Self-powering amperometric sensor and biosensor
Wong, Lai Peng
Date of Issue2012
School of Physical and Mathematical Sciences
A unique Prussian blue nanotubes sensor using a two-compartment cell derives the current signal from the chemical energy of the hydrogen peroxide analyte, without input of electrical potentials, is described. The Prussian blue reduces hydrogen peroxide and is itself reduced by electron flow from the counter reaction at the auxiliary electrode. The concentrations of the Prussian blue (PB) and Everitt’s salt (ES) forms of the Prussian blue are maintained at steady-state values, by the hydrogen peroxide reduction and the galvanic cell reaction. This strategy gives low detection limit of 0.1 μM H2O2 with linear range up to 80 μM and is further demonstrated in a model glucose biosensor. The simple design to reduce energy usage opens up the study of amperometricsensor development by selecting anodic and cathodic reactions with suitable thermodynamic potentials with consideration of reactions at the sensing and auxiliary electrodes modified with appropriate mediators or enzymes.
DRNTU::Engineering::Chemical engineering::Biochemical engineering
Journal of electroanalytical chemistry
© 2012 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Electroanalytical Chemistry, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.jelechem.2012.02.017].