Electrochemical Sensing of Hydrogen Peroxide Using Block Copolymer Templated Iron Oxide Nanopatterns.
Salih Z BasCian CumminsDipu BorahMustafa ÖzmenMichael A MorrisPublished in: Analytical chemistry (2017)
A new enzyme-free sensor based on iron oxide (Fe3O4) nanodots fabricated on an indium tin oxide (ITO) substrate via a block copolymer template was developed for highly sensitive and selective detection of hydrogen peroxide (H2O2). The self-assembly-based process described here for Fe3O4 formation is a simple, cost-effective, and reproducible process. The H2O2 response of the fabricated electrodes was linear from 2.5 × 10-3 to 6.5 mM with a sensitivity of 191.6 μA mM-1cm-2 and a detection limit of 1.1 × 10-3 mM. The electrocatalytic activity of Fe3O4 nanodots toward the electroreduction of H2O2 was described by cyclic voltammetric and amperometric techniques. The sensor described here has a strong anti-interference ability to a variety of common biological and inorganic substances.
Keyphrases
- hydrogen peroxide
- iron oxide
- label free
- molecularly imprinted
- reduced graphene oxide
- nitric oxide
- loop mediated isothermal amplification
- gold nanoparticles
- real time pcr
- drug release
- amino acid
- sensitive detection
- mass spectrometry
- fluorescent probe
- oxide nanoparticles
- water soluble
- tandem mass spectrometry
- liquid chromatography