Flexible Polyester Screen-printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

Colani T. Fakude; Omotayo A. Arotiba; Fabiana Arduini; Nonhlangabezo Mabuba

doi:10.1002/elan.202060070

Flexible Polyester Screen-printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

Colani T. Fakude, Omotayo A. Arotiba, Fabiana Arduini, Nonhlangabezo Mabuba

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

An aptasensor was prepared by immobilising a biotinylated aptamer selected for Cd(II) on an activated carbon nanofiber (CNF) and streptavidin modified a screen-printed electrode. The acid activated CNF was characterised by FTIR, CHNS elemental analysis and electron microscopy. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy (EIS) were used to characterise each step in the aptasensor preparation electrochemically. A detection limit of 0.11 ppb and a linear range of 2–100 ppb were obtained for Cd(II) with tolerance for other interfering species. The aptasensor was applied in real water samples and validated with ICPOES.

Original language	English
Pages (from-to)	2650-2658
Number of pages	9
Journal	Electroanalysis
Volume	32
Issue number	12
DOIs	https://doi.org/10.1002/elan.202060070
Publication status	Published - Dec 2020

Keywords

aptamer
aptasensor
cadmium
carbon nanofibers
square wave voltammetry

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry

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10.1002/elan.202060070

Cite this

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title = "Flexible Polyester Screen-printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)",

abstract = "An aptasensor was prepared by immobilising a biotinylated aptamer selected for Cd(II) on an activated carbon nanofiber (CNF) and streptavidin modified a screen-printed electrode. The acid activated CNF was characterised by FTIR, CHNS elemental analysis and electron microscopy. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy (EIS) were used to characterise each step in the aptasensor preparation electrochemically. A detection limit of 0.11 ppb and a linear range of 2–100 ppb were obtained for Cd(II) with tolerance for other interfering species. The aptasensor was applied in real water samples and validated with ICPOES.",

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author = "Fakude, {Colani T.} and Arotiba, {Omotayo A.} and Fabiana Arduini and Nonhlangabezo Mabuba",

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year = "2020",

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doi = "10.1002/elan.202060070",

language = "English",

volume = "32",

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T1 - Flexible Polyester Screen-printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

AU - Fakude, Colani T.

AU - Arotiba, Omotayo A.

AU - Arduini, Fabiana

AU - Mabuba, Nonhlangabezo

PY - 2020/12

Y1 - 2020/12

N2 - An aptasensor was prepared by immobilising a biotinylated aptamer selected for Cd(II) on an activated carbon nanofiber (CNF) and streptavidin modified a screen-printed electrode. The acid activated CNF was characterised by FTIR, CHNS elemental analysis and electron microscopy. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy (EIS) were used to characterise each step in the aptasensor preparation electrochemically. A detection limit of 0.11 ppb and a linear range of 2–100 ppb were obtained for Cd(II) with tolerance for other interfering species. The aptasensor was applied in real water samples and validated with ICPOES.

AB - An aptasensor was prepared by immobilising a biotinylated aptamer selected for Cd(II) on an activated carbon nanofiber (CNF) and streptavidin modified a screen-printed electrode. The acid activated CNF was characterised by FTIR, CHNS elemental analysis and electron microscopy. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy (EIS) were used to characterise each step in the aptasensor preparation electrochemically. A detection limit of 0.11 ppb and a linear range of 2–100 ppb were obtained for Cd(II) with tolerance for other interfering species. The aptasensor was applied in real water samples and validated with ICPOES.

KW - aptamer

KW - aptasensor

KW - cadmium

KW - carbon nanofibers

KW - square wave voltammetry

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U2 - 10.1002/elan.202060070

DO - 10.1002/elan.202060070

M3 - Article

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SN - 1040-0397

VL - 32

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EP - 2658

JO - Electroanalysis

JF - Electroanalysis

IS - 12

ER -

Flexible Polyester Screen-printed Electrode Modified with Carbon Nanofibers for the Electrochemical Aptasensing of Cadmium (II)

Abstract

Keywords

ASJC Scopus subject areas

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