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Scalable electrochemical grafting of anthraquinone for fabrication of multifunctional carbon fibers

Journal of Materials Science & Technology 2024年第33期200卷 162-175页

作者： Piers Coia Bhagya Dharmasiri Filip Stojcevski David J.Hayne Elmer Austria Jr. Behnam Akhavan Joselito M.Razal Ken Aldren S.Usman Melissa K.Stanfield Luke C.Henderson Institute for Frontier Materials Deakin UniversityWaurn PondsVictoria 3216Australia DSTG Victoria 3168Australia School of Biomedical Engineering Faculty of EngineeringUniversity of SydneySydneyNSW 2006Australia School of Engineering University of NewcastleCallaghanNSW 2308Australia Hunter Medical Research Institute(HMRI) Precision Medicine ProgramNew Lambton Heights NSW 2305Australia School of Natural Sciences–Chemistry University of TasmaniaHobartTasmania 7005Australia

Carbon fiber electrodes were prepared by grafting anthraquinone molecules via a scalable electrochemical approach which simultaneously increased interfacial and electrochemical capacitance *** this work,anthraquinone diazonium salts were synthesized and grafted onto carbon fiber tows at various *** modified fibers were subsequently evaluated mechanically and electrochemically to analyze their suitability in structural *** to control fibers,the grafted anthraquinone groups resulted in a 30%increase in interfacial shear strength(IFSS)and 6.6×increase in specific *** application was also a focus thus carbon fibers were also modified with insitu generated diazonium salts to determine the applicability to an in-line industrial ***,potentiostatic functionalization of fibers with in-situ generated diazonium salts AQ-1 and AQ-2,showed 3×and 4.3×increase in specific capacitance,respectively,relative to unmodified carbon fiber(CF).We expect that implementing a scalable method to introduce a conductive and electrochemically active covalently bound surface chemistry layer onto carbon fiber exhibits a higher specific capacitance than carbon fiber grafted with most other small molecules reported in *** will open new avenues for manufacturing multifunctional and high-performance fibers with tailored properties for specific/targeted applications.

关键词： Carbon fiber Energy storage Interface Surface modification

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Heterojunction and co-catalyst engineering of bismuth vanadate by nickel molybdenum oxide and carbon quantum dot decorations for photoelectrochemical water splitting

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International Journal of Hydrogen Energy 2024年 51卷 1099-1108页

作者： Kuo, Tsung-Rong Chiou, Yu-Tai Huang, Hsiao-Wen Kongvarhodom, Chutima Saukani, Muhammad Yougbaré, Sibidou Chen, Hung-Ming Lin, Lu-Yin Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Gingen technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan

Improving the charge diffusion length and water oxidation kinetics of bismuth vanadate (BiVO4) is essential to achieve better photoelectrochemical catalytic ability for water oxidation. Establishing heterojunctions and incorporating co-catalysts with BiVO4 create facile charge transfer paths and generate more water oxidation reactions. In this work, nickel molybdenum oxide (NM) and carbon quantum dot (CQD) are firstly deposited on BiVO4 by hydrothermal and soaking processes to design an efficient co-catalyst/photocatalyst system for water oxidation. The depositing amount of CQD is optimized to balance contributions of CQD and NM as the hole sink and the light-to-electron generator, respectively. The highest photocurrent densities of 2.2 and 3.9 mA/cm2 are achieved for BiVO4/NM/CQD in the electrolyte without and with hole scavenger, respectively. The BiVO4 electrode only shows a photocurrent density of 1.2 mA/cm2 in the electrolyte without hole scavenger. The best photoelectrochemical catalytic ability of BiVO4/NM/CQD is approached by the reduced charge-transfer resistance and charge recombination as well as the enhancement on carrier densities. The excellent long-term stability with the photocurrent retention of 90% under illumination for 24 h is also obtained for BiVO4/NM/CQD. This study opens a blueprint on designing efficient catalysts for water oxidation by incorporating heterojunction and co-catalyst materials simultaneously. © 2023 Hydrogen Energy Publications LLC

关键词： Heterojunctions

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Efficiently catalyzing photo-oxidation of water by surface engineering of bismuth vanadate with nickel molybdenum oxide coverages

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International Journal of Hydrogen Energy 2024年 51卷 613-622页

作者： Kuo, Tsung-Rong Huang, Hsiao-Wen Kongvarhodom, Chutima Saukani, Muhammad Yougbaré, Sibidou Chen, Hung-Ming Lin, Lu-Yin International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Graduate Institute of Nanomedicine and Medical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering King Mongkut's University of Technology Thonburi 126 Pracha-u-thit Toong-kru Bangkok10140 Thailand Department of Mechanical Engineering Faculty of Engineering Universitas Islam Kalimantan MAB Jl. Adhyaksa No. 2 Banjarmasin70124 Indonesia /Nanoro 03 B.P 7192 Ouagadougou 03 Burkina Faso Gingen Technology Co. LTD. Rm. 7 10F. No.189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan

Bismuth vanadate with suitable band edges is one of the efficient photocatalysts for water oxidation. Establishing heterojunction can improve electron diffusion lengths and photocatalytic ability of BiVO4. In this work, nickel molybdenum oxide (Ni–Mo–O) and BiVO4 heterojunction is established by the hydrothermal process with different nickel to molybdenum precursor ratios. The Ni–Mo–O/BiVO4 electrode is applied as photoanodes for water oxidation. The growth mechanism of Ni–Mo–O on BiVO4 surface is proposed. The Ni–Mo–O deposition amount is optimized regarding to light absorbance and charger transportation. The largest photocurrent density of 1.72 mA/cm2 at 1.23 VRHE is obtained for the optimal NiMoO4/BiVO4 electrode (NM12) in the electrolyte without hole scavenger, while the pure BiVO4 electrode only shows a photocurrent density of 0.90 mA/cm2. The NM12 electrode even presented an impressive photocurrent density of 5.39 mA/cm2 at 1.23 VRHE in the electrolyte with the hole scavenger, owing to the abundant active sites and higher light absorbance as well as the favorable synergistic effects from its suitable Ni to Mo ratio. The NM12 electrode also shows excellent long-term stability with the photocurrent retention of 83% after illumination for 6500 s. This work opens a blueprint for establishing a novel heterojunction with the adjustable metal ratio and coverage on BiVO4. © 2023 Hydrogen Energy Publications LLC

关键词： Heterojunctions

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Strain and hyaluronic acid interact to regulate ovarian cancer cell proliferation,migration,and drug resistance

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Mechanobiology in Medicine 2024年第4期2卷 69-82页

作者： Maranda Kramer Allyson Criswell Kamari Marzette Emerson Cutcliffe Mary Kathryn Sewell-Loftin Department of Biomedical Engineering University of Alabama at BirminghamBirminghamAL 35294USA O'Neal Comprehensive Cancer Center University of Alabama at BirminghamBirmingham AL 35233USA Biomedical Sciences Program Department of Clinical and Diagnostic SciencesSchool of Health ProfessionsUniversity of Alabama at BirminghamUSA

The ovarian tumor microenvironment plays a critical yet is poorly understood role in the regulation of cancer cell behaviors including proliferation,migration,and response to chemotherapy *** cancer is the deadliest gynecological cancer,due to diagnosis at late stages of the disease and increased resistance to chemotherapies for recurrent *** how the tumor microenvironment(TME)interacts with biomechanical forces to drive changes to ovarian cancer cell behaviors could elucidate novel treatment strategies for this patient ***,limitations in current preclinical models of the ovarian TME do not permit investigation of crosstalk between signaling pathways and mechanical *** study focused on uncovering how strains and hyaluronic acid(HA)interact to signal through the CD44 receptor to alter ovarian cancer cell growth,migration,and response to a commonly used chemotherapy,*** an advanced 3D in vitro model,we were able to identify how interactions of strain and HA as in the TME synergistically drive enhanced proliferation and migration in an ovarian tumor model line,while decreasing response to paclitaxel *** study demonstrates the importance of elucidating how the mechanical forces present in the ovarian TME drive disease progression and response to treatment.

关键词： Ovarian cancer Mechanobiology Tumor microenvironment Hyaluronic acid CD44 Chemoresistance

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Integrated Numerical Model for Hemodynamic Simulation of Human Atria Under Atrial Fibrillation by Coupling 3D Electrophysiological Activity 9th

Integrated Numerical Model for Hemodynamic Simulation of Hum...

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9th Latin American Congress on biomedical engineering, CLAIB 2022 and 28th Brazilian Congress on biomedical engineering, CBEB 2022

作者： Lameu, João Siles, Jimena G. Sandoval, Italo McInnis, Melissa Salinet, João HEartLab - Biomedical Engineering Federal University of ABC São Bernardo do Campo Brazil Graduate Program in Biotechnoscience Federal University of ABC São Paulo Brazil

ISBN: (纸本)9783031494000

Atrial Fibrillation (AF) is the most common cardiac arrhythmia, increasing the chance of ischemic events five-fold. AF is characterized by fast and abnormal electrical activity, leading to disturbance in atrial contraction, resulting in pro-thrombotic zones due to blood stagnation. Literature shows that hemodynamic modeling using Computational Fluid Dynamics (CFD) has been used to evaluate the hemodynamic outcomes of atria chambers under AF;however, with simplifications related to the electromechanical effects of AF. This study aims to present an integrated analysis by coupling electrophysiological information to a hemodynamic model. A patient undergoing an electrophysiology study was enrolled. Firstly, the patient underwent Magnetic Resonance Imaging (MRI) scan, followed by an electrophysiology study. From MRI images, atrial shell was segmented through a semiautomatic image processing pipeline. Then, multi-electrode catheters were used to acquire electrophysiology signals, allowing determination of local activation times in the 3D atria shell. The 3D mapping provided AF activation patterns used as boundary conditions in the hemodynamic model. The mechanical effects from AF activity were coupled into the blood flow using a momentum method, allowing the local oscillatory wall motion to be mimicked due to the AF activity and its propagation effects through the blood flow. Statistical analysis of fundamental hemodynamic field properties (pressure and wall shear stress, WSS) exhibited a higher dispersion when considering the momentum method. The hemodynamic field presented larger pro-thrombotic zones (WSS ≤ 0.1 Pa) when considering the wall effects of AF activity © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Computational fluid dynamics

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Design of a Monitor for Harmful Gases in Hospital Environments 3

Design of a Monitor for Harmful Gases in Hospital Environmen...

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3rd International Congress of biomedical engineering and Bioengineering, CIIBBI 2024

作者： Cadavid, Camila Malvehy Giraldo Reyes, Juan Esteban Cabrera Lopez, John Jairo Universidad Autónoma de Occidente Biomedical Engineering Undergrad Program Cali Colombia Universidad Autónoma de Occidente G - Bio Research Group Cali Colombia

ISBN: (纸本)9798331532352

Indoor environmental quality, including thermal, acoustic, light and respirable air parameters, is critical to public health. Many people conduct more than 80% of their daily activities in indoor spaces, such as offices, educational institutions, and healthcare facilities. Air quality integrity is a determining factor for both safety and physiological well-being. In hospital environments, environmental pollutants emanate from medical procedures, inherent materials, equipment, and often inadequate ventilation infrastructures. Judicious air quality control in these places is essential to avoid immediate conditions such as eye irritation and fatigue and mitigate the long-term onset of respiratory diseases and neoplastic pathologies. Implementing rigorous surveillance systems and effective pollution reduction protocols is fundamental to safeguarding a healthy environment that promotes recovery and care delivery. This paper presents a monitor's design and conceptual model for carbon dioxide, particulate matter, temperature, and ambient humidity. In this case, the monitor's design and functional requirements and the sensors' sensitivities are established, considering the regulations that establish the limit values in closed environments. This conceptual model is susceptible to implementation, laboratory adjustments, and potential use as an air quality monitor in hospital environments. © 2024 IEEE.

关键词： Indoor air pollution

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A novel label-free electrochemical immunosensor for the detection of heat shock protein 70 of lung adenocarcinoma cell line following paclitaxel treatment using l-cysteine-functionalized Au@MnO2/MoO3 nanocomposites

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RSC Advances 2023年第43期13卷 29847-29861页

作者： Chen, Yi-An Shie, Ming-You Ho, Chia-Che Ye, Sheng-Wen Chen, I.-Wen Peter Shih, Yu-Yin Shen, Yu-Fang Chen, Yi-Wen x-Dimension Center for Medical Research and Translation China Medical University Hospital Taichung City404332 Taiwan The Master Program for Biomedical Engineering China Medical University Taichung City406040 Taiwan Department of Biomedical Engineering China Medical University Taichung City40447 Taiwan Department of Bioinformatics and Medical Engineering Asia University Taichung City41354 Taiwan Department of Chemistry National Cheng Kung University Tainan70101 Taiwan Graduate Institute of Biomedical Sciences China Medical University Taichung City40447 Taiwan

The future trend in achieving precision medicine involves the development of non-invasive cancer biomarker sensors that offer high accuracy, low cost, and time-saving benefits for risk clarification, early detection, disease detection, and therapeutic monitoring. A facile approach for the synthesis of MoO3 nanosheets was developed by thermally oxidizing MoS2 nanosheets in air followed by thermal annealing. Subsequently, Au@MnO2 nanocomposites were prepared using a combined hydrothermal process and in situ chemical synthesis. In this study, we present a novel immunosensor design strategy involving the immobilization of antiHSP70 antibodies on Au@MnO2/MoO3 nanocomposites modified on a screen-printed electrode (SPE) using EDC/NHS chemistry. This study establishes HSP70 as a potential biomarker for monitoring therapeutic response during anticancer therapy. Impedance measurements of HSP70 on the Au@MnO2/MoO3/SPE immunosensor using EIS showed an increase in impedance with an increase in HSP70 concentration. The electrochemical immunosensor demonstrated a good linear response in the range of 0.001 to 1000 ng mL−1 with a detection limit of 0.17 pg mL−1 under optimal conditions. Moreover, the immunosensor was effective in detecting HSP70 at low concentrations in a lung adenocarcinoma cell line following Paclitaxel treatment, indicating its potential for early detection of the HSP70 biomarker in organ-on-a-chip and clinical applications. © 2023 The Royal Society of Chemistry.

关键词： Nanosheets

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Mitochondria-specific near-infrared photoactivation of peroxynitrite upconversion luminescent nanogenerator for precision cancer gas therapy

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Acta Pharmaceutica Sinica B 2024年第1期14卷 378-391页

作者： Hui Yu Aliya Tiemuer Xufeng Yao Mingyuan Zuo Hai-Yan Wang Yi Liu Xiaoyuan Chen Department of Biomedical Engineering School of EngineeringChina Pharmaceutical UniversityNanjing 211198China School of Mechanical Engineering Southeast UniversityNanjing 211189China Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and College of Design and EngineeringNational University of SingaporeSingapore 119074Singapore Clinical Imaging Research Centre Centre for Translational MedicineYong Loo Lin School of MedicineNational University of SingaporeSingapore 117599Singapore Nanomedicine Translational Research Program Yong Loo Lin School of MedicineNational University of SingaporeSingapore 117597Singapore Institute of Molecular and Cell Biology Agency for ScienceTechnologyand Research(A*STAR)ProteosSingapore 138673Singapore

Gas therapy is emerging as a highly promising therapeutic strategy for cancer ***,there are limitations,including the lack of targeted subcellular organelle accuracy and spatiotemporal release precision,associated with gas *** this study,we developed a series of photoactivatable nitric oxide(NO)donors NRh-R-NO(R=Me,Et,Bn,iPr,and Ph)based on an N-nitrosated upconversion luminescent rhodamine *** the irradiation of 808 nm light,only NRh-Ph-NO could effectively release NO and NRh-Ph with a significant turn-on frequency upconversion luminescence(FUCL)signal at 740 nm,ascribed to lower N-N bond dissociation *** also investigated the involved multistage near-infrared-controlled cascade release of gas therapy,including the NO released from NRh-Ph-NO along with one NRh-Ph molecule generation,the superoxide anion O_(2)^(⋅−)produced by the photodynamic therapy(PDT)effect of NRh-Ph,and highly toxic peroxynitrite anion(ONOO‒)generated from the co-existence of NO and O_(2)^(⋅−).After mild nano-modification,the nanogenerator(NRh-Ph-NO NPs)empowered with superior biocompatibility could target *** an 808 nm laser irradiation,NRh-Ph-NO NPs could induce NO/ROS to generate RNS,causing a decrease in the mitochondrial membrane potential and initiating apoptosis by caspase-3 activation,which further induced tumor immunogenic cell death(ICD).In vivo therapeutic results of NRh-Ph-NO NPs showed augmented RNS-potentiated gas therapy,demonstrating excellent biocompatibility and effective tumor inhibition guided by real-time FUCL ***,this versatile strategy defines the targeted RNS-mediated cancer therapy.

关键词： Near infrared Photo-triggered Mitochondrion Upconversion luminescent bioimaging Peroxynitrite Nanogenerator Gas therapy In vivo

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3D-printed porous titanium suture anchor: a rabbit lateral femoral condyle model

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BMC Musculoskeletal Disorders 2024年第1期25卷 1页

作者： Wu, Lien-Chen Hsieh, Yueh-Ying Hsu, Ting-Shuo Liu, Po-Yi Tsuang, Fon-Yih Kuo, Yi-Jie Chen, Chia-Hsien Van Huynh, T.I.N. Chiang, Chang-Jung Department of Orthopaedics Shuang Ho Hospital Taipei Medical University Department of Orthopaedics School of Medicine College of Medicine Taipei Medical University Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University Division of Neurosurgery Department of Surgery National Taiwan University Hospital Spine Tumor Center National Taiwan University Hospital Department of Orthopedic Surgery Wan Fang Hospital Taipei Medical University School of Biomedical Engineering College of Biomedical Engineering Taipei Medical University Department of Interventional Cardiology Thong Nhat Hospital International Ph.D program in medicine college of medicine Taipei medical university

Background: The inclusion of a connecting path in a porous implant can promote nutrient diffusion to cells and enhance bone ingrowth. Consequently, this study aimed to evaluate the biomechanical, radiographic, and histopathological performance of a novel 3D-printed porous suture anchor in a rabbit femur model. Methods: Three test groups were formed based on the type of suture anchor (SA): Commercial SA (CSA, Group A, n = 20), custom solid SA (CSSA, Group B, n = 20), and custom porous SA (CPSA, Group C, n = 20). The SAs were implanted in the lateral femoral condyle of the right leg in each rabbit. The rabbits (New Zealand white rabbits, male, mean body weight of 2.8 ± 0.5 kg, age 8 months) underwent identical treatment and were randomized into experimental and control groups via computer-generated randomization. Five rabbits (10 femoral condyles) were euthanized at 0, 4, 8, and 12 weeks post-implantation for micro-CT, histological analysis, and biomechanical testing. Results: At 12 weeks, the CPSA showed a higher BV/TV (median 0.7301, IQR 0.7276–0.7315) than the CSSA and CSA. The histological analysis showed mineralized osteocytes near the SA. At 4 weeks, new bone was observed around the CPSA and had penetrated its porous structure. By 12 weeks, there was no significant difference in ultimate failure load between the CSA and CPSA. Conclusions: We demonstrated that the innovative 3D-printed porous suture anchor exhibited comparable pullout strength to conventional threaded suture anchors at the 12-week postoperative time-point period. Furthermore, our porous anchor design enhanced new bone formation and facilitated bone growth into the implant structure, resulting in improved biomechanical stability. © The Author(s) 2024.

关键词： 3D-printed porous anchor Bone formation Bone ingrowth Suture anchor

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Understanding Acoustic Phenomena in Stenosed Coronary Arteries through Bond Graph Modeling of Sound Generation 46

Understanding Acoustic Phenomena in Stenosed Coronary Arteri...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Sandoval, Loreto Rojas Ulloa, René Araya Da Silva, Ana Karoline Almeida De Almeida Nunes, Gustavo Adolfo Marcelino Faria, Rafael Mendes Sepúlveda, José Parra Da Costa, Lindemberg Barreto Mota Acevedo, Luca Rubilar Rosa, Mário Fabrício Fleury Pino, Esteban J. De Siqueira Rodrigues Fleury Rosa, Suélia Universidad de Concepción Electrical Engineering Department Chile University of Brasilia Mechanical Engineering Department Distrito Federal Brasilia70910-900 Brazil University of Brasilia Postgraduate Program in Biomedical Engineering Distrito Federal Brasilia70910-900 Brazil

ISBN: (纸本)9798350371499

Coronary artery stenosis is characterized by the obstruction or narrowing of coronary arteries, impairing blood flow to the cardiac muscle. Cardiovascular diseases rank among the leading global causes of death. Understanding the mechanisms, risk factors, and impacts of coronary artery stenosis (CAD) is essential for developing effective strategies for prevention, early diagnosis, and treatment, aiming to enhance cardiovascular health and reduce adverse consequences associated with this condition. Previous studies explore the potential of acoustic devices in non-invasive CAD detection through the analysis of cardiac sounds. A theoretical model utilized a cardiac microphone and signal processing to generate sounds in partially obstructed coronary arteries. Emphasizing the model's sensitivity to geometric and dynamic parameters, this article integrates Bond Graph (BG) models into the analog sound circuit, aiming to develop a dynamic representation of biological processes in complex systems like coronary arteries. This research seeks to construct a comprehensive mathematical model using a state-space approach to enhance understanding, diagnostics, and interventions in cardiovascular conditions. The utilization of BG demonstrated notable similarity to the pathology of the disease, providing an accurate representation of its effects. The model's sensitivity to geometric and dynamic parameters allowed an in-depth understanding of the specific physiological characteristics of the disease, highlighting its ability to reproduce patterns observed in patients with CAD. © 2024 IEEE.

关键词： Diagnosis

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