1 Namiki Ibaraki Tsukuba305-0044 Japan

The ZrSiS-type materials have attracted intensive attention due to the existence of various topological fermions. The magnetic version of the ZrSiS-type materials, LnSbTe (Ln = lanthanides), is an ideal candidate to explore novel exotic states due to the interaction between magnetism and topology. In this work, we report the experimental study on structural, magnetic, thermodynamic, and electronic properties for SmSbxTe2-xwith various Sb content. The revealed evolutions of these properties with tuning the compositions would provide useful insights for the fundamental topological physics and the future applications. © 2022, CC BY.

关键词： Electronic properties

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Field-Induced Criticality in YbCu4Au

arXiv

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arXiv 2024年

作者： Taniguchi, Takanori Osato, Kotaro Okabe, Hirotaka Kitazawa, Takafumi Kawamata, Masahiro Hashimoto, Shota Ikeda, Yoichi Nambu, Yusuke Sari, Dita Puspita Watanabe, Isao Nakamura, Jumpei G. Koda, Akihiro Gouchi, Jun Uwatoko, Yoshiya Kittaka, Shunichiro Sakakibara, Toshiro Mizumaki, Masaichiro Kawamura, Naomi Yamanaka, Takayoshi Hiraki, Koichi Sasaki, Takahiko Fujita, Masaki Institute for Materials Research Tohoku University Sendai980-8577 Japan Department of Physics Tohoku University Sendai980-8578 Japan Organization for Advanced Studies Tohoku University Sendai980-8577 Japan FOREST Japan Science and Technology Agency Kawaguchi Saitama332-0012 Japan Innovative Global Program College of Engineering Shibaura Institute of Technology Saitama337-8570 Japan Nuclear Structure Research Group Nishina Center for Accelerator-Based Science RIKEN Wako Saitama351-0198 Japan Institute of Materials Structure Science High-Energy Accelerator Research Organization Tsukuba305-0801 Japan The Institute for Solid State Physics The University of Tokyo Kashiwa Chiba277-8581 Japan Department of Physics Faculty of Science and Engineering Chuo University Tokyo112-8551 Japan Faculty of Science Kumamoto University 2-39-1 Kurokami Chuou-ku Kumamoto860-8555 Japan Japan Synchrotron Radiation Research Institute Sayo Hyogo679-5148 Japan Integrated Center for Science and Humanities Fukushima Medical University Fukushima960-1295 Japan

YbCu4Au is a unique material exhibiting multiple quantum fluctuations simultaneously. In this study, we investigated the field-induced criticality in YbCu4Au, based on comprehensive micro and macro measurements, including powder Xray diffraction (XRD), neutron powder diffraction (NPD), nuclear magnetic resonance, magnetization, resistivity, specific heat, muon spin rotation relaxation (μSR), and X-ray absorption spectroscopy (XAS). Single crystals of YbCu4Au were grown, and their crystal structure was determined using XRD, and NPD measurements. Magnetic successive transitions were observed below 1 T by specific heat, resistivity, NPD, and μSR measurements. XAS measurements further indicate that the valence of Yb ions (+2.93) remained unchanged above 2 T. Moreover, the change in quadrupole frequency observed in the previous study is attributable to the electric quadrupole, as the expected value of the electric quadrupole was finite under magnetic fields [S. Wada et al., Journal o f Physics: Condensed Matter, 20, 175201 (2008).]. These experimental results suggest that YbCu4Au exhibited bicritical behavior near 1 T, arising from the competition between RKKY interaction, accounting for the magnetic phases, and the Zeeman effect. © 2024, CC BY-NC-SA.

关键词： X ray absorption spectroscopy

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