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arXiv 2025年

作者： Anadón, Alberto Singh, Harjinder Díaz, Eva Le-Guen, Yann Hohlfeld, Julius Wilson, Richard B. Malinowski, Gregory Hehn, Michel Gorchon, Jon Université de Lorraine CNRS IJL NancyF-54000 France Department of Mechanical Engineering and Materials Science and Engineering Program University of California RiversideCA United States

Magneto-optical techniques have become essential tools in spintronics, enabling the investigation of spin dynamics in the ultrafast regime. A key challenge in this field has been to accurately isolate the contributions to magneto-optical signals of spin transport phenomena from the local magnetization dynamics. The contribution of transported and accumulated spins was long believed to be orders of magnitude smaller than that of the magnetization and thus previous approaches to disentangle these signals have relied on specific experimental designs, usually including thick metal layers. Here, we present experimental evidence demonstrating that the magneto-optical signal from ultrafast spin accumulations can, under certain conditions, be comparable to or even exceed that of the magnetic layer in a standard ultrafast demagnetization experiment. Our findings provide a new framework for accessing and isolating these spin accumulations, allowing for time and depth dependent probing of transported spin and/or orbital angular momentum. © 2025, CC BY.

关键词： Spin dynamics

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ROS Balance Autoregulating Core-Shell CeO_(2)@ZIF-8/Au Nanoplatform for Wound Repair

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Nano-Micro Letters 2024年第8期16卷 341-361页

作者： Xi Zhou Quan Zhou Zhaozhi He Yi Xiao Yan Liu Zhuohang Huang Yaoji Sun Jiawei Wang Zhengdong Zhao Xiaozhou Liu Bin Zhou Lei Ren Yu Sun Zhiwei Chen Xingcai Zhang The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Research Center of Biomedical Engineering of XiamenDepartment of BiomaterialsCollege of MaterialsXiamen UniversityXiamen 361005People’s Republic of China Department of Electronic Science Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance ResearchSchool of Electronic Science and EngineeringXiamen UniversityXiamen 361005People’s Republic of China John A Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Otorhinolaryngology Union Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022People’s Republic of China NO.1 Middle School Affiliated to Central China Normal University Wuhan 430223People’s Republic of China

Reactive oxygen species(ROS)plays important roles in living *** ROS is a double-edged sword,which can eliminate drug-resistant bacteria,but excessive levels can cause oxidative damage to cells.A core–shell nanozyme,Ce O_(2)@ZIF-8/Au,has been crafted,spontaneously activating both ROS generating and scavenging functions,achieving the multifaceted functions of eliminating bacteria,reducing inflammation,and promoting wound *** Au Nanoparticles(NPs)on the shell exhibit high-efficiency peroxidase-like activity,producing ROS to kill ***,the encapsulation of Ce O_(2) core within ZIF-8 provides a seal for temporarily limiting the superoxide dismutase and catalase-like activities of Ce O_(2) ***,as the ZIF-8 structure decomposes in the acidic microenvironment,the Ce O_(2) core is gradually released,exerting its ROS scavenging activity to eliminate excess ROS produced by the Au *** two functions automatically and continuously regulate the balance of ROS levels,ultimately achieving the function of killing bacteria,reducing inflammation,and promoting wound *** innovative ROS spontaneous regulators hold immense potential for revolutionizing the field of antibacterial agents and therapies.

关键词： Metal-organic framework(MOF) Reactive oxygen species(ROS) Cerium dioxide Au nanoparticles Wound healing

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一步秒级制备超薄多孔Janus膜及其在防水透气电子皮肤的应用（英文）

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science Bulletin 2025年第5期 712-721页

作者：倪宇峰李兵储成臻王少凡贾宇杰曹诗春 Rasoul Esmaeely Neisiany 何创龙陈硕游正伟 State Key Laboratory of Advanced Fiber Materials Institute of Functional Materials College of Materials Science and Engineering Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society) Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine Shanghai Key Laboratory of Lightweight Composite Donghua University College of Biological Science and Medical Engineering Donghua University Department of Materials and Polymer Engineering Faculty of Engineering Hakim Sabzevari University Biotechnology Centre Silesian University of Technology

It remains a challenge for a simple and scalable method to fabricate ultrathin porous Janus membranes for stretchable on-skin ***,we propose a one-step droplet spreading phase separation strategy to prepare an ultrathin and easily collected Janus thermoplastic polyurethane （TPU） membrane within *** metal-ion solvation structure mitigated migration kinetics to delay TPU solution demixing,promoting the further penetration of the coagulating ***,the developed membranes,with an average preparation rate of 25.2 cm2s-1,had a thickness of 5μm,and the water vapor transmission rate was determined to be 663 *** small pore layer having an average pore size of 1.7μm effectively blocked external liquid *** porous Janus TPU membrane coated by liquid metal served as a building block to develop a new generation of monolithic stretchable electronics with simultaneous high permeability and waterproofness.

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Enhanced Electrocatalytic Conversion of Co2 to Co Via Anon-Stoichiometric Zinc-Fluorine Amorphous Interface

SSRN

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SSRN 2024年

作者： Wu, Hsin-Chiao Lin, Chia-Chen Yang, Chu-Hsin Huang, Yu-Wei Yeh, Chen-Hao Chou, Yu-Jen Liu, Ta-Chung Department of Biomedical Engineering National Yang Ming Chiao Tung University Taipei112 Taiwan Department of Materials Science and Engineering Feng Chia University Taichung407 Taiwan Department of Mechanical Engineering National Taiwan University of Science and Technology Taipei106 Taiwan

Carbon dioxide reduction reaction (CO2RR) is considered a promising process that converts CO2 into value-added carbon chemicals in mild conditions to eliminate petrochemistry. Zinc and its derivatives are promising electrocatalysts for selective CO production due to their cost-effectiveness compared to noble electrocatalysts such as gold and silver. However, halogens have been only discussed in the context of their aqueous ionic forms as electrolytes, with scarcely any direct use as zinc-based electrocatalysts despite their potential benefits in tuning CO2RR activities. Herein, we proposed a fluorolytic sol-gel method to synthesize a zinc fluoride nanogel (nanoZnF2) electrocatalyst, demonstrating the capability of fluorine to change proton adsorption toward selectivity enhancement. The nanoZnF2 exhibited a CO faradaic efficiency of up to 82% at -1.05 V (vs. RHE). This marked a significant improvement over the maximum Faraday efficiency of 68% for bulk ZnF2 and 71% for nanoZnO. This enhancement was attributed to a non-stoichiometric atomic ratio of zinc to fluorine in an amorphous structure of an inherent material property, suppressing the hydrogen evolution at low potentials. This was highly associated with the fewer F atoms in the dangling bonds facilitating a limited amount but stable of *H intermediates from dissociated H₂O toward suppressed HER and *COOH affinity. © 2024, The Authors. All rights reserved.

关键词： Sol-gel process

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In vitro and in vivo evaluation of implantable bacterial-killing coatings based on host defense peptides and their synthetic mimics

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Journal of materials science & Technology 2021年第32期91卷 90-104页

作者： Yuxin Qian Shuai Deng Xue Wu Yunrui She Runhui Liu Haodong Lin State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Orthopedic Surgery Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China

Contact-killing antimicrobial coatings based on host defense peptides(HDPs) and their synthetic mimics have shown potential as powerful tools to combat implant-associated infections. Covalent modification of the antimicrobial surface has been utilized to prevent early-stage microbial infections owing to the less drug-leaching possibility that is beneficial to human health and the natural environment. Although considerable progress has been achieved in preparing contact-killing antimicrobial surfaces, discussions focusing on the in vitro and in vivo evaluations of these surfaces are limited. In this review, we summarized the established in vitro methods to simulate the practical interaction of microbes with the surrounding biological environment and the reported in vivo studies at different implant sites. We suggested that the in vivo specific site infection model is essential to gain a comprehensive understanding of these antimicrobial coatings in the preclinical stage, which can be established based on investigations performed using various in vitro assays and conventional non-specific site infection models. Overall, these precedent studies focusing on bacterial contact-killing coatings modified with HDPs and HDP mimics can be considered as critical to assess the surface antibacterial ability and to guide the future developments and applications of antimicrobial surfaces.

关键词： Contact-killing Antimicrobial surface HDPs HDP mimic Covalent binding

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Three-dimensional breast cancer tumor models based on natural hydrogels:a review

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2024年第9期25卷 736-755页

作者： Yan SHU Bing LI Hailin MA Jiaqi LIU Yuen Yee CHENG Xiangqin LI Tianqing LIU Chuwei YANG Xiao MA Kedong SONG State Key Laboratory of Fine Chemicals Dalian R&D Center for Stem Cell and Tissue EngineeringDalian University of TechnologyDalian116024China Institute for Biomedical Materials and Devices Faculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia Emergency Center The Second Hospital of Dalian Medical UniversityDalian116023China Department of Anesthesia The First Affiliated Hospital of Dalian Medical UniversityDalian116011China

Breast cancer is the most common cancer in women and one of the deadliest cancers *** to the distribution of tumor tissue,breast cancer can be divided into invasive and non-invasive *** cancer cells in invasive breast cancer pass through the breast and through the immune system or systemic circulation to different parts of the body,forming metastatic breast *** resistance and distant metastasis are the main causes of death from breast *** on breast cancer has attracted extensive attention from *** vitro construction of tumor models by tissue engineering methods is a common tool for studying cancer mechanisms and anticancer drug *** tumor microenvironment consists of cancer cells and various types of stromal cells,including fibroblasts,endothelial cells,mesenchymal cells,and immune cells embedded in the extracellular *** extracellular matrix contains fibrin proteins(such as types Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅵ,and Ⅹ collagen and elastin)and glycoproteins(such as proteoglycan,laminin,and fibronectin),which are involved in cell signaling and binding of growth *** current traditional two-dimensional(2D)tumor models are limited by the growth environment and often cannot accurately reproduce the heterogeneity and complexity of tumor tissues in ***,in recent years,research on three-dimensional(3D)tumor models has gradually increased,especially 3D bioprinting models with high precision and *** with a 2D model,the 3D environment can better simulate the complex extracellular matrix components and structures in the tumor ***-dimensional models are often used as a bridge between 2D cellular level experiments and animal *** matrix,gelatin,sodium alginate,and other natural materials are widely used in the construction of tumor models because of their excellent biocompatibility and non-immune ***,we review various natural scaffold materials and con

关键词： Breast cancer Tumor microenvironment 3D tumor model Decellularized extracellular matrix Natural scaffold materials

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Porous FeAl alloys via powder sintering:Phase transformation,microstructure and aqueous corrosion behavior

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Journal of materials science & Technology 2021年第27期86卷 64-69页

作者： Gang Chen Klaus-Dieter Liss Chao Chen Yuehui He Xuanhui Qu Peng Cao Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083PR China Materials and Engineering Science Program Guangdong Technion-Israel Institute of TechnologyShantouGuangdong515063PR China Technion-Israel Institute of Technology Haifa32000Israel School of Mechanical MaterialsMechatronic and Biomedical EngineeringFaculty of Engineering&Information SciencesUniversity of WollongongWollongongNSW2522Australia State Key Laboratory for Powder Metallurgy Central South UniversityChangsha410083PR China Department of Chemical and Materials Engineering The University of AucklandPrivate Bag 92019Auckland1142New Zealand MacDiarmid Institute of Advanced Materials and Nanotechnology Victoria University of WellingtonPO Box 600Wellington6140New Zealand

This study investigates the phase transformation and microstructure of porous Fe Al parts sintered from elemental powder mixtures using in-situ neutron diffraction and in-situ thermal dilatometry.A single B2 structured Fe Al phase was determined in the sintered Fe Al *** combined effects of the Kirkendall porosity,transient liquid phase,and phase transformations associated with powder sintering all contribute to the swelling phenomenon of the final sintered *** aqueous corrosion test indicates that the corrosion products include iron oxides in the porous Fe Al *** accumulation of corrosion products blocks the pore channel and decreases pore size and permeability over the soaking time.

关键词： Powder sintering Intermetallic Porous Corrosion Neutron diffraction

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Hierarchical Ceramic Nanofibrous Aerogels for Universal Passive Radiative Cooling

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Advanced Functional materials 2024年第52期34卷

作者： Lan, Pin-Hui Hwang, Ching-Wen Chen, Tai-Chi Wang, Tzu-Wei Chen, Hsuen-Li Wan, Dehui Institute of Biomedical Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Materials Science and Engineering National Taiwan University Taipei10617 Taiwan National Taiwan University Taipei10617 Taiwan

Solar-induced thermal challenges in buildings, cold chain logistics, and spacecrafts may be overcome by integrating passive radiative cooling (PRC) with aerogels having thermal insulation (TI). Herein, a universal radiative cooling silica aerogel (UCSA) is prepared through the simple regeneration and freeze-drying of commercial quartz fiber membranes. The optically engineered UCSA with a hybrid structure (silica nanofibers/microbeads) achieves remarkable solar reflectance (RS.E. = 98.1%) and atmospheric transparency window emittance (ΕATW = 92.1%) under Earth conditions, with a theoretical daytime cooling power of 103.3 W m−2. In the harsh space environment, it exhibits ultrahigh average solar reflectance (RS.E. = 99.1%) and broadband mid-infrared emittance (ΕMIR = 90%), achieving a cooling power of 354.1 W m−2. Compared to single-functional approaches, UCSA synergistically integrates the PRC and TI performance for excellent thermal management capability. Moreover, this ceramic aerogel can resist temperatures up to 830 °C, safeguarding building occupants and spacecraft electronics. Furthermore, UCSA passes environmental aging and thermal vacuum outgassing tests for long-term viability both on Earth and in space. Finally, a USCA-covered box achieves an average sub-ambient cooling of 18.6 °C when exposed to sunlight. In summary, UCSA opens a path for energy-efficient and sustainable cooling strategy with universal applications. © 2024 Wiley-VCH GmbH.

关键词： Radiative Cooling

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Label-free, in situ monitoring of viscoelastic properties of cellular monolayers via elastohydrodynamic phenomena

arXiv

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arXiv 2023年

作者： Guo, Tianzheng Zou, Xiaoyu Sundar, Shalini Jia, Xinqiao Dhong, Charles Department of Materials Science and Engineering University of Delaware NewarkDE United States Department of Biomedical Engineering University of Delaware NewarkDE United States

Recent advances recognize that the viscoelastic properties of epithelial structures play important roles in biology and disease modeling. However, accessing the viscoelastic properties of multicellular structures in mechanistic or drug-screening applications face challenges in repeatability, accuracy, and practical implementation. Here, we present a microfluidic platform that leverages elastohydrodynamic phenomena, sensed by graphene strain sensors, to measure the viscoelasticity of cellular monolayer in situ, without using labels or specialized equipment. We demonstrate platform utility with two systems: cell dissociation following trypsinization, where viscoelastic properties change over minutes, and an epithelial-to-mesenchymal transition, where changes occur over days. These cellular events could only be resolved with our platform’s higher signal-to-noise ratio: relaxation times of 14.5 ± 0.4 s-1 for intact epithelial monolayers versus 13.4 ± 15.0 s-1 in other platforms. By rapidly assessing combined contributions from cell stiffness and intercellular interactions, we anticipate that the platform will hasten translation of new mechanical biomarkers. © 2023, CC BY-NC-ND.

关键词： Monolayers

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Fluorescent carbon dots for labeling of bacteria: mechanism and prospects—a review

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Analytical and Bioanalytical Chemistry 2024年第17期416卷 3907-3921页

作者： Anand, Anisha Huang, Chih-Ching Lai, Jui-Yang Bano, Darakhshan Pardede, Helen Indah Hussain, Amina Saleem, Sehresh Unnikrishnan, Binesh Department of Biomedical Engineering Chang Gung University Taoyuan33302 Taiwan Department of Bioscience and Biotechnology National Taiwan Ocean University Keelung202301 Taiwan Center of Excellence for the Oceans National Taiwan Ocean University Keelung202301 Taiwan School of Pharmacy College of Pharmacy Kaohsiung Medical University Kaohsiung80708 Taiwan Department of Ophthalmology Chang Gung Memorial Hospital Taoyuan Linkou33305 Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Research Center for Chinese Herbal Medicine College of Human Ecology Chang Gung University of Science and Technology Taoyuan33303 Taiwan

The search for bacteria-labeling agents that are more efficient and less toxic compared to existing staining dyes is ongoing. Fluorescent quantum dots and carbon dots (CDs) have been extensively researched for various bioimaging applications. Priority is given to CDs due to several advantages, including lower toxicity, versatility in tuning their properties, and better photostability compared to metal-based quantum dots. Although significant progress is still needed to replace existing dyes with CDs for bacteria labeling, they offer promising potential for further improvement in efficiency. Surface charges and functional groups have been reported as decisive factors for bacterial discrimination and live/dead assays;however, a complete guideline for preparing CDs with optimum properties for efficient staining and predicting their labeling performance is lacking. In this review, we discuss the application of fluorescent CDs for bacterial labeling and the underlying mechanisms and principles. We primarily focus on the application and mechanism of CDs for Gram differentiation, live imaging, live/dead bacteria differentiation, bacterial viability testing, biofilm imaging, and the challenges associated with application of CDs. Based on proposed mechanisms of bacterial labeling and ambiguous results reported, we provide our view and guidelines for the researchers in this field to overcome the challenges associated with bacteria labeling using fluorescent CDs. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature 2024.

关键词： Bacteria

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