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Ozkan-Ariksoysal D, Kayran YU, Yilmaz FF, Ciucu AA, David IG, David V, Hosgor-Limoncu M, Ozsoz M. DNA-wrapped multi-walled carbon nanotube modified electrochemical biosensor for the detection of Escherichia coli from real samples. Talanta 2017; 166:27-35. [PMID: 28213234 DOI: 10.1016/j.talanta.2017.01.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 12/30/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022]
Abstract
This paper introduces DNA-wrapped multi-walled carbon nanotube (MWCNT)-modified genosensor for the detection of Escherichia coli (E. coli) from polymerase chain reaction (PCR)-amplified real samples while Staphylococcus aureus (S. aureus) was used to investigate the selectivity of the biosensor. The capture probe specifically recognizing E. coli DNA and it was firstly interacted with MWCNTs for wrapping of single-stranded DNA (ssDNA) onto the nanomaterial. DNA-wrapped MWCNTs were then immobilised on the surface of disposable pencil graphite electrode (PGE) for the detection of DNA hybridization. Electrochemical behaviors of the modified PGEs were investigated using Raman spectroscopy and differential pulse voltammetry (DPV). The sequence selective DNA hybridization was determined and evaluated by changes in the intrinsic guanine oxidation signal at about 1.0V by DPV. Numerous factors affecting the hybridization were optimized such as target concentration, hybridization time, etc. The designed DNA sensor can well detect E. coli DNA in 20min detection time with 0.5pmole of detection limit in 30µL of sample volume.
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Affiliation(s)
- Dilsat Ozkan-Ariksoysal
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey.
| | - Yasin Ugur Kayran
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
| | - Fethiye Ferda Yilmaz
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
| | - Anton Alexandru Ciucu
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Avenue, District 5, 050663 Bucharest, Romania
| | - Iulia Gabriela David
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Avenue, District 5, 050663 Bucharest, Romania
| | - Vasile David
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Avenue, District 5, 050663 Bucharest, Romania
| | - Mine Hosgor-Limoncu
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
| | - Mehmet Ozsoz
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
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Nur Topkaya S, Ozkan-Ariksoysal D. Prostate Cancer Biomarker Detection with Carbon Nanotubes Modified Screen Printed Electrodes. ELECTROANAL 2015. [DOI: 10.1002/elan.201501003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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