Indicator-free electrochemical biosensor for microRNA detection based on carbon nanofibers modified screen printed electrodes

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dc.contributor.authorErdem A.
dc.contributor.authorEksin E.
dc.contributor.authorCongur G.
dc.date.accessioned2019-10-26T21:22:00Z
dc.date.available2019-10-26T21:22:00Z
dc.date.issued2015
dc.departmentEge Üniversitesien_US
dc.description.abstractCarbon nanofibers (CNFs) are fiber-structured nano-sized carbon materials, which have excellent mechanical, thermal and electrical properties. CNFs possess a wide range of application especially in biorecognition area. In this study, we developed an indicator-free voltammetric biosensor for detection of miRNA-34a target RNA by using carbon nanofiber enriched disposable screen printed electrodes (CNF-SPEs). The sensitive and selective recognition of miRNAs has been an attractive topic due to they have been defined as small RNAs and play major roles in regulating the translation and degradation of messenger RNAs. The characterization of CNF-SPEs in contrast to unmodified ones was firstly performed by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) techniques. The amino linked DNA probe, that was the complementary sequence of miRNA-34a, was immobilized onto the surface of CNF-SPEs. After measuring the guanine oxidation signal measured by differential pulse voltammetry (DPV), the detection of sequence-selective hybridization was then investigated between probe and miRNA-34a RNA target, or other miRNA sequences; miRNA-15a, or miRNA-660, which were chosen as noncomplementary sequences (NC). The detection limit was corresponded to 10.98 µg/mL (54 pmol in 35 µL sample) in the linear concentration range of target miRNA-34a from 25 to 100 µg/mL by using CNF-SPEs. The features of this present study was comprehensively discussed by means of the unique characteristics of single-use CNF-SPEs and importance of miRNA monitoring. © 2015 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.jelechem.2015.07.031
dc.identifier.endpage173en_US
dc.identifier.issn1572-6657
dc.identifier.issn1572-6657en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage167en_US
dc.identifier.urihttps://doi.org/10.1016/j.jelechem.2015.07.031
dc.identifier.urihttps://hdl.handle.net/11454/16929
dc.identifier.volume755en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofJournal of Electroanalytical Chemistryen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCarbon nanofibersen_US
dc.subjectdifferential pulse voltammetryen_US
dc.subjectelectrochemical impedance spectroscopyen_US
dc.subjectmiRNAen_US
dc.subjectscreen printed electrodeen_US
dc.titleIndicator-free electrochemical biosensor for microRNA detection based on carbon nanofibers modified screen printed electrodesen_US
dc.typeArticleen_US

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