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Electrochemical sensor based on ZnO@MWCNT/ glassy carbon electrode for the detection of warfarin (blood anticoagulant)

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Surfaces and Interfaces 2025年 67卷

作者： Manjunath, Kumbar Mudakappa Yemmi, Rajeshwari Swamy, B.E. Kumara Eldesoky, Gaber E. Govindasamy, Mani Division of Plant Breeding and Genetics Central Coffee Research Institute Karnataka Chikkamagaluru 577117 India Department of Industrial Chemistry Kuvempu University Karnataka Shivamogga India Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Centre for Applied Research Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Tamil Nadu Chennai 602105 India Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry Korea University Seoul Seongbuk-gu South Korea

This study employed ZnO nanoparticles, multi-walled carbon nanotubes (MWCNTs), and a modified glassy carbon electrode (GCE) as a quick and sensitive method for detecting warfarin at biological pH levels. The ultrasonication technique was utilized in the synthesis of the ZnO@MWCNTs nanocomposite. The ZnO@MWCNTs were characterized using Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), spectroscopy, analytical techniques, and electrochemical impedance spectroscopy (EIS). Cyclic voltammetry (CV) as well as differential pulse voltammetry (DPV) techniques are employed in the presence of PBS buffer as an electrolyte. We observed unique oxidative peak currents an indication of the electrochemical mechanism of warfarin at low potentials for ZnO @MWCNTs/GCE. Moreover, we successfully attained effective electrochemical detection of warfarin utilizing the proposed sensor, which exhibited an excellent low limit of detection (LOD) of 0.0188 μM across a linear range of 0.02–2867.37 μM. The proposed sensor exhibits excellent storage stability, repeatability, and reproducibility, and has been effectively utilized for the quantification of warfarin in real samples, including blood serum and urine as obtained good recovery and RSD value. © 2025 Elsevier B.V.

关键词： Differential pulse voltammetry Glassy carbon electrode Multiwalled carbon nanotubes Warfarin ZnO nanoparticles

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Enhanced Deep Learning Model Performance in 3D Multimodal Brain Tumor Segmentation with Gabor Filter 10

Enhanced Deep Learning Model Performance in 3D Multimodal Br...

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10th international Conference on Applied System Innovation, ICASI 2024

作者： Ahmad, Nisar Chen, Yao-Tien International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City Taiwan

ISBN: (纸本)9798350394924

medical image segmentation plays a crucial role in identifying and analyzing anatomical structures in medical images. This requires an accurate medical segmentation tool to delineate and quantitatively analyze the target regions, diagnose any abnormality, and assist in treatment planning. Deep learning approaches have emerged as a promising solution for automating medical segmentation. However, challenges arise when dealing with the complex shapes and spatial variations of some target regions, especially in 3D MRI scans. To deal with such transformations, specific techniques are required to properly analyze and preprocess the dataset and perform image filtering to provide better features for improved prediction performance of deep learning architectures. This study focuses on improving brain tumor segmentation in multimodal 3D MRI images. We observed significant improvements in multimodal brain tumor segmentation results (accuracy, IoU, and mIoU) using an optimized 3D Gabor filter, which helps extract meaningful features. Multichannel input images were preprocessed to remove noise and select an appropriate resolution to reduce computational complexity. An improvement in mean Intersection over Union (mIoU) from 0.714 to 0.804 and accuracy from 0.982 to 0.991 were achieved, which shows a major improvement. This work contributes to the field of medical image segmentation by offering an improved and efficient approach for brain tumor analysis in 3D MRI scans, potentially aiding in diagnosis and treatment planning. © 2024 IEEE.

关键词： Magnetic resonance imaging

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A Foldable Hybrid Supercapacitor with High Energy Density Driven by Cu-BDC@fMWCNT// Cashew De-Oiled Shell Derived Activated Carbon

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Advanced Sustainable Systems 2025年

作者： Prasath, Jeeva Sengottaiyan, Chinnasamy Arivanandhan, Mukannan Govindasamy, Mani Jayavel, Ramasamy Centre for Nanoscience and Technology Anna University Chennai 600025 India International PhD Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Toyota Technological Institute Tempaku Aichi Nagoya 468-8511 Japan Centre for Energy Storage Technologies Anna University Chennai 600025 India Research Centre for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Crystal Growth Centre Anna University Chennai 600025 India

The development of lightweight and foldable energy storage systems is pivotal for advancing next-generation automotive technologies. A high-performance foldable pouch cell supercapacitor is fabricated using Cu-BDC@fMWCNT as the positive electrode, cashew de-oiled shell-derived activated carbon as the negative electrode and a PVA-KOH/Super-P gel electrolyte. The device demonstrates an outstanding specific capacity of 163 C g⁻¹ at 1 A g⁻¹, achieving a remarkable energy density of 36.22 W h kg⁻¹ and a peak power density of 4000 W kg⁻¹. Rigorous mechanical evaluations, including 90° and 360° folding tests, confirm excellent foldability and mechanical stability with negligible performance degradation. The superior electrochemical performance arises from the synergistic charge storage mechanisms of the hybrid electrodes, enhancing ion transport and redox activity. The foldable supercapacitor combines exceptional energy storage capabilities with robust mechanical endurance, setting a new benchmark for advanced, high-performance energy storage devices tailored to the stringent demands for automotive applications. © 2025 Wiley-VCH GmbH.

关键词： cashew waste derived AC Cu-BDC fMWCNT foldable supercapacitor gel-electrolyte

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UNet-based Automatic Multicalss Brain Tissue Segmentation

UNet-based Automatic Multicalss Brain Tissue Segmentation

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2023 international Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2023

作者： Ahmad, Nisar Chen, Yao-Tien Ming Chi University of Technology Program in Innovative Technology of Biomedical Engineering and Medical Devices New Taipei City Taiwan

ISBN: (纸本)9798350324174

In brain research, brain tissue segmentation techniques have offered vast aid and possibilities for quantitative analysis of the brain to detect brain tumor and other brain issues. In this paper, UNet-based multiclass brain tissue segmentation is presented. To achieve the best performance of the model, data augmentation techniques are applied. The training, validation and testing of the model is performed on the BrainWeb dataset. The model has achieved improved accuracy and IoU after data augmentation. Both pre and post data augmentation results are presented which show clear improvement in model performance after data augmentation. The achieved IoU for white matter, gray matter and cerebrospinal fluid are 0.84, 0.95 and 0.92, respectively. Our model accurately performed the multiclass brain tissue segmentation and this study proposes a valuable medical aid model. © 2023 IEEE.

关键词： Brain

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Using electroencephalography signals to explore the influence of Zentangle on meditation and mindfulness 9

Using electroencephalography signals to explore the influenc...

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9th international Conference on Applied System Innovation, ICASI 2023

作者： Usman, Muhammad Lin, Chun-Ling Ming Chi University of Technology International Ph.D Program in Innovative Technology of Biomedical Engineering and Medical Devices New Taipei City Taiwan Ming Chi University of Technology Department of Electrical Engineering New Taipei City Taiwan

ISBN: (纸本)9798350398380

Fifteen novices completed a Zentangle task while their brain activity was measured with electroencephalography (EEG) and their concentration emotional state, stress, and anxiety levels were evaluated with questionnaires. The study found increased activity in theta, alpha, beta, and gamma ranges associated with relaxation, focus, and mental activity. Participants reported improved concentration, emotional state, and reduced stress and anxiety levels after completing the task, suggesting the potential of Zentangle to enhance cognitive and emotional well-being. © 2023 IEEE.

关键词： Electroencephalography

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Ultrasensitive and selective electrochemical detection of hydroquinone using electropolymerized 7-amino cephalosporanic acid modified GCE

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Surface and Coatings technology 2025年

作者： H. Sathya Pandiaraja Varatharajan M.A. Ashkar M. Chandhru Mani Govindasamy S. Kutti Rani N. Vasimalai Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Vandalur Chennai 600 048 India International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Physics B.S. Abdur Rahman Crescent Institute of Science and Technology Vandalur Chennai 600 048 India Centre for Applied Research Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Chennai 602105 Tamil Nadu India Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan

Industrial wastewater pollution harms ecosystems and hinders sustainable development growth. Particularly, hydroquinone (HQ) has transitioned from a commercial chemical to an environmental hazard because of its extensive use in beauty products, pharmaceuticals, chemicals, and food industries. Therefore, developing electrochemical sensors for the detection of HQ is very important for environmental safety. Herein, the 7-ACA monomer was electropolymerized on the glassy carbon electrode (GCE) surface to examine the electrochemical oxidation of HQ utilizing CV (cyclic voltammetry) and DPV (differential pulse voltammetry) techniques. Scanning electron microscopy (SEM) characterization verified the deposition of the p-7-ACA on the glassy carbon electrode (GCE) surface. The designed p-7-ACA@GCE sensor exhibited better electrocatalytic property. The acquired DPV observations for the p-7-ACA@GCE demonstrated excellent limit of detection (LOD) 8.86 nmol L −1 and broad linear range (0.33 μM to 955 μM) for the detection of HQ. The developed sensor exhibits excellent repeatability, reproducibility, selectivity and better cyclic stability. In addition, the fabricated p-7-ACA@GCE was used to determine the HQ in a different environmental water sample.

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Developing a Respiratory Pressure Simulation Platform for a Portable Negative Pressure Filtering Chest Drainage System 16

Developing a Respiratory Pressure Simulation Platform for a ...

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16th IEEE international Conference on Nano/Molecular Medicine and engineering, NANOMED 2023

作者： Liao, Hao-Yen Chu, Cheng-Shane Wu, Yang-Shun Lin, Sheng-Chieh Lin, Chia-Tsai Hung, Kuo-Yung Ming Chi University of Technology Dept. of Intl. Ph.D Program in Innovative Technology of Biomedical Engineering and Medical Devices Taiwan Ming Chi University of Technology Department of Mechanical Engineering Taiwan Ming Chi University of Technology Research Center for Intelligent Medical Devices Taiwan

ISBN: (纸本)9798350343700

This study aims to reduce the risk of aerosol infection in patients and healthcare workers by establishing a portable negative pressure filtering chest drainage system (PNPFCDS) that filters aerosols and microparticles. By controlling the negative pressure precisely, the system can prevent aerosol transmission under different air leaks. By using a respiratory pressure simulation platform (RPSP), it has been demonstrated that the negative pressure filtering chest drainage system can achieve a minimum measured pressure error of 1.6% without simulated intrapleural pressure changes when the air leak flow rises to 800 ml/min. When the target pressure is -1.5 kPa under simulated intrapleural pressure changes with air leak of 500 ml/min, the measured pressure change rate ranges from -16.7 % to +22.7%. When the target pressure is -9 kPa, the measured pressure change rates ranges from -2% to +6.7%. According to ISO 10079-1, this study provides a model of a negative pressure filtering chest drainage system that is effective and safe. © 2023 IEEE.

关键词： Aerosols

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Eosin-Y containing electrospun fibers for optical ammonia sensing based on wavelength shift 8

Eosin-Y containing electrospun fibers for optical ammonia se...

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8th international Conference of Precision Machinery and Manufacturing technology, ICPMMT 2023

作者： Simanjuntak, M.S. Chu, C.S. Rispandi, R. Putro, D. Department of Mechanical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City24301 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City24301 Taiwan

Sensors in recent days have been in great demand in industrial zones of simple, low-cost sensors for effectively sensing various gases. This research work develops electrospinning fibers for optical ammonia sensing based on the wavelength shift. The optical sensing fibers were produced approach by the electrospinning technique. The addition of cellulose acetate (CA) matrix with doped Eosin-Y is an NH3 fluorophore. The same light emitting diode (LED) light source was used to excite NH3-sensitive dyes at 380 nm peak wavelength. Display the eosin Y emission spectrum, with a maximum wavelength of 582 nanometers. The observed red emission wavelength shift and fluorescence intensity at 582 nm decreased with increasing concentrations of NH3. The emission spectrum of eosin-Y fluorescence at 582 nanometers is changed with increasing NH3 concentrations ranging from 0 to 500 parts per million. In this work, according to the experiment results, the sensitivity of NH3 sensors is 7.73. Finally, the electrospinning fibers for optical NH3 sensing developed as a result of this research enable effective sensing of NH3 concentrations in practical applications in a variety of fields, including medical and industrial. © Published under licence by IOP Publishing Ltd.

关键词： Light sources

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TiO2 Hole Transport Layer Incorporated in a Thermally Evaporated Sb2Se3 Photoelectrode Exhibiting Low Onset Potential for Photoelectrochemical Applications

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Energy and Fuels 2024年第17期38卷 16936-16948页

作者： Xavier, Thatheyus Peter Piraviperumal, Malar Kuo, Chih-Yu Govindasamy, Mani Thinfilm Photovoltaics Laboratory Department of Physics and Nanotechnology SRM Institute of Science and Technology Tamil Nadu Kattankulathur603203 India Department of Chemical Engineering & Biotechnology National Taipei University of Technology Taipei City10608 Taiwan Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Department of Research and Innovation Saveetha School of Engineering SIMATS Chennai602105 India Taipei10608 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

Developing cost-effective photoelectrodes with a low band gap in the NIR-visible regions remains a challenge to achieve effective hydrogen production. We report the details of superstrate-configured photocathodes, consisting of antimony selenide (Sb2Se3) light absorbing layers with titanium dioxide (TiO2) as a hole transport layer, exhibiting the capability for hydrogen evolution with broad range light absorption enabled by the low band gap value of ∼1.2 eV of Sb2Se3. Strong anisotropy is a significant characteristic property of Sb2Se3, allowing superior electrical transportation along the [hkl] crystallographic orientation, which is obtained via close space evaporation of presynthesized bulk material at a growth temperature of 250 °C, over the solution-processed TiO2 film on a fluorine-doped tin oxide (FTO) substrate. The superstrate-configured FTO/TiO2/Sb2Se3 photocathode exhibited a photocurrent density of 100 μA cm-2 at −0.3 V vs RHE in 0.5 M H2SO4 under 1 sun illumination. To further improve photocurrent density, Pt as a cocatalyst was deposited over Sb2Se3 that led to enhanced photocurrent to 3 mA cm-2 at −0.3 V vs RHE in 0.5 M H2SO4 under 1 sun illumination. Despite the relatively lower photocurrent observed, which resulted due to a large conduction band offset (ΔECB = 0.99 eV) of the TiO2/Sb2Se3 interface in a superstrate configuration, a significantly lower onset potential of −0.1 V vs RHE was observed. The results are encouraging due to the low band gap of Sb2Se3, photocorrosion stability, and straightforward fabrication, which is expected to assist for significant outcomes. © 2024 American Chemical Society.

关键词： Titanium dioxide

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3D printed pore morphology mediates bone marrow stem cell behaviors via RhoA/ROCK2 signaling pathway for accelerating bone regeneration

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Bioactive Materials 2023年第8期26卷 413-424页

作者： Qiji Lu Jingjing Diao Yingqu Wang Jianlang Feng Fansen Zeng Yan Yang Yudi Kuang Naru Zhao Yingjun Wang School of Materials Science and Engineering South China University of TechnologyGuangzhou510641PR China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006PR China NMPA Key Laboratory for Research and Evaluation of Innovative Biomaterials for Medical Devices.Guangzhou 510006PR China Medical Devices Research&Testing Center of SCUT Guangzhou510006PR China School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou511442PR China Guangdong Institute of Advanced Biomaterials and Medical Devices Guangzhou510535PR China

Bone bionics and structural engineering have sparked a broad interest in optimizing artificial scaffolds for better bone ***,the mechanism behind scaffold pore morphology-regulated bone regeneration remains unclear,making the structure design of scaffolds for bone repair *** address this issue,we have carefully assessed diverse cell behaviors of bone mesenchymal stem cells(BMSCs)on theβ-tricalcium phosphate(β-TCP)scaffolds with three representative pore morphologies(i.e.,cross column,diamond,and gyroid pore unit,respectively).Among the scaffolds,BMSCs on theβ-TCP scaffold with diamond pore unit(designated as D-scaffold)demonstrated enhanced cytoskeletal forces,elongated nucleus,faster cell mobility,and better osteogenic differentiation potential(for example,the alkaline phosphatase expression level in D-scaffold were 1.5-2 times higher than other groups).RNA-sequencing analysis and signaling pathway intervention revealed that Ras homolog gene family A(RhoA)/Rho-associated kinase-2(ROCK2)has in-depth participated in the pore morphology-mediated BMSCs behaviors,indicating an important role of mechanical signaling transduction in scaffold-cell ***,femoral condyle defect repair results showed that D-scaffold could effectively promote endogenous bone regeneration,of which the osteogenesis rate was 1.2-1.8 times higher than the other ***,this work provides insights into pore morphology-mediated bone regeneration mechanisms for developing novel bioadaptive scaffold designs.

关键词： Bone mesenchymal stem cells 3D-printed scaffold Pore morphology Bone regeneration Structure-osteogenesis relationship

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