Publication details

Copper Nanoparticle Modified Pencil Graphite Electrode for Electroanalysis of Adenine

Authors

SHARMA Vimal Kumar TRNKOVÁ Libuše

Year of publication 2016
Type Article in Periodical
Magazine / Source Electroanalysis
MU Faculty or unit

Faculty of Science

Citation
Web http://onlinelibrary.wiley.com/doi/10.1002/elan.201600237/full
Doi http://dx.doi.org/10.1002/elan.201600237
Field Physical chemistry and theoretical chemistry
Keywords Copper nanoparticles; pencil graphite electrode; adenine oxidation; linear sweep voltammetry; electrochemical biosensing
Description A pencil graphite electrode (PeGE) modified with copper nanoparticles (CuNPs) was employed for sensitive electrochemical detection of adenine (Ade). The CuNPs were synthesized by the chemical reduction of copper (II) sulphate by borohydride in the presence of polyvinylpyrrolidone (PVP) and immobilized onto the electrode surface by means of physical adsorption. The cyclic voltammetry (CV) results illustrate that the CuNP-modified PeGE provides at least fivefold increase of Ade oxidation peaks compared to the bare PeGE. The detection limit in CV corresponds to value of 200nM. The accumulation of Ade through the complex with Cu (I) allows us to introduce the novel biosensor for the determination not only of adenine but also purines capable to form analogical Cu (I) complexes.
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