Chemosensors最新文献_第4页

New Trend of Amperometric Gas Sensors Using Atomic Gold-Decorated Platinum/Polyaniline Composites 使用原子金装饰铂/聚苯胺复合材料的安培气体传感器新趋势

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-12 DOI: 10.3390/chemosensors12020027

Anifatul Faricha, Parthojit Chakraborty, T. Chang, Masato Sone, Takamichi Nakamoto

{"title":"New Trend of Amperometric Gas Sensors Using Atomic Gold-Decorated Platinum/Polyaniline Composites","authors":"Anifatul Faricha, Parthojit Chakraborty, T. Chang, Masato Sone, Takamichi Nakamoto","doi":"10.3390/chemosensors12020027","DOIUrl":"https://doi.org/10.3390/chemosensors12020027","url":null,"abstract":"The Amperometric Gas Sensor (AGS) uses an electrode as the transducer element which converts its signal into a current from the electrochemical reaction of analytes taking place at the electrode surface. Many attempts to improve AGS performance, such as modifying the working electrode, applying a particular gas-permeable membrane, and selecting the proper electrolyte, etc., have been reported in the scientific literature. On the other hand, in the materials community, atomic gold has gained much attention because its physicochemical properties dramatically differ from those of gold nanoparticles. This paper provides an overview of the use of atomic gold in AGSs, both in a bulky AGS and a miniaturized AGS. In the miniaturized AGS, the system must be redesigned; for example, the aqueous electrolyte commonly used in a bulky AGS cannot be used due to volatility and fluidity issues. A Room Temperature Ionic Liquid (RTIL) can be used to replace the aqueous electrolyte since it has negligible vapor pressure; thus, a thin film of RTIL can be realized in a miniaturized AGS. In this paper, we also explain the possibility of using RTIL for a miniaturized AGS by incorporating a quartz crystal microbalance sensor. Several RTILs coated onto modified electrodes used for isomeric gas measurement are presented. Based on the results, the bulky and miniaturized AGS with atomic gold exhibited a higher sensor response than the AGS without atomic gold.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139783965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Enzymatic Electrochemical Sensing of Glucose with a Carbon Black/Polyaniline/Silver Nanoparticle Composite 利用炭黑/聚苯胺/银纳米颗粒复合材料对葡萄糖进行非酶法电化学传感

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-09 DOI: 10.3390/chemosensors12020026

C. Piñón-Balderrama, Claudia A. Hernández-Escobar, Simón Yobanni Reyes-López, A. S. Conejo-Dávila, A. Estrada-Monje, E. A. Zaragoza-Contreras

{"title":"Non-Enzymatic Electrochemical Sensing of Glucose with a Carbon Black/Polyaniline/Silver Nanoparticle Composite","authors":"C. Piñón-Balderrama, Claudia A. Hernández-Escobar, Simón Yobanni Reyes-López, A. S. Conejo-Dávila, A. Estrada-Monje, E. A. Zaragoza-Contreras","doi":"10.3390/chemosensors12020026","DOIUrl":"https://doi.org/10.3390/chemosensors12020026","url":null,"abstract":"The present work describes the synthesis of an electroactive nanocomposite consisting of carbon black (CB) and polyaniline (PANI) obtained by in situ oxidative polymerization. Monomer P1 was used as a polyaniline precursor. P1 has surfactant properties that allow obtaining core–shell structures dispersed in an aqueous medium. The nanocomposite, together with silver nanoparticles (AgNPs) as an electrocatalytic element, was used to modify the surface of a glassy carbon electrode (GCE) for glucose detection. Electroactive areas were calculated using the Randles–Sevick equation. The results showed that the CB-PANI.1-1/AgNP nanocomposite exhibited a larger electroactive surface area (0.3451 cm2) compared to AgNP alone (0.0973 cm2) or the CB-PANI.1-1 composite (0.2989 cm2). Characterization of CB-PANI.1-1/AgNP, by cyclic voltammetry in the presence of glucose, showed a new oxidation peak with a maximum current close to 0.7 V due to the oxidation of glucose to gluconolactone. The amperometry test at 0.7 V showed a linear response with R2 of 0.999 as a function of the analyte concentration. The glucose sensor presented a linear detection range of 1 to 10 mM, a sensitivity of 41 µA mM−1 cm−2, and a limit of detection (LOD) of 520 µM.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139850878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Easy-to-Use Chemiluminescent-Based Assay for a Rapid and Low-Cost Evaluation of the Antioxidant Activity of Cosmetic Products 基于化学发光的检测方法易于使用，可快速、低成本地评估化妆品的抗氧化活性

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-09 DOI: 10.3390/chemosensors12020025

Seyedeh Rojin Shariati Pour, D. Calabria, A. Nascetti, D. Caputo, G. de Cesare, Massimo Guardigli, M. Zangheri, M. Mirasoli

{"title":"Easy-to-Use Chemiluminescent-Based Assay for a Rapid and Low-Cost Evaluation of the Antioxidant Activity of Cosmetic Products","authors":"Seyedeh Rojin Shariati Pour, D. Calabria, A. Nascetti, D. Caputo, G. de Cesare, Massimo Guardigli, M. Zangheri, M. Mirasoli","doi":"10.3390/chemosensors12020025","DOIUrl":"https://doi.org/10.3390/chemosensors12020025","url":null,"abstract":"New cosmetic formulations are continuously requested by the market and the ingredients are constantly evolving. Recently the use of antioxidants has gained success and, in this context, analytical methods able to quickly and easily assess the antioxidant activity of cosmetics would make it possible to carry out analyses on new formulations even within the manufacturing process without the need for specialized laboratories and personnel, thus evaluating directly on-site the effectiveness and the shelf life of products. In this work, a chemiluminescent inhibition assay was developed for determining the total antioxidant activity in cosmetic products. The method was based on the luminol/enhancers/hydrogen peroxide/horseradish peroxidase chemiluminescent system, which generates light signals measurable through simple and compact instrumentation. The formation of the chemiluminescent signal is inhibited by the presence of antioxidant substances while it is restored once all the antioxidant molecules have been oxidized. The time of appearance of the light signal is related to the total antioxidant activity. The assay was carried out exploiting an integrated device comprising a microwell plate coupled with an array of amorphous silicon hydrogenated photosensors enclosed in a mini-dark box. The method was optimized in terms of concentrations and volumes of the required reagents and sample pre-treatment. A calibration curve was generated taking as a reference the antioxidant activity of ascorbic acid obtaining a detection limit of 10 µM. The developed method was applied to cosmetic products currently on the market as well as on spiked samples in order to evaluate the performance of the methods in terms of sensitivity, accuracy, and reproducibility.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139788160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Easy-to-Use Chemiluminescent-Based Assay for a Rapid and Low-Cost Evaluation of the Antioxidant Activity of Cosmetic Products 基于化学发光的检测方法易于使用，可快速、低成本地评估化妆品的抗氧化活性

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-09 DOI: 10.3390/chemosensors12020025

Seyedeh Rojin Shariati Pour, D. Calabria, A. Nascetti, D. Caputo, G. de Cesare, Massimo Guardigli, M. Zangheri, M. Mirasoli

{"title":"Easy-to-Use Chemiluminescent-Based Assay for a Rapid and Low-Cost Evaluation of the Antioxidant Activity of Cosmetic Products","authors":"Seyedeh Rojin Shariati Pour, D. Calabria, A. Nascetti, D. Caputo, G. de Cesare, Massimo Guardigli, M. Zangheri, M. Mirasoli","doi":"10.3390/chemosensors12020025","DOIUrl":"https://doi.org/10.3390/chemosensors12020025","url":null,"abstract":"New cosmetic formulations are continuously requested by the market and the ingredients are constantly evolving. Recently the use of antioxidants has gained success and, in this context, analytical methods able to quickly and easily assess the antioxidant activity of cosmetics would make it possible to carry out analyses on new formulations even within the manufacturing process without the need for specialized laboratories and personnel, thus evaluating directly on-site the effectiveness and the shelf life of products. In this work, a chemiluminescent inhibition assay was developed for determining the total antioxidant activity in cosmetic products. The method was based on the luminol/enhancers/hydrogen peroxide/horseradish peroxidase chemiluminescent system, which generates light signals measurable through simple and compact instrumentation. The formation of the chemiluminescent signal is inhibited by the presence of antioxidant substances while it is restored once all the antioxidant molecules have been oxidized. The time of appearance of the light signal is related to the total antioxidant activity. The assay was carried out exploiting an integrated device comprising a microwell plate coupled with an array of amorphous silicon hydrogenated photosensors enclosed in a mini-dark box. The method was optimized in terms of concentrations and volumes of the required reagents and sample pre-treatment. A calibration curve was generated taking as a reference the antioxidant activity of ascorbic acid obtaining a detection limit of 10 µM. The developed method was applied to cosmetic products currently on the market as well as on spiked samples in order to evaluate the performance of the methods in terms of sensitivity, accuracy, and reproducibility.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139848145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Enzymatic Electrochemical Sensing of Glucose with a Carbon Black/Polyaniline/Silver Nanoparticle Composite 利用炭黑/聚苯胺/银纳米颗粒复合材料对葡萄糖进行非酶法电化学传感

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-09 DOI: 10.3390/chemosensors12020026

C. Piñón-Balderrama, Claudia A. Hernández-Escobar, Simón Yobanni Reyes-López, A. S. Conejo-Dávila, A. Estrada-Monje, E. A. Zaragoza-Contreras

{"title":"Non-Enzymatic Electrochemical Sensing of Glucose with a Carbon Black/Polyaniline/Silver Nanoparticle Composite","authors":"C. Piñón-Balderrama, Claudia A. Hernández-Escobar, Simón Yobanni Reyes-López, A. S. Conejo-Dávila, A. Estrada-Monje, E. A. Zaragoza-Contreras","doi":"10.3390/chemosensors12020026","DOIUrl":"https://doi.org/10.3390/chemosensors12020026","url":null,"abstract":"The present work describes the synthesis of an electroactive nanocomposite consisting of carbon black (CB) and polyaniline (PANI) obtained by in situ oxidative polymerization. Monomer P1 was used as a polyaniline precursor. P1 has surfactant properties that allow obtaining core–shell structures dispersed in an aqueous medium. The nanocomposite, together with silver nanoparticles (AgNPs) as an electrocatalytic element, was used to modify the surface of a glassy carbon electrode (GCE) for glucose detection. Electroactive areas were calculated using the Randles–Sevick equation. The results showed that the CB-PANI.1-1/AgNP nanocomposite exhibited a larger electroactive surface area (0.3451 cm2) compared to AgNP alone (0.0973 cm2) or the CB-PANI.1-1 composite (0.2989 cm2). Characterization of CB-PANI.1-1/AgNP, by cyclic voltammetry in the presence of glucose, showed a new oxidation peak with a maximum current close to 0.7 V due to the oxidation of glucose to gluconolactone. The amperometry test at 0.7 V showed a linear response with R2 of 0.999 as a function of the analyte concentration. The glucose sensor presented a linear detection range of 1 to 10 mM, a sensitivity of 41 µA mM−1 cm−2, and a limit of detection (LOD) of 520 µM.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139790867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the Metallic Nanoparticles Decoration on Reduced Graphene Oxide-Based Sensors Used to Detect Sulfur Dioxide 研究用于检测二氧化硫的还原氧化石墨烯传感器上的金属纳米颗粒装饰

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-08 DOI: 10.3390/chemosensors12020024

Elisa Ruiz, C. Varenne, B. S. de Lima, T. Gueye, A. Pauly, J. Brunet, V. Mastelaro, A. Ndiaye

{"title":"Investigating the Metallic Nanoparticles Decoration on Reduced Graphene Oxide-Based Sensors Used to Detect Sulfur Dioxide","authors":"Elisa Ruiz, C. Varenne, B. S. de Lima, T. Gueye, A. Pauly, J. Brunet, V. Mastelaro, A. Ndiaye","doi":"10.3390/chemosensors12020024","DOIUrl":"https://doi.org/10.3390/chemosensors12020024","url":null,"abstract":"This paper presents the impact of the decoration of reduced graphene oxide (rGO) with metallic nanoparticles to detect sulfur dioxide (SO2). Copper and platinum were employed to produce metal nanoparticles (NPs) for the chemical and physical decoration of rGO to form the nanocomposites (rGO/NPs). We optimized NP loading by varying the concentrations of metal ions and deposition times for chemical and physical decoration, respectively. The chemical decoration presents a random nanoparticle distribution on the rGO surface with a broad particle size distribution (1 to 100 nm with a majority less than 40 nm). In comparison, the physical decoration presents uniformly distributed nanoparticles with particles of a size between 1 and 20 nm, with a majority less than 10 nm. The chemically decorated structures present the best gas responses and show that lower NP loading provides better responses. The nanocomposites present responses owing to a better synergy between NPs and the rGO surface, combined with the catalytic action of the NPs on the rGO. The physical decoration allows higher NP surface coverage than the chemical one but implies a lower remaining rGO naked surface for gaseous molecule interaction. These results illustrate that the NPs’ surface and the uncovered rGO contribute to the gas response.","PeriodicalId":10057,"journal":{"name":"Chemosensors","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139853741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the Metallic Nanoparticles Decoration on Reduced Graphene Oxide-Based Sensors Used to Detect Sulfur Dioxide 研究用于检测二氧化硫的还原氧化石墨烯传感器上的金属纳米颗粒装饰

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-08 DOI: 10.3390/chemosensors12020024

Elisa Ruiz, C. Varenne, B. S. de Lima, T. Gueye, A. Pauly, J. Brunet, V. Mastelaro, A. Ndiaye

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引用次数: 0

Low-Cost Carbon Paste Cu(II)-Exchanged Zeolite Amperometric Sensor for Hydrogen Peroxide Detection 用于检测过氧化氢的低成本碳浆铜(II)交换沸石安培传感器

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-04 DOI: 10.3390/chemosensors12020023

D. Gligor, S. Maicaneanu, C. Varodi

引用次数: 0

Low-Cost Carbon Paste Cu(II)-Exchanged Zeolite Amperometric Sensor for Hydrogen Peroxide Detection 用于检测过氧化氢的低成本碳浆铜(II)交换沸石安培传感器

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-02-04 DOI: 10.3390/chemosensors12020023

D. Gligor, S. Maicaneanu, C. Varodi

引用次数: 0

Correction: Wei et al. Self-Assembled Corn-Husk-Shaped Fullerene Crystals as Excellent Acid Vapor Sensors. Chemosensors 2022, 10, 16 更正：Wei 等人的自组装玉米须形富勒烯晶体作为出色的酸蒸汽传感器。化学传感器，2022，10，16

IF 4.2 3区工程技术

Chemosensors Pub Date : 2024-01-31 DOI: 10.3390/chemosensors12020021

Zexuan Wei, Jingwen Song, Renzhi Ma, Katsuhiko Ariga, L. Shrestha

引用次数: 0