1 Ocak 2017 Dergi makalesi Açık Erişim

Karazehir, T.; Gokce, Z. Guler; Ates, M.; Sarac, A. S.

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Karazehir, T.</dc:creator>
  <dc:creator>Gokce, Z. Guler</dc:creator>
  <dc:creator>Ates, M.</dc:creator>
  <dc:creator>Sarac, A. S.</dc:creator>
  <dc:date>2017-01-01</dc:date>
  <dc:description>The present study describes the fabrication of Indium Tin Oxide /gold nanoparticles/nickel oxide/poly(PyrroleN-propionic acid) (ITO/GNPs/NiO/poly(PPA)) multilayered film, and its modification with Tyrosinase (Ty). The ITO/GNPs/ NiO/poly(PPA) electrode was fabricated by sequential electrochemical assembly onto ITO substrate which electrochemical deposition provides a facile, inexpensive technique for synthesis of multilayered film within the adherent morphology with controllable film thickness. Cyclic voltammetry (CV), Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), scanning electron microcopy (SEM), and atomic force microcopy (AFM) were used to characterize the film assembly processes. The properties of a semiconductor/electrolyte interface were investigated based on the Mott-Schottky (M-S) approach for the modified electrodes, with the flat band potential (E-FB) according to the potential intercept and the carrier density (N-D) according to the linear slopes. The N-D and EFB of ITO/GNPs/NiO/poly(PPA) were obtained as 2.48 . 1021 cm(-3) and 0.26 V, respectively. Tyrosinase was immobilized using carbodiimide coupling reaction. The bioelectrode was characterized by FTIR-ATR, SEM, AFM, electrochemical impedance spectroscopy (EIS). A Randles equivalent circuit was introduced for modeling the performance of impedimetric biosensing for the detection of the dopamine (DP) and the interface of bioelectrode/electrolyte. The EIS of the ITO/GNPs/NiO/poly(PPA)-Ty exhibited significant changes in the charge transfer resistance (R-CT) value toward the detection of dopamine over a linear range of 80 mu M to 0.2 mM with a limit of detection (LOD) of 5.46 mu M.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/49363</dc:identifier>
  <dc:identifier>oai:zenodo.org:49363</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>EXPRESS POLYMER LETTERS 11(6) 449-466</dc:source>
  <dc:title>Gold nanoparticle/nickel oxide/poly(pyrrole-N-propionic acid) hybrid multilayer film: Electrochemical study and its application in biosensing</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>