Sensors International最新文献_第5页

Analysis of BCB and SU 8 photonic waveguide in MZI architecture for point-of-care devices 护理点设备MZI结构中BCB和SU 8光子波导的分析

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100207

S. Prasanna Kumaar, A. Sivasubramanian

{"title":"Analysis of BCB and SU 8 photonic waveguide in MZI architecture for point-of-care devices","authors":"S. Prasanna Kumaar, A. Sivasubramanian","doi":"10.1016/j.sintl.2022.100207","DOIUrl":"https://doi.org/10.1016/j.sintl.2022.100207","url":null,"abstract":"<div><p>The proposed refractive index-based biosensor made of cost-effective polymer material in Mach-Zehnder configuration with novel horizontal slot waveguide structure offers high sensitivity. Due to the recent demand for low-cost point-of-care biosensor, silicon wafer-based polymer material has the potential for developing new hybrid waveguides for sensors. Hence we designed BenzoCycloButene (BCB), SU8 material as the core, and polymethyl methacrylate (PMMA) clad on a silicon wafer. The novelty of proposed BCB and SU8 horizontal slot waveguide structure of 2.5 <span><math><mrow><mi>μ</mi></mrow></math></span> m wide and 1.<span><math><mrow><mn>8</mn><mi>μ</mi></mrow></math></span> m thick with a slot height of 400 nm, which handles the analyte effectively without any external sample holder. In Mach-Zehnder Interferometer architecture, reference arm 1 cm and sensing arm at a length of 1.1 cm with analyte refractive index of cancer cell (RI = 1.401) and Influenza A type virus (RI = 1.48) are used. Effective mode index of BCB core and SU8 are investigated through Finite-difference time domain (FDTD) analysis, and sensitivity results are calculated. Detection of disease are plotted in the transmission spectrum with reference to normal human serum (RI = 1.35). This horizontal slot waveguide of BCB core achieves a sensitivity of 19280 nm/RIU and SU8 horizontal slot core waveguide provides a sensitivity of 16500 nm/RIU, which is higher in this polymer based refractive index biosensing.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Diabetic foot ulcer detection using deep learning approaches 使用深度学习方法检测糖尿病足溃疡

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100210

Puneeth N. Thotad , Geeta R. Bharamagoudar , Basavaraj S. Anami

引用次数: 11

Substrate-integrated waveguide (SIW) microwave sensor theory and model in characterising dielectric material: A review 衬底集成波导（SIW）微波传感器在介电材料表征中的理论和模型：综述

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100244

Nazmus Sakib Khair , Nurhafizah Abu Talip Yusof , Yasmin Abdul Wahab , Bifta Sama Bari , Nur Idayu Ayob , Maizatul Zolkapli

{"title":"Substrate-integrated waveguide (SIW) microwave sensor theory and model in characterising dielectric material: A review","authors":"Nazmus Sakib Khair , Nurhafizah Abu Talip Yusof , Yasmin Abdul Wahab , Bifta Sama Bari , Nur Idayu Ayob , Maizatul Zolkapli","doi":"10.1016/j.sintl.2023.100244","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100244","url":null,"abstract":"<div><p>Microwave sensors offer appealing features such as susceptibility, quick response, and non-invasiveness, making them valuable tools for highly accurate measurements of material characterisation. A wide range of techniques, including cavity waveguide, planar transmission line, cavity waveguide perturbation, open-ended coaxial probe, and free-space transmission, have been employed to characterise materials that are essential for their cost-effectiveness, ease of manufacturing, high sensitivity, good quality factor (Q-factor), and compact size, allowing them to be applied to different material types. Among the microwave sensor types, the substrate-integrated waveguide (SIW) has emerged as a promising technology in order to characterise materials in an efficient manner. This paper presents a review of the current state and potential opportunities of SIW microwave sensors in the characterisation of dielectric materials. It provides insights into various design principles, techniques, and applications of SIW microwave sensors across different sectors, highlighting their advantages and limitations compared to conventional waveguide-based sensors. Furthermore, the paper summarises several fabrication methods that can be implemented for SIW microwave sensors to enable the production of efficient and reliable sensors. Additionally, the future directions provided in this paper aim to contribute to the ongoing development and optimisation of SIW-based microwave sensors for accurate and efficient dielectric material characterisation. Overall, this review article serves as a beneficial resource for new researchers seeking to understand the role of SIW microwave sensors in material characterisation. It outlines the current status, opportunities, and potential advancements of SIW sensors, shedding light on their significance and potential impact in the field of material characterisation.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Engineering and chemistry aspects of the well-known conductive polymers as sensors: Characterization, mechanism, synthesis, scale-up: A review 作为传感器的知名导电聚合物的工程和化学方面：表征、机理、合成、放大：综述

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100240

Hadiseh Masoumi , Azam Aslani , Ahad Ghaemi , Hasan Farrokhzad

引用次数: 1

Using parallel plates capacitor as a volumetric flow rate sensor and direction detection for microfluidic/nanofluidic and extra smaller applications 使用平行板电容器作为体积流速传感器和方向检测，用于微流体/纳米流体和超小型应用

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100247

Asem M.AL. Jarrah , Mayyas M. AlMahasneh

{"title":"Using parallel plates capacitor as a volumetric flow rate sensor and direction detection for microfluidic/nanofluidic and extra smaller applications","authors":"Asem M.AL. Jarrah , Mayyas M. AlMahasneh","doi":"10.1016/j.sintl.2023.100247","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100247","url":null,"abstract":"<div><p>This paper shows how a single parallel plate capacitor can be used to sense volumetric flow rate in micro/nano and smaller scale fluidic conduits and how a double parallel plate capacitor can be used to sense both volumetric flow rate and direction of flow. The concept was developed based on the principles of conservation of energy with some fundamentals of electricity and electromagnetics. Furthermore, the concept was validated experimentally to be accurate. Upon validation the measurement of the sensor was found to be in good agreement with experimental measurement with more accuracy obtained as the supplied voltage for the sensor is increased. Also, the accuracy of the developed concept increases as the characteristic length of the conduit decreases which makes the developed concept even more suitable for smaller scales applications. The concept consumes extremely low power and can be used directly without calibration provided that accurate value for magnetic permittivity of fluid is available. Moreover, the concept can be used for any type of fluid of any conduit shape with easy incorporation onto lab-on-a-chip or MEMS technology. The sensitivity of the sensor is approximately 0.03 A/(m<sup>3</sup>/s) which is good compared to other sensors.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart predictive analytics care monitoring model based on multi sensor IoT system: Management of diaper and attitude for the bedridden elderly 基于多传感器物联网系统的智能预测分析护理监测模型：卧床老人的尿布和态度管理

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100213

Jaeho Baek

引用次数: 4

Quantum inspired improved AI computing for the sensors of cardiac mechano-biology 受量子启发，用于心脏机械生物学传感器的改进人工智能计算

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100212

Ayesha Sohail, Usman Ashiq

{"title":"Quantum inspired improved AI computing for the sensors of cardiac mechano-biology","authors":"Ayesha Sohail, Usman Ashiq","doi":"10.1016/j.sintl.2022.100212","DOIUrl":"https://doi.org/10.1016/j.sintl.2022.100212","url":null,"abstract":"<div><p>Recent advancements in the field of quantum mechanics have opened the research avenues for the accurate mapping of the heart’s conductivity with the aid of quantum sensors.The heart rate variability can now be accessed to better levels with the aid of recent noninvasive approaches. This novel idea can be improved with the aid of transfer learning where a smart machine learning algorithm, the “improved dynamic time wrapping” can be used, after selecting the important attributes such as the cardiac action potential. During this research, a two step approach is used for the dynamical analysis of the atrial fibrillation cardiac amyloid, since the Atrial-fibrillation (AF) is more common in patients with the “cardiac amyloidosis”, resulting from the deposition of amyloid protein. During the first step, inspired from the experimental studies in the domain of cardiac amyloidosis, an electric heart model is simulated for different amyloid deposition levels, and during the second step, the transfer learning algorithm is applied to explore the time series data of the electric potential and its divergence. This AI- synchronised divergence can be used to cross verify the electric potential divergence, detected by novel quantum sensors, in ongoing and future research projects.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

High strain lead-free piezo ceramics for sensor and actuator applications: A review 用于传感器和致动器的高应变无铅压电陶瓷：综述

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100226

P.K. Panda , B. Sahoo , T.S. Thejas

引用次数: 2

Electrochemical sensor of carboxymethyl cellulose and photocatalytic degradation of Navy Blue dye by sonochemically synthesized Titanium oxide nanoparticles 羧甲基纤维素电化学传感器及纳米氧化钛光催化降解海军蓝染料

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100239

K.M. Mamatha , V. Srinivasa Murthy , B.M. Thammanna , T. Naveen Kumar , A.A. Jahagirdar , A. Naveen Kumar , Murthy Muniyappa , C.R. Ravikumar , H.C. Ananda Murthy

{"title":"Electrochemical sensor of carboxymethyl cellulose and photocatalytic degradation of Navy Blue dye by sonochemically synthesized Titanium oxide nanoparticles","authors":"K.M. Mamatha , V. Srinivasa Murthy , B.M. Thammanna , T. Naveen Kumar , A.A. Jahagirdar , A. Naveen Kumar , Murthy Muniyappa , C.R. Ravikumar , H.C. Ananda Murthy","doi":"10.1016/j.sintl.2023.100239","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100239","url":null,"abstract":"<div><p>Nanocrystalline titanium oxide nanoparticles (TiO<sub>2</sub> NPs) were synthesized by using a low-cost sonochemical method. TiO<sub>2</sub> NPs exhibited anatase phase and an average crystallite size of 40.64 nm, according to a powder X-ray diffraction (PXRD) investigation. SEM and TEM images revealed spherical shape, with asymmetric geometries for TiO<sub>2</sub> NPs. The micrographs thoroughly corroborated the plate-like structure for the NPs. In order to confirm the average energy gap of TiO<sub>2</sub> NPs, diffused reflectance spectroscopy (DRS) via Kubelka-Monk function was applied (3.66 eV). Navy blue dye was used to study the photocatalytic properties of NPs and discovered to be triggered at 590.9 nm. The photodegradation rate of NB dye decolorized up to 74.04% after 120 min of UV light exposure. The first order kinetics was indicated by a linear relationship between log C/Co and k. The demonstrated rates of photodecoloration for NB under UV light in the presence of scavengers AgNO<sub>3</sub>, ethanol, and ethylenediamine tetraacetic acid (EDTA), were found to be 65.50%, 61.46%, and 57.33%, respectively. Using the carbon paste electrodes and cyclic voltammetry (CV) in 0.1 N HCl solution, the electrochemical characteristics of the obtained sample were studied. The carboxymethyl cellulose sensor made from TiO<sub>2</sub> NPs demonstrated a remarkable sensitivity of 0.08 A. The results showed a high recovery for lead with low% of RSD values. The TiO<sub>2</sub> electrode is a promising electrode material for sensing applications due to its outstanding electrochemical performance.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optoplasmonic biosensor for lung cancer telediagnosis: Design and simulation analysis 用于癌症远程诊断的光等离子体生物传感器的设计与仿真分析

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100232

Alemayehu Getahun Kumela, Abebe Belay Gemta, Alemu Kebede Hordofa, Tamirat Abebe Desta, Mulubirhan Dangish, Habtamu Dagnew Mekonnen

{"title":"Optoplasmonic biosensor for lung cancer telediagnosis: Design and simulation analysis","authors":"Alemayehu Getahun Kumela, Abebe Belay Gemta, Alemu Kebede Hordofa, Tamirat Abebe Desta, Mulubirhan Dangish, Habtamu Dagnew Mekonnen","doi":"10.1016/j.sintl.2023.100232","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100232","url":null,"abstract":"<div><p>Applying quantum technology to dispatch face-to-face medical activities has generated significant interest. Unfortunately, the work on remote medical treatment soliciting quantum medication and information processing techniques is hard to observe. In this research, we proposed the Mach–Zehnder interferometer (MZI) based optoplasmonic biosensors (OPBs) with two homodyne detectors for remote-based lung cancer detection using classical and quantum mechanical principles. From the classical basis (Drude-Lorentz model and Kretschmann configuration), the influence of silver nanoparticles (Ag NPs) layers and biomolecule concentration on the performance of biosensors has been investigated. The different types of cancer cells for CL1-5, A549, and HT-29 have been used to analyze the sensitivity, and 319, 332, and 365 (deg/RIU) have been achieved, respectively. In addition, from quantum mechanical principles, the biosignals were conveyed through quantum teleportation in the form of the quantum state of light via fiber optics cable to enable precise remote detection of lung cancer. The obtained sensitivity and teleportation fidelity clearly reveal, the best candidacy of the proposed optoplasmonic biosensor for lung cancer telediagnosis.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2