Heparin-stabilized gold nanoparticles embedded in graphene for the electrochemical determination of esculetin

da Silva, Vinicius José; Baumgarten, Luan Gabriel; Dreyer, Juliana Priscila; Santana, Edson Roberto; Spinelli, Almir; Winiarski, João Paulo; Vieira, Iolanda Cruz

doi:10.1039/d4ay00229f

Anal. Methods

2024

DOI: 10.1039/d4ay00229f

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Heparin-stabilized gold nanoparticles embedded in graphene for the electrochemical determination of esculetin

Vinicius José da Silva,

Luan Gabriel Baumgarten,

Juliana Priscila Dreyer

et al.

Abstract: A conductive nanocomposite consisting of heparin-stabilized gold nanoparticles embedded in graphene was prepared and characterized to develop an electrochemical sensor for the determination of esculetin in tea and jam samples....

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Cited by 3 publications

References 55 publications

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Yihun,

Aragaw,

Tsegaye

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International Journal of Electrochemical Science

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A highly sensitive and selective electrochemical sensor based on polythiourea modified glassy carbon electrode for detecting fenitrothion in vegetables

Yihun,

Aragaw,

Tsegaye

et al. 2024

International Journal of Electrochemical Science

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Anti – intercellular adhesion molecule-1(ICAM-1) nanoparticles for damaged endothelium to treat venous thromboembolism

Pazhani,

Arumugam,

Dharmian

et al. 2024

Journal of Dispersion Science and Technology

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Simultaneous Determination of Aflatoxin B1 and Ochratoxin A in Cereals by a Novel Electrochemical Aptasensor Using Metal–Organic Framework as Signal Carrier

Xu,

Jia,

Yang

et al. 2024

Foods

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A novel electrochemical aptasensor was prepared for the simultaneous determination of aflatoxin B1 (AFB1) and ochratoxin A (OTA). Composites of Au nanoparticles and polyethyleneimine-reduced graphene oxide (AuNPs/PEI-RGO) with good electrical conductivity and high specific surface area were employed as the supporting substrate, demonstrating the ability to provide more binding sites for aptamers and accelerate the electron transfer. Aptamers were immobilized on a AuNPs/PEI-RGO surface to specifically recognize AFB1 and OTA. A metal–organic framework of UiO-66-NH2 served as the signal carrier to load metal ions of Cu2+ and Pb2+, which facilitated the generation of independent current peaks and effectively improved the electrochemical signals. The prepared aptasensor exhibited sensitive current responses for AFB1 and OTA with a linear range of 0.01 to 1000 ng/mL, with detection limits of 6.2 ng/L for AFB1 and 3.7 ng/L for OTA, respectively. The aptasensor was applied to detect AFB1 and OTA in cereal samples, achieving results comparable with HPLC-MS, with recovery results from 92.5% to 104.1%. With these merits of high sensitivity and good selectivity and stability, the prepared aptasensor proved to be a powerful tool for evaluating contaminated cereals.

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Heparin-stabilized gold nanoparticles embedded in graphene for the electrochemical determination of esculetin

Abstract: A conductive nanocomposite consisting of heparin-stabilized gold nanoparticles embedded in graphene was prepared and characterized to develop an electrochemical sensor for the determination of esculetin in tea and jam samples....

Cited by 3 publications

References 55 publications

A highly sensitive and selective electrochemical sensor based on polythiourea modified glassy carbon electrode for detecting fenitrothion in vegetables

A highly sensitive and selective electrochemical sensor based on polythiourea modified glassy carbon electrode for detecting fenitrothion in vegetables

Anti – intercellular adhesion molecule-1(ICAM-1) nanoparticles for damaged endothelium to treat venous thromboembolism

Simultaneous Determination of Aflatoxin B1 and Ochratoxin A in Cereals by a Novel Electrochemical Aptasensor Using Metal–Organic Framework as Signal Carrier

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