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Issue 41, 2016
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An impedimeric biosensor based on a composite of graphene nanosheets and polyaniline as a suitable platform for prostate cancer sensing

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Abstract

In this work, a simple and new electrochemical biosensor based on a glassy carbon electrode (GCE) modified with a nanocomposite of polyaniline (PANI) and graphene oxide (GO) nanosheets for DNA detection was designed. The modification process was characterized by scanning electron microscopy (SEM) and electrochemical methods. The immobilization and hybridization processes were followed using electrochemical techniques and the experimental conditions were optimized, too. The electrochemical response for DNA hybridization was measured using the electrochemical impedance spectroscopy (EIS) method. The obtained calibration graph contains a linear range of 1.0 × 10−16 M to 1.0 × 10−8 M and a detection limit of 3.3 × 10−17 M. The designed biosensor (ssDNA/PANI/GO/GCE) revealed high selectivity for the detection of the complementary sequences from non-complementary sequences, so the fabricated biosensor can be used for the detection of prostate cancer (PCa) DNA sequences.

Graphical abstract: An impedimeric biosensor based on a composite of graphene nanosheets and polyaniline as a suitable platform for prostate cancer sensing

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Publication details

The article was received on 01 Jun 2016, accepted on 29 Aug 2016 and first published on 16 Sep 2016


Article type: Paper
DOI: 10.1039/C6AY01524G
Citation: Anal. Methods, 2016,8, 7507-7515
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    An impedimeric biosensor based on a composite of graphene nanosheets and polyaniline as a suitable platform for prostate cancer sensing

    M. D. Tezerjani, A. Benvidi, M. Rezaeinasab, S. Jahanbani, S. M. Moshtaghioun, M. Youssefi and K. Zarrini, Anal. Methods, 2016, 8, 7507
    DOI: 10.1039/C6AY01524G

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