Molecular imprinting sensors based on laser-induced graphene for tigecycline sensing

A highly sensitive and selective molecular imprinting sensor based on laser-induced graphene (LIG) and gold nanoparticles (AuNPs) was fabricated for the sensing of tigecycline in food samples. The LIG electrodes were fabricated using a CO2 laser, and the optimal parameters of 8.6 W power and 10 cm/s...

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Bibliographic Details
Published in:International journal of electrochemical science 2024-09, Vol.19 (9), p.100710, Article 100710
Main Authors: Zheng, Lili, Cao, Yangyuan, Chen, Shaohua
Format: Article
Language:English
Subjects:
Antibiotic residues
Electrochemical sensor
Electropolymerization
Food safety
Nanomaterials
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Summary:A highly sensitive and selective molecular imprinting sensor based on laser-induced graphene (LIG) and gold nanoparticles (AuNPs) was fabricated for the sensing of tigecycline in food samples. The LIG electrodes were fabricated using a CO2 laser, and the optimal parameters of 8.6 W power and 10 cm/s scanning speed yielded a low sheet resistance of 18.2 ± 0.8 Ω/sq. The MIP-AuNP-LIG sensor was prepared by electropolymerization of o-phenylenediamine in the presence of tigecycline template. The sensor exhibited a wide linear range (0.01–800 nM) and a low detection limit (0.003 nM) in buffer solution. In milk and meat samples, the sensor showed good sensitivity with LODs of 0.15 nM and 0.21 nM, respectively. The sensor demonstrated excellent selectivity, reproducibility (RSD = 3.6 %), stability (90 % response after 1 month), and reusability (6 cycles, RSD = 4.2 %). The MIP-AuNP-LIG sensor offers a promising tool for monitoring tigecycline residues in complex food matrices, with advantages over other methods in terms of facile fabrication, robustness, and practicality.
ISSN:1452-3981
1452-3981
DOI:10.1016/j.ijoes.2024.100710