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Cited by 84Advanced biosensing and bioanalysis techniquesElectrochemical sensors and biosensorsElectrochemical Analysis and Applications

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A novel electrochemiluminescence aptasensor based on copper-gold bimetallic nanoparticles and its applications

Huang, Jingcheng, Xiang, Yaodong, Li, Jiansen, Kong, Qianqian, Zhai, Hongguo, Xu, Rui, Yang, Fengzhen, Sun, Xia, Guo, Yemin·2021·Biosensors and Bioelectronics
DOI 10.1016/j.bios.2021.113601
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Abstract

In this work, a novel electrochemiluminescence (ECL) aptasensor was structured for the detection of four organophosphorus pesticides (OPs). Firstly, multi-walled carbon nanotubes (MWCNTs) were used to create a favorable loading interface for the fixation of tris (2, 2'-bipyridyl) ruthenium (II) (Ru (bpy) 3 2+ ). At the same time, copper (core)-gold (shell) bimetallic nanoparticles (Cu@Au NPs) were synthesized in the aqueous phase for the sensor construction. Gold nanoparticles (Au NPs) could promote the electrochemiluminescence intensity of Ru (bpy) 3 2+ with high efficiency by catalyzing the oxidation process of tri-n-propylamine (TPrA). Compared with the Au NPs, Cu@Au NPs increased the solid loading of Au NPs by virtue of the large specific surface area of copper nanoparticles (Cu NPs), which could further improve the sensitivity of aptasensor. When OPs were added, the ECL intensity was significantly reduced, and the concentration of OPs could be detected through the ECL intensity. Under the optimum conditions, the aptasensor had a wider dynamic range and ultra-low detection limit for the detection of four pesticides: profenofos, isocarbophos, phorate, and omethoate, and their detection limits were 3 × 10 -4 ng/mL, 3 × 10 -4 ng/mL, 3 × 10 -3 ng/mL, and 3 × 10 -2 ng/mL respectively (S/N = 3). The aptasensor had the merits of good stability, reproducibility, and specificity, and had a favorable recovery rate in detecting OPs residues in vegetables. This work provided an effec…

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Cited by

Metadata

Authors
Huang, J., Xiang, Y., Li, J., Kong, Q., Zhai, H., Xu, R., Yang, F., Sun, X., & Guo, Y.
Affiliations
Shandong University of Technology (CN)
Corresponding author
  • Sun, Xia
  • Guo, Yemin
ORCID
Venue
Biosensors and Bioelectronics
Publisher
Elsevier BV
Published
2021-12
Volume
194
Pages
113601
ISSN
0956-5663 (ISSN-L)
DOI
10.1016/j.bios.2021.113601
OpenAlex
W3198468325
Cited by
84
References
0
Citations by year
2026: 12 · 2025: 6 · 2024: 19 · 2023: 24 · 2022: 22 · 2021: 1
FWCI
5.18
Type
journal article
Language
en
Open access
closed
Licence
Locations
  • Biosensors and Bioelectronics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
  • Physical Sciences › Chemistry › Analytical Chemistry › Electrochemical sensors and biosensors
  • Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
Keywords
electrochemiluminescence aptasensor, organophosphorus pesticides, Ru(bpy)3 2+, multi-walled carbon nanotubes, pesticide residue detection, food safety, profenofos, isocarbophos, phorate, omethoate
MeSH terms
Copper, Gold, Organophosphorus Compounds, Pesticides, Reproducibility of Results, Biosensing Techniques, Nanotubes, Carbon, Metal Nanoparticles, Electrochemical Techniques

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