Impedimetric aptasensors using nanomaterials

Cristina Ocaña, Manel del Valle

    Research output: Chapter in BookChapterResearchpeer-review

    3 Citations (Scopus)

    Abstract

    © 2018 Elsevier Inc. All rights reserved. This chapter describes aptamer biosensors that employ electrochemical impedance signal as transduction principle. With this idea, detection of substances other than nucleic acids through specific conformer folding region interacting with a complementary substance is the starting point to develop these affinity sensors. Substances detected can be ions, small organic molecules, proteins, even microorganisms, or cells. Electrochemical impedance spectroscopy permits, then, a labeless detection, by simple use of a redox probe. As current topic, it will focus on the use of nanocomponents to improve sensor performance, mainly carbon nanotubes integrated in the sensor platform, graphene or nanoparticles, for signal amplification. Different formats and variants available for analytical applications will be reviewed.
    Original languageEnglish
    Title of host publicationNanotechnology and Biosensors
    Pages233-267
    Number of pages34
    DOIs
    Publication statusPublished - 1 Jan 2018

    Keywords

    • Aptasensors
    • Biosensors
    • Carbon nanotubes
    • Electrochemical impedance spectroscopy
    • Gold nanoparticles
    • Graphene
    • Immobilization of biomolecules
    • Impedimetric biosensing
    • Nanomaterials
    • Nanotechnology
    • Signal amplification

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