A novel colorimetric method for H2O2 sensing and its application: Fe2+-catalyzed H2O2 prevents aggregation of AuNPs by oxidizing cysteine (FeHOAuC)

Liu, Yu; Cao, Yanan; Zhang, Cong; Cheng, Ya; Bian, Qinglai; Cheng, Xue; Xia, Hui; Zheng, Junping; Hu, Haiming

doi:10.1016/j.aca.2022.339840

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…However, the oxidant-aided direct oxidation of cysteine to cystine is a slow process. To improve the reaction rate between H2O2 or O2 and cysteine, several species have been be utilized as catalysts to accelerate the oxidation of cysteine, including I − [35,36], Cu 2+ [37], Fe 2+ [38], and G-quadruplex/hemin chloride complexes [39,40]. In addition, substances with reversible redox activities can serve as redox mediators to develop redox cycling-based colorimetric methods.…”

Section: Colorimetric Methodsmentioning

confidence: 99%

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Feng,

Gao,

et al. 2024

Biosensors

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Optical bioassays are challenged by the growing requirements of sensitivity and simplicity. Recent developments in the combination of redox cycling with different optical methods for signal amplification have proven to have tremendous potential for improving analytical performances. In this review, we summarized the advances in optical bioassays based on the signal amplification of redox cycling, including colorimetry, fluorescence, surface-enhanced Raman scattering, chemiluminescence, and electrochemiluminescence. Furthermore, this review highlighted the general principles to effectively couple redox cycling with optical bioassays, and particular attention was focused on current challenges and future opportunities.

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Section: Colorimetric Methodsmentioning

confidence: 99%

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Feng,

Gao,

et al. 2024

Biosensors

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“…At present, many scholars have developed a variety of methods to test H 2 O 2 , such as fluorescence method, [7][8][9] spectrophotometer method, 10 colorimetry, 11,12 titration, 13 electrochemical sensor, [14][15][16][17][18] and so forth. Among them, electrochemical sensors have become a research hotspot in recent years because of their simple preparation, high sensitivity, [19][20][21] and fast response.…”

Section: Introductionmentioning

confidence: 99%

Preparation of conductive polyaniline hydrogels co‐doped with hydrochloric acid/phytic acid and their application in Ag NPs@PA/GCE biosensor for H₂O₂ detection

Zhang

Wang

Liu

et al. 2023

J of Applied Polymer Sci

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Accurate measurement of hydrogen peroxide is of great significance in monitoring human diseases and environmental safety. At present, there are a variety of testing methods, among which the use of electrochemical sensors to accurately measure hydrogen peroxide has gradually become a research hotspot. In this article, phytic acid (PA) with dual functions of doping and cross-linking and HCl with strong ionization capacity was introduced as dopants to co-doping polyaniline, and polyaniline hydrogel with a three-dimensional network structure was prepared. The influence of the HCl/PA co-doping ratio on conductive polyaniline hydrogel (CPAniH) was explored. The synthesis process and mechanism of HCl/PA-CPAniH were analyzed and explained. In addition, the conductivity and mechanism of HCl/PA-CPAniH, as well as the hydrogel characteristics were characterized and studied. A new electrochemical sensor based on polyaniline hydrogel and silver nanoparticles was constructed to detect hydrogen peroxide. The sensor has a good linear relationship, a wide linear range, and a high-detection limit for H 2 O 2 . In addition, it also shows that HCl/PA-CPAniH is a good interface material for electrochemical sensors and has a certain application potential.

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“…To quantitatively analyze the captured images of the detection area, various methods have been employed to determine the concentration of the target analyte [58][59][60]. Colorimetric images can be analyzed by examining the color information, such as Red, Green, and Blue (RGB) values, to establish a linear relationship between a single RGB value and the concentration of the target analyte [61].…”

Section: Introductionmentioning

confidence: 99%

Advances in Non-Electrochemical Sensing of Human Sweat Biomarkers: From Sweat Sampling to Signal Reading

Yang,

Sun,

Lai

et al. 2023

Biosensors

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Sweat, commonly referred to as the ultrafiltrate of blood plasma, is an essential physiological fluid in the human body. It contains a wide range of metabolites, electrolytes, and other biologically significant markers that are closely linked to human health. Compared to other bodily fluids, such as blood, sweat offers distinct advantages in terms of ease of collection and non-invasive detection. In recent years, considerable attention has been focused on wearable sweat sensors due to their potential for continuous monitoring of biomarkers. Electrochemical methods have been extensively used for in situ sweat biomarker analysis, as thoroughly reviewed by various researchers. This comprehensive review aims to provide an overview of recent advances in non-electrochemical methods for analyzing sweat, including colorimetric methods, fluorescence techniques, surface-enhanced Raman spectroscopy, and more. The review covers multiple aspects of non-electrochemical sweat analysis, encompassing sweat sampling methodologies, detection techniques, signal processing, and diverse applications. Furthermore, it highlights the current bottlenecks and challenges faced by non-electrochemical sensors, such as limitations and interference issues. Finally, the review concludes by offering insights into the prospects for non-electrochemical sensing technologies. By providing a valuable reference and inspiring researchers engaged in the field of sweat sensor development, this paper aspires to foster the creation of innovative and practical advancements in this domain.

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A novel colorimetric method for H2O2 sensing and its application: Fe2+-catalyzed H2O2 prevents aggregation of AuNPs by oxidizing cysteine (FeHOAuC)

Cited by 9 publications

References 35 publications

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Preparation of conductive polyaniline hydrogels co‐doped with hydrochloric acid/phytic acid and their application in Ag NPs@PA/GCE biosensor for H₂O₂ detection

Advances in Non-Electrochemical Sensing of Human Sweat Biomarkers: From Sweat Sampling to Signal Reading

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A novel colorimetric method for H2O2 sensing and its application: Fe2+-catalyzed H2O2 prevents aggregation of AuNPs by oxidizing cysteine (FeHOAuC)

Cited by 9 publications

References 35 publications

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Optical Bioassays Based on the Signal Amplification of Redox Cycling

Preparation of conductive polyaniline hydrogels co‐doped with hydrochloric acid/phytic acid and their application in Ag NPs@PA/GCE biosensor for H2O2 detection

Advances in Non-Electrochemical Sensing of Human Sweat Biomarkers: From Sweat Sampling to Signal Reading

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Preparation of conductive polyaniline hydrogels co‐doped with hydrochloric acid/phytic acid and their application in Ag NPs@PA/GCE biosensor for H₂O₂ detection