Research

dsDNA modified carbon nanofiber-solidified paste electrodes: probing Ni(II)-dsDNA interactions


Reference:

Ferancova, A., Rassaei, L., Marken, F., Labuda, J. and Sillanpaa, M., 2010. dsDNA modified carbon nanofiber-solidified paste electrodes: probing Ni(II)-dsDNA interactions. Microchimica Acta, 170 (1-2), pp. 155-164.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)

Official URL:

http://dx.doi.org/10.1007/s00604-010-0388-z

Abstract

In order to develop a renewable electrode surface, carbon nanofibers (CNF) were embedded into solidified paste electrodes using a composite of paraffin wax and paraffin oil. A range of different compositions was surveyed and the optimal composition of the paste for electroanalysis was found to be 43% of CNF, 41% of paraffin wax, and 16% of paraffin oil. The electrochemical properties of the novel composite electrode were investigated using cyclic voltammetry and electrochemical impedance spectroscopy and compared to those of similar graphite-solidified paste electrodes. The carbon nanofibers enhance the activity of the surface of the electrode and provide a good substrate for the adsorption and voltammetric detection of dsDNA. Responses of dsDNA bases and Ni2+ ions accumulated from ammonium buffer pH 8.5 (with a Langmuirian binding constant of 10(5) mol(-1) L) were investigated and a limit of detection of 7 nmol L-1 (at 3 sigma) was obtained using "nucleation stripping voltammetry". Interferences by other metal cations are examined and discussed.

Details

Item Type Articles
CreatorsFerancova, A., Rassaei, L., Marken, F., Labuda, J. and Sillanpaa, M.
DOI10.1007/s00604-010-0388-z
Uncontrolled Keywordssolidified paste electrode, dna biosensor, nucleation stripping voltammetry, carbon nanofibers, nickel-dna interaction
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code20238

Export

Actions (login required)

View Item