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Development of an electrochemical sensitive aptasensor based on a zeolite imidazolate framework-8 and gold nanoparticles for the determination of Staphylococcus aureus bacteria

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Abstract

Staphylococcus aureus (S. aureus) is one of the most important pathogens that cause illness and food poisoning. In this research, using a glassy carbon electrode (GCE) modified with zeolite imidazolate framework-8 (ZIF 8) and gold nanoparticles (AuNPs), a sensitive electrochemical aptasensor has been made for the detection of the S. aureus bacteria. The morphology of the prepared AuNPs-ZIF 8 nanocomposite has been carefully characterized by means of transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDS). In the manufacturing process, the S. aureus aptamer is immobilized on the AuNPs-ZIF 8 surface. Electrochemical impedance spectroscopy (EIS) method has been used for quantitative determination of S. aureus bacteria. The changes in the charge transfer resistance (Rct) of the aptamer due to the change in the concentration of bacteria are considered as the analytical signals. The proposed aptasensor has linear response in the concentration range of 1.5 × 101 to 1.5 × 107 CFU mL−1 of S. aureus bacteria. The detection limit of the method is 3.4 CFU mL−1. Using the developed aptasensor, it is possible to determine S. aureus bacteria in water and milk samples.

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Authors and Affiliations

  1. Department of Chemistry, Yazd University, 89195–741, Yazd, Iran

    Hafezeh Morsalpour, Hamid R. Zare, Zahra Shekari & Maryam Mirbagheri

  2. Department of Biology, Yazd University, 89195–741, Yazd, Iran

    Hafezeh Morsalpour, Hamid R. Zare, Zahra Shekari & Maryam Mirbagheri

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  1. Hafezeh Morsalpour
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  2. Hamid R. Zare
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  3. Zahra Shekari
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  4. Maryam Mirbagheri
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Correspondence to Hamid R. Zare.

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Morsalpour, H., Zare, H.R., Shekari, Z. et al. Development of an electrochemical sensitive aptasensor based on a zeolite imidazolate framework-8 and gold nanoparticles for the determination of Staphylococcus aureus bacteria. Anal Bioanal Chem 416, 1229–1238 (2024). https://doi.org/10.1007/s00216-023-05115-6

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  • DOI: https://doi.org/10.1007/s00216-023-05115-6

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