ECS sensors plus最新文献_第7页

Potentiometric Analysis of Benzalkonium Chloride with 3D Printed Ion-Selective Membranes 3D打印离子选择膜对苯扎氯铵的电位分析

ECS sensors plus Pub Date : 2022-07-26 DOI: 10.1149/2754-2726/ac8438

Nguyen H. B. Ho, Dalton L. Glasco, J. G. Bell

{"title":"Potentiometric Analysis of Benzalkonium Chloride with 3D Printed Ion-Selective Membranes","authors":"Nguyen H. B. Ho, Dalton L. Glasco, J. G. Bell","doi":"10.1149/2754-2726/ac8438","DOIUrl":"https://doi.org/10.1149/2754-2726/ac8438","url":null,"abstract":"Benzalkonium (BA+) chloride is one of the most common preservatives used in prescription-based and over-the-counter eye drops. Knowing the concentration of BA+ in eye drops is important for both quality control (at the pharmaceutical preparation stage) and human health (ocular toxicity has been linked to BA+ use). This paper describes the design and fabrication of a benzalkonium-selective potentiometric sensor for the determination of BA+ in ophthalmic solutions. The sensor is composed of a 3D-printed ion-selective membrane (ISM) that selectively measures BA+ in the presence of potentially interfering ions routinely found in ophthalmic formulations (i.e., Mg2+, Ca2+, Na+ and K+). The 3D printed BA+-ion-selective electrodes (ISEs) produced a Nernstian response of 55 mV/Decade across a range of 1.0 mM to 31.0 μM BA+ along with an LOD of 8 μM, which covers the relevant concentration range found in ophthalmic solutions. The 3D printed BA+-ISEs proved to be highly stable with an average drift of 205 μV/hr. Successful measurement of BA+ in diluted ophthalmic solutions was completed from 100–500 μM. The mass production capability afforded by 3D-printing offers a unique and intriguing fabrication protocol for developing low-cost sensors which could be incorporated quickly and seamlessly by pharmaceutical companies or community-based pharmacies.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45995267","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: 3

Review—A Nanomaterial-Based Sensor for Detecting the COVID-19 Virus through Various Techniques 基于纳米材料的新型冠状病毒检测技术综述

ECS sensors plus Pub Date : 2022-07-26 DOI: 10.1149/2754-2726/ac8436

Tran Thanh Tam Toan, D. Nguyen

引用次数: 6

MnO2-SnO2 Based Liquefied Petroleum Gas Sensing Device for Lowest Explosion Limit Gas Concentration 基于MnO2-SnO2的最低爆炸极限气体浓度液化石油气传感装置

ECS sensors plus Pub Date : 2022-07-26 DOI: 10.1149/2754-2726/ac8437

Ajeet Singh, A. Verma, B. Yadav

{"title":"MnO2-SnO2 Based Liquefied Petroleum Gas Sensing Device for Lowest Explosion Limit Gas Concentration","authors":"Ajeet Singh, A. Verma, B. Yadav","doi":"10.1149/2754-2726/ac8437","DOIUrl":"https://doi.org/10.1149/2754-2726/ac8437","url":null,"abstract":"In this work, MnO2-SnO2 nanocomposite based below lower exposure limit (0.5–2.0 vol%) sensing device for liquefied petroleum gas (LPG) is reported. The synthesized material is highly crystalline with an average crystallite size of 16.786 nm, confirmed by the X-ray diffraction pattern. Williamson-Hall plot shows that the induced strain of 2.627 × 10−4, present in the nanocomposite, lies between the induced strains of both of its constituents. The XRD pattern of nanocomposite contains the cubic phase of MnO2 and the tetragonal phase of SnO2. Tauc plot shows the optical energy band gap of MnO2, SnO2, and MnO2-SnO2 of 3.407 eV, 3.037 eV, and 3.202 eV respectively. The surface morphological investigation shows the brush-like structure which enhances sensor performance by providing activation sites. The energy dispersive X-ray (EDS) spectrum found that materials are highly pure because other peaks are not observed. The functional group analysis by using FTIR found to be Sn–O and Mn–O both vibration bands existed. The highest sensor response was found to be 2.42 for 2.0 vol% whereas for a lower concentration of 0.5 vol% the sensor response was observed to be 1.44. The fast response and recovery of this sensing device were found to17.30 and 23.25 s respectively for 0.5 vol% of LPG.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47325752","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: 17

Passive Sweat-Based Pruritic Cytokine Detection and Monitoring System 基于被动汗液的瘙痒细胞因子检测与监测系统

ECS sensors plus Pub Date : 2022-07-20 DOI: 10.1149/2754-2726/ac82bc

Sayali Upasham, Paul Rice, Sarah Shahub, V. N. Dhamu, Shalini Prasad

引用次数: 3

Identifying Hypocalcemia in Dairy Cattle by Combining 3D Printing and Paper Diagnostics 3D打印与纸质诊断相结合识别奶牛低钙血症

ECS sensors plus Pub Date : 2022-07-07 DOI: 10.1149/2754-2726/aca034

Art Matthew Mamaril, Dalton L. Glasco, F. L. Leal Yepes, J. G. Bell

{"title":"Identifying Hypocalcemia in Dairy Cattle by Combining 3D Printing and Paper Diagnostics","authors":"Art Matthew Mamaril, Dalton L. Glasco, F. L. Leal Yepes, J. G. Bell","doi":"10.1149/2754-2726/aca034","DOIUrl":"https://doi.org/10.1149/2754-2726/aca034","url":null,"abstract":"This paper describes the design, fabrication, and validation of a paper-based diagnostic device for the rapid diagnosis of hypocalcemia in dairy cattle at the point-of-care (POC). The device incorporates a 3D printed calcium ion-selective membrane (ISM) as the sensing element for free—unbound—calcium in real bovine whole blood samples. With a linear response range of 100 mM to 97.7 μM, the sensor covers the clinically relevant concentrations of Ca2+ associated with both healthy cattle as well as those suffering from hypocalcemia. The components of the Ca2+ ion-selective electrodes were successfully translated to a paper-based device to provide a sensing platform that is simple to use, disposable, and low-cost, and is therefore well-situated for applications at the POC. The paper-based calcium sensor showed a Nernstian response between 10 mM and 100 μM and required only 12 μl of sample to perform a measurement, which can be accomplished in less than two minutes without the need for time-consuming separation steps. The performance of the paper-based Ca2+ sensor was validated using the commercially available epoc® Blood Analysis System, which provided results within 5% of the data obtained with 3D printed Ca2+-ISM integrated paper-based device.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41892338","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

Electrochemical Detection of H2O2 Using an Activated Glassy Carbon Electrode 活性玻碳电极电化学检测H2O2

ECS sensors plus Pub Date : 2022-06-28 DOI: 10.1149/2754-2726/ac7c78

P. Murugan, Ramila D. Nagarajan, A. Sundramoorthy, Dhanraj M. Ganapathy, R. Atchudan, D. Nallaswamy, A. Khosla

{"title":"Electrochemical Detection of H2O2 Using an Activated Glassy Carbon Electrode","authors":"P. Murugan, Ramila D. Nagarajan, A. Sundramoorthy, Dhanraj M. Ganapathy, R. Atchudan, D. Nallaswamy, A. Khosla","doi":"10.1149/2754-2726/ac7c78","DOIUrl":"https://doi.org/10.1149/2754-2726/ac7c78","url":null,"abstract":"Hydrogen peroxide (H2O2) is extensively used for sterilization purposes in the food industries and pharmaceuticals as an antimicrobial agent. According to the Food and Agriculture Organization (FAO), the permissible level of H2O2 in milk is in the range of 0.04 to 0.05% w/v, so it has been prohibited to use as a preservative agent. Herein, we reported the electrochemical sensing of H2O2 in milk samples using an activated glassy carbon electrode (AGCE). For this purpose, activation of GCE was carried out in 0.1 M H2SO4 by continuous potential sweeping between −0.7 to 1.8 V for 25 cycles. The AGCE showed a redox peak at -0.18 V in the neutral medium corresponding to the quinone functional groups present on the electrode surface. AGCE was studied in (pH 7.4) 0.1 M PBS for the electro-catalysis of H2O2. The surface of the activated electrode was analysed by Raman spectroscopy and contact angle measurements. In addition, for the activated surface, the contact angle was found to be 85° which indicated the hydrophilic nature of the surface. The different optimization parameters such as (1) effect of electrolyte ions, (2) electrooxidation cycles, and (3) oxidation potential windows were studied to improve the activation process. Finally, AGCE was used to detect H2O2 from 0.1 to 10 mM and the limit of detection (LOD) was found to be 0.053 mM with a linear correlation coefficient (R2) of 0.9633. The selectivity of the sensor towards H2O2 was carried out in the presence of other interferents. The sensitivity of the AGCE sensor was calculated as 17.16 μA mol cm−2. Finally, the commercial application of the sensor was verified by testing it in milk samples with H2O2 in the recovery range of 95%–98%.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47618643","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: 20

Review—Electrochemistry and Other Emerging Technologies for Continuous Glucose Monitoring Devices 电化学和其他用于连续血糖监测设备的新兴技术

ECS sensors plus Pub Date : 2022-06-21 DOI: 10.1149/2754-2726/ac7abb

Saroj Kumar Das, Kavya K. Nayak, P. Krishnaswamy, Vinay Kumar, N. Bhat

{"title":"Review—Electrochemistry and Other Emerging Technologies for Continuous Glucose Monitoring Devices","authors":"Saroj Kumar Das, Kavya K. Nayak, P. Krishnaswamy, Vinay Kumar, N. Bhat","doi":"10.1149/2754-2726/ac7abb","DOIUrl":"https://doi.org/10.1149/2754-2726/ac7abb","url":null,"abstract":"Diabetes leads to chronic microvascular complications for the heart, kidney, and eyes due to uncontrolled glycemic fluctuations. Self-monitoring blood glucose meters can only provide a snapshot of glucose level and are incapable of capturing the granular glucose fluctuations over the 24 h in day. The clinical research has indicated that random blood glucose fluctuations can lead to organ damage. In pursuit of better glucose management, Continuous Glucose Monitoring (CGM) is emerging as a popular alternative owing to its ability to detect instantaneous changes in glucose levels and to alert the users of impending hypo- or hyper-glycemic events. In the last decade, several CGM devices have been launched in the market based on different glucose sensing chemistries and techniques. More research is still needed to come up with novel bio sensing concepts to make CGM low cost and highly accurate. Here, we elaborate the CGM techniques such as electrochemical, optical, reverse iontophoresis, microdialysis, and impedance spectroscopy. We emphasize on the widely used electrochemical CGMs with a focus on sensor design and bio-compatibility. We also provide an outlook for the future technologies, highlighting the need for innovative materials, possibility of integrating with the Internet of Things (IoT) for real-time e-health monitoring.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42159204","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: 17

Thermal Monitoring of Series and Parallel Connected Lithium-ion Battery Modules Using Fiber Optic Sensors 利用光纤传感器对串联和并联锂离子电池模块的热监测

ECS sensors plus Pub Date : 2022-06-21 DOI: 10.1149/2754-2726/ac7abd

H. Atchison, Zachary Bailey, D. Wetz, Matthew Davis, J. Heinzel

{"title":"Thermal Monitoring of Series and Parallel Connected Lithium-ion Battery Modules Using Fiber Optic Sensors","authors":"H. Atchison, Zachary Bailey, D. Wetz, Matthew Davis, J. Heinzel","doi":"10.1149/2754-2726/ac7abd","DOIUrl":"https://doi.org/10.1149/2754-2726/ac7abd","url":null,"abstract":"Lithium-ion batteries are widely deployed in commercial and industrial applications. Continuous monitoring is necessary to prevent destructive results that can occur due to thermal runaway. Thermocouples and thermistors are traditional sensors used for thermally monitoring cells, modules, and batteries, but they only sense changes at the physical point where they are deployed. A high density of these sensors within a module or battery is desirable but also impractical. The study documented here shows that a commercial grade fiber optic sensor can be used as a practical replacement for multiple discrete thermocouples or strain gauges for a battery or module, to monitor a battery module at millimeter resolution along the fiber length. It is shown here that multiple fiber optic sensors can be series connected to allow for monitoring of a battery consisting of more than one module. In addition, it is shown that the same type of fiber can also be used to identify the onset of fault conditions by correlating the response in a fiber optic sensor suspended close to the module with an audible signature detected by a microphone at the time of failure. Early detection and identification of abnormal cell operation is demonstrated within batteries employing many cells.","PeriodicalId":72870,"journal":{"name":"ECS sensors plus","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45158119","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

An Efficient Framework for Detection and Classification of IoT Botnet Traffic 一种高效的物联网僵尸网络流量检测与分类框架

ECS sensors plus Pub Date : 2022-06-21 DOI: 10.1149/2754-2726/ac7abc

Sandeep Maurya, Santosh Kumar, Umang Garg, M. Kumar

引用次数: 7

Review–A Survey of Learning from Noisy Labels 综述——从嘈杂标签中学习的调查

ECS sensors plus Pub Date : 2022-06-06 DOI: 10.1149/2754-2726/ac75f5

Xuefeng Liang, Xingyu Liu, Longshan Yao

引用次数: 7