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MXene-Based Elastomer Mimetic StretchableSensors: Design, Properties, and Applications

Nano-Micro Letters 2024年第7期16卷 295-342页

作者： Poushali Das Parham Khoshbakht Marvi Sayan Ganguly Xiaowu(Shirley)Tang Bo Wang Seshasai Srinivasan Amin Reza Rajabzadeh Andreas Rosenkranz School of Biomedical Engineering McMaster University1280 Main Street WestHamiltonON L8S 4L8Canada Department of Chemistry and Waterloo Institute for Nanotechnology(WIN) University of Waterloo200 University Ave WestWaterlooONCanada Centre for Eye and Vision Research(CEVR) 17W Hong Kong Science ParkShatinHong KongPeople’s Republic of China Chair of Functional Materials Department of Materials Science and EngineeringSaarland UniversitySaarbruckenGermany W Booth School of Engineering Practice and Technology McMaster University1280 Main Street WestHamiltonON L8S 4L7Canada Department for Chemical Engineering Biotechnology and MaterialsUniversity of ChileSantiagoChile

Flexible sensors based on MXene-polymer composites are highly prospective for next-generation wearable electronics used in human-machine *** of the motivating factors behind the progress of flexible sensors is the steady arrival of new conductive ***,a new family of 2D nanomaterials,have been draw-ing attention since the last decade due to their high electronic conduc-tivity,processability,mechanical robustness and chemical *** this review,we encompass the fabrication of MXene-based polymeric nanocomposites,their structure-property relationship,and applications in the flexible sensor ***,our discussion is not only lim-ited to sensor design,their mechanism,and various modes of sensing platform,but also their future perspective and market throughout the *** our article,we intend to fortify the bond between flexible matrices and MXenes thus promoting the swift advancement of flexible MXene-sensors for wearable technologies.

关键词： Flexible sensor 2D nanomaterials MXene Wearable and conductive Applications

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Cr-modified CuAlBe shape memory alloy: Role of microstructure, thermodynamic parameters, superelasticity, dissipated energy and corrosion resistance

Journal of Alloys and Metallurgical Systems

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Journal of Alloys and Metallurgical Systems 2024年 7卷

作者： Silva, David D.S. Candido, Gemierson V.M. Alves, Ricardo F. Dias, Elisabeth A.M.G.S. Oliveira, Danniel F. Federal University of São Carlos Graduate Program in Materials Science and Engineering SP São Carlos13565-905 Brazil Colorado School of Mines George S. Ansell Department of Metallurgical and Materials Engineering GoldenCO80401 United States Federal University of Paraíba Graduate Program in Mechanical Engineering PB João Pessoa58051-900 Brazil Federal University of Rio Grande do Norte Graduate Program in Materials Science and Engineering RN Natal59078-970 Brazil Federal University of Paraíba Graduate Program in Materials Science and Engineering PB João Pessoa58051-900 Brazil

This study reports the effects of Cr addition on the microstructure, superelasticity and corrosion resistance improvement of CuAlBe shape memory alloy. Analysis via structural, morphological, thermal, mechanical and electrochemical characterizations were performed. The analyses revealed austenite as the stable phase at room temperature for all samples. The increase in the Cr content caused a slight increase in the recovery rate and dissipated energy. Electrochemical results demonstrate that a small addition of Cr (0.1–0.3 wt%) increase the corrosion resistance due the decreases of the corrosion current density and increase of the corrosion potential. © 2024 The Authors

关键词： Corrosion resistance

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A plastic FeNi-based bulk metallic glass and its deformation behavior

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Journal of materials science & Technology 2021年第17期76卷 20-32页

作者： Jing Zhou Qianqian Wang Qiaoshi Zeng Kuibo Yin ing Wang Junhua Luan Litao Sun Baolong Shen School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing211189China SEU-FEI Nano-Pico Center Key Laboratory ofMEMS of Ministry of EducationSoutheast UniversityNanjing210096China Center for Advanced Structural Materials Department of Mechanical and Biomedical EngineeringCollege of Science and EngineeringCity University of Hong KongKowloonHong KongChina Institute of Massive Amorphous Metal Science China University of Mining and TechnologyXuzhou221116China

The strength and plasticity of Fe_(39)Ni_(39)B_(12.82)Si_(2.75)Nb_(2.3)P_(4.13)bulk metallic glass(BMG)are improved simultaneously by modulating atomic-scale structure through fluxing *** compression strength increases from 3074 to 4220 MPa,and the plastic strain is enlarged from 10.7%to more than 50%.The increased mechanical properties of the fluxed Fe Ni BSi Nb P BMG originate from the optimization of atomic-scale *** icosahedral-like clusters(ILCs)and crystal-like clusters(CLCs)are found in this Fe Ni-based BMG with fluxing treatment,and the ILCs are usually surrounded by ***,phase separation and a sandwich-like heterogeneous structure of SB are also observed during deformation,indicating the multiscale deformation mechanism and a stable shear-band *** unique"ILC surrounded by CLCs"structure and phase separation lead to a stable plastic deformation process with strong interactions of multiple shear bands,thereby the improved plasticity and *** work provides useful guidelines to develop strong and plastic Fe-based BMGs from a structural aspect.

关键词： FeNi-based BMG Plasticity Strength Structural heterogeneity Shear bands

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Estimation of In-Vivo Mechanical Properties of Aortic Wall in Left Ventricular Hypertrophy Patients

Estimation of In-Vivo Mechanical Properties of Aortic Wall i...

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International Conference on biomedical engineering and Applications (ICBEA)

作者： Wei Wen Ng Wan Naimah Wan Ab Naim Yih Miin Liew Bee Ting Chan Department of Mechanical Materials and Manufacturing Engineering Faculty of Science and Engineering University of Nottingham Malaysia Semenyih Malaysia FN Teguh Jaya Enterprise Kota Bharu Malaysia Department of Biomedical Engineering Faculty of Engineering Universiti Malaya Kuala Lumpur Malaysia

ISBN: (数字)9798350375299

ISBN: (纸本)9798350375305

Aortic wall properties such as aortic stiffness has emerged as a good tool for risk stratification because it has been linked to increased risk of heart disease. Thus, this preliminary study aims to estimate the in-vivo aortic wall properties between healthy and hypertrophy heart disease patients. Cine magnetic resonance (CMR) images of six human subjects i.e. two healthy subjects, two hypertrophy cardiomyopathy (HCM) and two hypertensive heart disease (HHD) patients were obtained. Based on the CMR images, aortic wall deformation at the ascending, arch and descending aorta were acquired at both systolic and diastolic phases. The stress and strain were then calculated and Mooney-Rivlin and Ogden hyperelastic material models were adopted to estimate the material constants at the respective regions in both phases. All the subjects were further categorized into two age groups to compare the effects of aging. Our results show that five parameters Mooney-Rivlin model has better fit of stress-strain data while the aortic wall stress is most prominent in the ascending aorta region. The greatest systolic aortic stress at the ascending aorta was found in HHD patients (238.17 kPa) followed by HCM patients (173.61 kPa) and lowest in healthy subjects (141.06 kPa). For aortic strain, an inverse trend was observed among the subjects. The older age group demonstrated a smaller aortic strain (22.60%) compared to the slightly younger age group (38.73%). This study shows that the estimated aortic wall stiffness in HHD and HCM are greater than the healthy subjects while the effect of aging is more prominent on aortic wall stiffness.

关键词： Heart Deformation Magnetic resonance Estimation Aging Market research Data models Stress Strain Diseases

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Alloyed nanostructures integrated metal-phenolic nanoplatform for synergistic wound disinfection and revascularization

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Bioactive materials 2022年第10期7卷 95-106页

作者： Yi Xie Shengqiu Chen Xu Peng Xiaoling Wang Zhiwei Wei Joseph J.Richardson Kang Liang Hirotaka Ejima Junling Guo Changsheng Zhao College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduSichuan610065China BMI Center for Biomass Materials and Nanointerfaces College of Biomass Science and EngineeringSichuan UniverisityChengduSichuan610065China Laboratory Animal Center Sichuan UniversityChengduSichuan610065China School of Chemical Engineering Graduate School of Biomedical Engineeringand Australian Centre for NanoMedicineUniversity of New South WalesSydneyNSW2052Australia Department of Materials Engineering School of EngineeringThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo113􀀀8656Japan Bioproducts Institute Departments of Chemical and Biological EngineeringThe University of British ColumbiaVancouverBCV6T 1Z4Canada School of Chemical Engineering Sichuan UniversityChengduSichuan610065China

New materials for combating bacteria-caused infection and promoting the formation of microvascular networks during wound healing are of vital *** antibiotics can be used to prevent infection,treatments that can disinfect and accelerate wound healing are ***,we engineer a coating that is both highly compatible with current wound dressing substrates and capable of simultaneously disinfecting and revascularizing wounds using a metal-phenolic nanoplatform containing an alloyed nanostructured architecture(Ag@Cu-MPNNC).The alloyed nanostructure is formed by the spontaneous co-reduction and catalytic disproportionation reaction of multiple metal ions on a foundation metal-phenolic supramolecular *** synergistic presence of metals greatly improves the antibacterial activity against both Gram-negative and Gram-positive pathogenic bacteria,while demonstrating negligible cytotoxicity to normal *** infected rat models,the Ag@Cu-MPNNC could kill bacteria efficiently,promoting revascularization and accelerate wound closure with no adverse side effects in infected in vivo *** other words,this material acts as a combination therapy by inhibiting bacterial invasion and modulating bio-nano interactions in the wound.

关键词： Metal-phenolic network Wound healing Antibacterial activity Revascularization

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A probabilistic reduced-order modeling framework for patient-specific cardio-mechanical analysis

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Computers in Biology and Medicine 2025年 190卷 109983-109983页

作者： Willems, Robin Förster, Peter Schöps, Sebastian van der Sluis, Olaf Verhoosel, Clemens V. Department of Mechanical Engineering Energy Technology and Fluid Dynamics Eindhoven University of Technology Netherlands Department of Biomedical Engineering Cardiovascular Biomechanics Eindhoven University of Technology Netherlands Department of Mathematics and Computer Science Computational Science Eindhoven University of Technology Netherlands Department of Mechanical Engineering Mechanics of Materials Eindhoven University of Technology Netherlands Department of Electrical Engineering and Information Technology Computational Electromagnetics Technical University of Darmstadt Germany

Cardio-mechanical models can be used to support clinical decision-making. Unfortunately, the substantial computational effort involved in many cardiac models hinders their application in the clinic, despite the fact that they may provide valuable information. In this work, we present a probabilistic reduced-order modeling (ROM) framework to dramatically reduce the computational effort of such models while providing a credibility interval. In the online stage, a fast-to-evaluate generalized one-fiber model is considered. This generalized one-fiber model incorporates correction factors to emulate patient-specific attributes, such as local geometry variations. In the offline stage, Bayesian inference is used to calibrate these correction factors on training data generated using a full-order isogeometric cardiac model (FOM). A Gaussian process is used in the online stage to predict the correction factors for geometries that are not in the training data. The proposed framework is demonstrated using two examples. The first example considers idealized left-ventricle geometries, for which the behavior of the ROM framework can be studied in detail. In the second example, the ROM framework is applied to scan-based geometries, based on which the application of the ROM framework in the clinical setting is discussed. The results for the two examples convey that the ROM framework can provide accurate online predictions, provided that adequate FOM training data is available. The uncertainty bands provided by the ROM framework give insight into the trustworthiness of its results. Large uncertainty bands can be considered as an indicator for the further population of the training data set. © 2025 The Authors

关键词： Cardiac mechanics Reduced-order modeling Gaussian processes Bayesian inference Patient-specific analysis One-fiber model Isogeometric analysis

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Grating Coupled Attachment of Optical Fiber Arrays for in situ Photonics Experimentation

Grating Coupled Attachment of Optical Fiber Arrays for in si...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Arnold, Kellen P. Slaby, Joel B. Dattilo, Hannah M. Kaylor, C. Alex Schrimpf, Ronald D. Fleetwood, Daniel M. Ralph, Stephen E. Reed, Robert Weiss, Sharon M. Interdisciplinary Materials Science Program Vanderbilt University 2201 West End Ave NashvilleTN37235 United States School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332 United States Department of Electrical and Computer Engineering Vanderbilt University 2201 West End Ave NashvilleTN37235 United States

We report a simple, vacuum-compatible fiber attach process for in situ study of grating-coupled photonic devices. The robustness of this technique is demonstrated on grating-coupled waveguides exposed to multiple X-ra... 详细信息

ISBN: (纸本)9781957171395

关键词： X ray lasers

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Low-Impact Nanocomposite Packaging: Cu@Nanocellulose-Fortified Chitosan/PVA/Honey Bioactive Film for Strawberry Preservation

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Food and Bioprocess Technology 2025年 1-18页

作者： G. C., Rajendra Bahadur Awasthi, Ganesh Prasad Panthi, Khim Prasad Shahi, Dikpal Kumar Bohara, Khagendra Prasad Sharma, Motee Lal Tiwari, Arjun Prasad Kalauni, Surya Kant Yu, Changho Li, Wei Joshi, Mahesh Kumar Central Department of Chemistry Tribhuvan University Kirtipur Nepal Butwal Multiple Campus Tribhuvan University Butwal Nepal Division of Convergence Technology Engineering Jeonbuk National University Jeonju Republic of Korea Center for Biomedical Engineering and Science Department of Mechanical Engineering and Engineering Science University of North Carolina at Charlotte Charlotte USA Department of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR) Jeonbuk National University Jeonju Republic of Korea School of Materials Science and Engineering Liaocheng University Liaocheng China

The copper nanoparticle-implanted nanocellulose (Cu@NC) fibrils and honey (Hon)-incorporated chitosan/polyvinyl alcohol (CS/PVA) matrix-based nanocomposite films were fabricated for food packaging applications. Self-synthesized Cu@NC was used as a nanofiller that fortifies the food packaging film, following a “hit two targets with one arrow” approach. The effects of Cu@NC and honey on various properties were investigated. The composite film exhibited exceptional UV barrier properties (up to 500 nm), enhanced hydrophobicity (86 ± 1.1°), extended lifespan, and biodegradability, indicating it as a “low-impact” material. Notably, the tensile strength of the nanocomposite film enhanced to 4.63 ± 0.04 MPa, water vapor transmission reduced to 55.68 ± 0.69 gm−2 h−1, and the solubility decreased to 65.72 ± 0.83% upon adding Cu@NC, making the films more effective for food preservation. The nanocomposite film exhibited strong antimicrobial activity against Gram-positive bacteria, Staphylococcus aureus (MRSA), Gram-negative bacteria, Escherichia coli, and the fungal strain, Candida albicans. The overall migration values of Cu@NC2 in different simulants were lower than the permissible limit (10 mg/dm2). When applied to strawberries, the films significantly minimized weight loss and prevented microbial contamination under storage conditions (25 °C and 50 ± 5% RH). With their superior mechanical properties, antimicrobial efficacy, and flexibility, the Cu@NC and Hon-infused CS/PVA films are promising for fruit storage and transportation.

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Mechano-responsive hydrogel for direct stem cell manufacturing to therapy

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Bioactive materials 2023年第6期24卷 387-400页

作者： Yufeng Shou Ling Liu Qimin Liu Zhicheng Le Khang Leng Lee Hua Li Xianlei Li Dion Zhanyun Koh Yuwen Wang Tong Ming Liu Zheng Yang Chwee Teck Lim Christine Cheung Andy Tay Department of Biomedical Engineering National University of Singapore117583Singapore Institute for Health Innovation&Technology National University of Singapore117599Singapore School of Civil Engineering and Architecture Wuhan University of Technology430070WuhanChina NUS Tissue Engineering Program National University of Singapore117510Singapore Lee Kong Chian School of Medicine Nanyang Technological University636921Singapore School of Mechanical and Aerospace Engineering Nanyang Technological University639798Singapore Institute of Molecular and Cell Biology Agency for ScienceTechnology and Research(A*STAR)138648Singapore Department of Orthopaedic Surgery Yong Loo Lin School of MedicineNational University of Singapore119288Singapore Mechanobiology Institute National University of Singapore117411Singapore

Bone marrow-derived mesenchymal stem cell(MSC)is one of the most actively studied cell types due to its regenerative potential and immunomodulatory *** cell expansion methods using 2D tissue culture plates and 2.5D microcarriers in bioreactors can generate large cell numbers,but they compromise stem cell potency and lack mechanical preconditioning to prepare MSC for physiological loading expected in *** overcome these challenges,in this work,we describe a 3D dynamic hydrogel using magneto-stimulation for direct MSC manufacturing to *** our technology,we found that dynamic mechanical stimulation(DMS)enhanced matrix-integrinβ1 interactions which induced MSCs spreading and *** addition,DMS could modulate MSC biofunctions including directing MSC differentiation into specific lineages and boosting paracrine activities(e.g.,growth factor secretion)through YAP nuclear localization and FAK-ERK *** our magnetic hydrogel,complex procedures from MSC manufacturing to final clinical use,can be integrated into one single platform,and we believe this‘all-in-one’technology could offer a paradigm shift to existing standards in MSC therapy.

关键词： Mesenchymal stem cell Dynamic mechanical stimulation Magnetic hydrogel Stem cell manufacturing Cell therapy

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Flexoelectric Catalysts Based on Hierarchical Wrinkling Surface of Centrosymmetric High-Entropy Oxide

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ACS Nano 2023年第17期17卷 17417-17426页

作者： Wu, Ping Yun Le, Kim Tuyen Lin, Hsun-Yen Chen, Yu-Ching Wu, Po-Han Wu, Jyh Ming Department of Materials Science and Engineering National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan High Entropy Materials Center National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Ph.D. Program in Prospective Functional Materials Industry National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan

A high-entropy oxide nanocomposite with Ag(CuZn)(AlCr)2O4 and CuO phases is fabricated to form an abundantly hierarchical wrinkled surface. Application of a mechanical force to the nanocomposite resulted in a nonhomogeneous strain gradient at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, changing the local charge distribution and creating flexoelectric polarization that delayed electron/hole recombination. Transmission electron microscopy energy-dispersive X-ray spectroscopy mapping revealed that the Ag, Cu, Zn, Al, Cr, and O elements were highly distributed throughout the nanocomposite. The nanocomposite produced 2116 μmol·g-1 h-1 of H2 without external light irradiation, which is 980% higher than the H2 produced by the same nanocomposite under the photocatalytic process. A strong electrical field is observed at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, demonstrating that a flexoelectric potential (flexopotential) is established at the structural boundaries because the strain gradient is localized at these interfaces. The nanocomposite is a promising approach for environmentally friendly energy production. © 2023 American Chemical Society.

关键词： Nanocomposites

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