•  
  •  
 

Turkish Journal of Chemistry

Author ORCID Identifier

SEZİN YÜKSEL: 0009-0009-5716-8238

FETHİYE FERDA YILMAZ: 0000-0003-1102-7826

HÜSEYİN TAŞLI: 0000-0003-0216-1740

PINAR KARA: 0000-0001-5029-9256

DOI

10.55730/1300-0527.3693

Abstract

A novel electrochemical nanogenosensor devoted to clinical analysis is reported for label-free detection of pathogenic microorganisms in the present work. The designed biosensor is composed of graphene oxide-modified disposable pencil graphite electrodes as a sensing platform. Escherichia coli is used as a model case. A 5ʹ-aminohexyl-linked 22-base sequence probe representing the E. coli amplicon is immobilized onto sensor surfaces via carbodiimide chemistry. Hybridization is performed with denatured PCR amplicons of the bacteria. Detection is realized by transduction with the electrochemical impedance spectrometry technique. The selectivity of the designed genosensor is measured using Mycobacterium tuberculosis and Klebsiella pneumoniae sequences. Outstanding sensitivity is achieved with this genosensor array platform with a detection limit of 102 nM. This platform offers promise for rapid, simple, and cost-effective detection of various pathogenic microorganisms.

Keywords

Nanogenosensor, graphene oxide, electrochemical impedance spectrometry, pathogenic microorganisms

First Page

733

Last Page

747

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Download

Share

COinS