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A Label-Free Electrochemical Aptasensor for the Rapid Detection of Tetracycline Based on Ordered Mesoporous Carbon-Fe3O4
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
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2018 (engelsk)Inngår i: Australian journal of chemistry (Print), ISSN 0004-9425, E-ISSN 1445-0038, Vol. 71, nr 2-3, s. 170-176Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A novel aptasensor based on a tetracycline (TET) aptamer immobilized by physical adsorption on an ordered mesoporous carbon-Fe3O4 (OMC-Fe3O4)-modified screen-printed electrode surface was successfully fabricated. OMC-Fe3O4 was characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The modification procedure of the aptasensor was characterized by cyclic voltammetry. Interaction between the TET aptamer and target was determined by differential pulse voltammetry. Under optimal conditions, the proposed aptasensor exhibited good electrochemical sensitivity to TET in a concentration range of 5 nM to 10 μM, with a detection limit of 0.8 nM (S/N =3D 3). This aptasensor exhibited satisfactory specificity, reproducibility, and stability.

sted, utgiver, år, opplag, sider
CSIRO Publishing, 2018. Vol. 71, nr 2-3, s. 170-176
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URN: urn:nbn:se:umu:diva-146171DOI: 10.1071/CH17503ISI: 000426369100012OAI: oai:DiVA.org:umu-146171DiVA, id: diva2:1202984
Tilgjengelig fra: 2018-05-02 Laget: 2018-05-02 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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