Journal
MICROCHEMICAL JOURNAL
Volume 157, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2020.104959
Keywords
Electrochemiluminescence aptasensor; Poly(indole-6-carboxylic acid)/flower-gold; Graphene quantum dots; Gold nanorods; Aflatoxin B1
Categories
Funding
- National Natural Science Foundation of China [51973102]
- Natural Science Foundation of Shandong [ZR2019MB067]
- Talent Fund of QUST
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A simple electrochemiluminescence (ECL) aptasensor is designed for the ultrasensitive determination of aflatoxin B1 (AFB1) based on poly(indole-6-carboxylic acid)/flower-gold (PICA/F-Au) nanocomposite, graphene quantum dots (GQDs) and gold nanorods (AuNRs). The PICA/F-Au nanocomposite with a core-shell structure shows a satisfactory electrical conductivity. In addition, GQDs is employed as a superior luminescent material due to the high ECL activity. AuNRs, possessing the good conductivity, is utilized for immobilizing AFB1 aptamer chains to improve sensitivity. The easy-to-design sensing platform shows good ECL performance and response to AFB1. Under the optimal conditions, this ECL aptasensor exhibits a wide dynamic linear range from 0.01 to 100 ng mL(-1) with a low detection limit of 0.00375 ng mL(-1). Simultaneously, this sensor possesses satisfactory stability, selectivity and reproducibility, and it also has satisfactory accuracy and reliability in real sample analysis. All these advantages provide a promising prospective for food safety detection.
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