Electrochemical Investigation of Carbon Nanotube Modified Surfaces Based on Ferricyanide and Guanine Signals for DNA Biosensor Applications
Abstract
This
study was designed to investigate the performance of carbon nanotubes (CNT)
modified carbon paste and carbon printed electrodes (SPE) produced in
laboratory conditions. The effect of carbon nanotube use on signal enrichment
was determined by using cyclic voltammetry (CV), square wave voltammetry (SWV)
or differential pulse voltammetry (DPV) techniques based on potassium
ferricyanide/ ferrocyanide or guanine signal. The application of different
activation procedures to the electrode surface such as chemical (H2SO4,
acetone, N,N-Dimethylformamide or NaOH) or electrochemical (different potential
applications) were presented in this study. It was observed that the activation
procedure applied to the nanotube modified electrode has strong effects on
signal enrichment. From these procedures it was determined that the guanine
signal obtained in activation with NaOH increased about 62-fold. It was also
found that different nanotube species gave different responses to the
activation processes. The optimum conditions of the nanotube-based biosensor
were also presented.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Authors
Publication Date
March 22, 2019
Submission Date
July 12, 2018
Acceptance Date
March 21, 2019
Published in Issue
Year 2019 Volume: 40 Number: 1