Electroanalysis最新文献

{"title":"Electrochemical Determination of Clofazimine Using A Carbon Dot Polythionine Nanocomposite-Modified Screen-Printed Electrode","authors":"Ashiqa Fakier-Lesch,&nbsp;Rachel Fanelwa Ngece-Ajayi,&nbsp;Nuralli Mohamed,&nbsp;Candice Cupido","doi":"10.1002/elan.202400278","DOIUrl":"https://doi.org/10.1002/elan.202400278","url":null,"abstract":"<p>Multi-drug resistant tuberculosis (MDR-TB) treatment presents significant challenges for diagnosed patients, primarily due to the harsh side effects associated with treatment coupled with time-consuming diagnostic techniques used to assess emergencies that arise from drug toxicity. Monitoring the antibiotics used in these treatments is vital to better understand the dosage requirements for affected patients. This study focuses on the fabrication, characterisation and sensor application of carbon dot polythionine (CDPTh) nanocomposites for the electrochemical detection of clofazimine (CFZ), a drug used in MDR-TB treatment. CDPTh nanocomposites were electrochemically fabricated on a screen-printed carbon electrode (SPCE) and demonstrated optimal performance at pH 4.00, which provided the highest current response compared to other pH values. The sensor was further characterised using ultraviolet–visible light spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FTIR), high-resolution scanning electron microscopy (HR-SEM) and energy-dispersive X-ray spectroscopy (EDX). Electrochemical techniques, such as cyclic voltammetry (CV) and square-wave voltammetry (SWV), were employed to optimise the sensor parameters. The surface concentration and diffusion coefficient of the CDPTh-modified electrodes were determined to be 2.125 × 10⁻⁷ mol cm⁻² and 2.063 × 10⁻⁸ cm² s⁻¹, respectively. Stability testing using CV indicated that the nanocomposite remained 60% stable for 12 h, with a noticeable decrease in current observed thereafter. CFZ was effectively detected after the sensor fabrication within the linear range of 100–1300 nM. Interference studies were performed with chlorine ions and oxygen that were present in the phosphate buffer solution (PBS), as oxygen is always available and chlorine ions are commonly found in the water used to prepare PBS. The CDPTh sensor successfully determined CFZ using SWV anodic scans, achieving a limit of detection (LOD) of 24.4 nM and a limit of quantification (LOQ) of 81.4 nM.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202400278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Signal-On Photoelectrochemical Immunosensor Based On Bi2MoO6 Nanosheets for Carcinoembryonic Antigen Analysis","authors":"Yue Chen,&nbsp;Bin Li,&nbsp;Lilin Ge,&nbsp;Fan Cai,&nbsp;Yao Lin","doi":"10.1002/elan.202400357","DOIUrl":"https://doi.org/10.1002/elan.202400357","url":null,"abstract":"<p>Herein, a Bi₂MoO₆ nanosheet (BMONS)-based sensing platform for signal-on photoelectrochemical (PEC) detection of carcinoembryonic antigen (CEA) is successfully constructed by employing an enzyme-catalyzed reaction as the signal amplification method. Specifically, as the CEA concentration escalates, a substantial accumulation of immunological complexes is triggered by the interaction between antigens and antibodies, which promptly concentrate glucose oxidase (GOD) within the wells of a 96-well microplate. These sequestered GOD molecules subsequently catalyze the hydrolysis of glucose to yield H₂O₂, an efficient hole scavenger, leading to significant amplification of the PEC response from the photosensitive materials. Under meticulously optimized conditions, a broad linear detection range spanning from 0.05 to 50 ng mL^–1 with a low limit of detection of 0.023 ng mL^–1 is realized for the detection of CEA. This exceptional performance underscores the successful implementation and efficacy of the BMONS-based PEC-sensing platform, which offers promising avenues for sensitive and selective biomarker detection.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Signal-On Photoelectrochemical Immunosensor Based On Bi2MoO6 Nanosheets for Carcinoembryonic Antigen Analysis","authors":"Yue Chen,&nbsp;Bin Li,&nbsp;Lilin Ge,&nbsp;Fan Cai,&nbsp;Yao Lin","doi":"10.1002/elan.202400357","DOIUrl":"https://doi.org/10.1002/elan.202400357","url":null,"abstract":"<p>Herein, a Bi₂MoO₆ nanosheet (BMONS)-based sensing platform for signal-on photoelectrochemical (PEC) detection of carcinoembryonic antigen (CEA) is successfully constructed by employing an enzyme-catalyzed reaction as the signal amplification method. Specifically, as the CEA concentration escalates, a substantial accumulation of immunological complexes is triggered by the interaction between antigens and antibodies, which promptly concentrate glucose oxidase (GOD) within the wells of a 96-well microplate. These sequestered GOD molecules subsequently catalyze the hydrolysis of glucose to yield H₂O₂, an efficient hole scavenger, leading to significant amplification of the PEC response from the photosensitive materials. Under meticulously optimized conditions, a broad linear detection range spanning from 0.05 to 50 ng mL^–1 with a low limit of detection of 0.023 ng mL^–1 is realized for the detection of CEA. This exceptional performance underscores the successful implementation and efficacy of the BMONS-based PEC-sensing platform, which offers promising avenues for sensitive and selective biomarker detection.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Optimizing Microstructure and Electrochemical Performance","authors":"Zesheng Li,&nbsp;Qiuyu Lu,&nbsp;Zian Xu,&nbsp;Yu Wang,&nbsp;Hsing-Lin Wang","doi":"10.1002/elan.202400369","DOIUrl":"https://doi.org/10.1002/elan.202400369","url":null,"abstract":"<p>The development of sodium-ion batteries (SIBs) as a sustainable alternative to lithium-ion batteries has garnered considerable attention, mainly due to the abundant supply and economic viability of sodium sources. In this study, we present the synthesis and characterization of hard carbon (HC) derived from biomass coconut shells, with the objective of optimizing its performance as an anode material for SIBs. A series of HC samples (denoted as YHC-T) were prepared via carbonization at 1000°C, 1100°C, 1200°C, 1300°C, and 1400°C. The YHC-1200 sample, exhibiting an expanded interlayer spacing of approximately 0.384 nm, demonstrated superior sodium storage properties, achieving a high reversible specific capacity of 350 mA h g⁻¹ and an initial Coulombic efficiency of 92.9% at a current density of 0.1 A g⁻¹. Moreover, YHC-1200 exhibited excellent cycling stability, retaining a capacity of 198 mAh g⁻¹ after 1000 cycles at 1 A g⁻¹.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover Picture: (Electroanalysis 11/2024)","authors":"","doi":"10.1002/elan.202481101","DOIUrl":"10.1002/elan.202481101","url":null,"abstract":"<p>Cover picture provided by Dr. Elena Benito-Peña and Dr. Susana Campuzano. <i>Electroanalysis</i> covers all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with analytical voltammetry, potentiometry, new electrochemical sensors and detection schemes, nanoscale electrochemistry, advanced electromaterials, nanobioelectronics, point-of-care diagnostics, wearable sensors, and practical applications.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 11","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202481101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Nanoporous Gold Film: A Novel Electrochemical Sensor for Germanium (II)","authors":"Luis A. Rojas,&nbsp;Arnoldo Vizcarra,&nbsp;Lucas Patricio Hernández-Saravia","doi":"10.1002/elan.202400292","DOIUrl":"https://doi.org/10.1002/elan.202400292","url":null,"abstract":"<p>In this work, the fabrication of a high surface area nanoporous gold (NPG) structures on the surface of a gold electrode using a facile and green electrochemical approach via anodization–reduction method for germanium (Ge) determination is presented. The characterization of the NPG was analyzed by cyclic voltammetry, field emission scanning electron microscopy, and X-ray diffraction techniques. Voltammetry showed an improved sensitivity for Ge (II) oxidation at this electrode when compared to a bare electrode, with a peak near to –1.3 V (vs. Ag/AgCl) at a scan rate of 100 mV s⁻¹. The square wave anodic stripping voltammetry shows a response that is linear in the 10–40 μg L⁻¹ Ge (II) concentration range, with a 1.53 μg L⁻¹ limit of detection and 4.65 μg L⁻¹ limit of quantification. The reproducibility and repeatability were assessed, and acceptable performance was achieved.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Optimizing Microstructure and Electrochemical Performance","authors":"Zesheng Li,&nbsp;Qiuyu Lu,&nbsp;Zian Xu,&nbsp;Yu Wang,&nbsp;Hsing-Lin Wang","doi":"10.1002/elan.202400369","DOIUrl":"https://doi.org/10.1002/elan.202400369","url":null,"abstract":"<p>The development of sodium-ion batteries (SIBs) as a sustainable alternative to lithium-ion batteries has garnered considerable attention, mainly due to the abundant supply and economic viability of sodium sources. In this study, we present the synthesis and characterization of hard carbon (HC) derived from biomass coconut shells, with the objective of optimizing its performance as an anode material for SIBs. A series of HC samples (denoted as YHC-T) were prepared via carbonization at 1000°C, 1100°C, 1200°C, 1300°C, and 1400°C. The YHC-1200 sample, exhibiting an expanded interlayer spacing of approximately 0.384 nm, demonstrated superior sodium storage properties, achieving a high reversible specific capacity of 350 mA h g⁻¹ and an initial Coulombic efficiency of 92.9% at a current density of 0.1 A g⁻¹. Moreover, YHC-1200 exhibited excellent cycling stability, retaining a capacity of 198 mAh g⁻¹ after 1000 cycles at 1 A g⁻¹.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Nanoporous Gold Film: A Novel Electrochemical Sensor for Germanium (II)","authors":"Luis A. Rojas,&nbsp;Arnoldo Vizcarra,&nbsp;Lucas Patricio Hernández-Saravia","doi":"10.1002/elan.202400292","DOIUrl":"https://doi.org/10.1002/elan.202400292","url":null,"abstract":"<p>In this work, the fabrication of a high surface area nanoporous gold (NPG) structures on the surface of a gold electrode using a facile and green electrochemical approach via anodization–reduction method for germanium (Ge) determination is presented. The characterization of the NPG was analyzed by cyclic voltammetry, field emission scanning electron microscopy, and X-ray diffraction techniques. Voltammetry showed an improved sensitivity for Ge (II) oxidation at this electrode when compared to a bare electrode, with a peak near to –1.3 V (vs. Ag/AgCl) at a scan rate of 100 mV s⁻¹. The square wave anodic stripping voltammetry shows a response that is linear in the 10–40 μg L⁻¹ Ge (II) concentration range, with a 1.53 μg L⁻¹ limit of detection and 4.65 μg L⁻¹ limit of quantification. The reproducibility and repeatability were assessed, and acceptable performance was achieved.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RETRACTION: Copper Oxide Nanoparticles with Graphitic Carbon Nitride for Ultrasensitive Photoelectrochemical Aptasensor of Bisphenol A","authors":"","doi":"10.1002/elan.202480141","DOIUrl":"10.1002/elan.202480141","url":null,"abstract":"<p><b>Retraction</b>: L. Yang, Z. Zhao, J. Hu, H. Wang, J. Dong, X. Wan, Z. Cai, M. Li, “Copper Oxide Nanoparticles with Graphitic Carbon Nitride for Ultrasensitive Photoelectrochemical Aptasensor of Bisphenol A,” <i>Electroanalysis</i> 32, no. 7 (2020): 1651–1658. https://doi.org/10.1002/elan.201900638.</p><p>The above article, published online on 03 February 2020, in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the journal Editor-in-Chief, Greg M. Swain; and Wiley-VCH GmbH. The authors submitted a report to the journal stating that the conclusions presented in the article could not be replicated with further experimentation and requesting a withdrawal of their article. Following the author‘s report, the publisher was informed by a third party of evidence of image manipulation in Figure 1A. In addition, a third party indicated that images in Figure 2 and Figure 3 had been reused and manipulated from a previous publication by different authors. The retraction has been agreed to because the evidence of image manipulation and duplication across different articles fundamentally compromises the journal‘s confidence in the data and conclusions presented in the article. The authors agree with retraction.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"36 11","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elan.202480141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142674174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of N-Doped Graphene-Coated CoxNiy Alloy by Laser Induced CoxNiy-MOFs for Detection of Gallic Acid","authors":"Haixu Wang,&nbsp;Xiaoyu Wu,&nbsp;Yuxin Lin,&nbsp;Qiyao Ren,&nbsp;Bo Peng,&nbsp;Weiwei Luo,&nbsp;Quanping Diao,&nbsp;Ruifeng Ma,&nbsp;Zhen Sun,&nbsp;Xiaonan Qi","doi":"10.1002/elan.202400336","DOIUrl":"https://doi.org/10.1002/elan.202400336","url":null,"abstract":"<p>Thermal annealing needs protective gas environment, high pyrolysis temperature and long synthesis period. In this work, Co_xNi_y/PNG nanocomposites were prepared by laser induced Co_xNi_y-MOFs at room temperature and in air environment for the first time. In contrast to Co/PNG and Ni/PNG, Co_xNi_y/PNG exhibits enhanced electrocatalytic activity for the oxidation of gallic acid. The optimal sensor presents a broad linear range of 0.7–120 μM (R²=0.993, with a sensitivity of 0.031 μA/μM) and a low detection limit of 0.13 μM. Meanwhile, the detection results of gallic acid in actual samples by this sensor are satisfactory. This method is simple and feasible and can provide a new idea and method for the rapid preparation of novel nanocatalysts in room temperature and air.</p>","PeriodicalId":162,"journal":{"name":"Electroanalysis","volume":"37 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}