A simple procedure for the voltammetric detection of antioxidative activity of plant extracts based on the protection from DNA damage at the electrode surface is reported. A disposable electrochemical DNA biosensor fabricated as a carbon-based screen-printed electrode modified by a surface layer of the calf thymus double stranded (ds) DNA was used as a working electrode in combination with a si...

Huang, H. 2017. Quinone-Pyrrole Dyad Based Polymers for Organic Batteries. From Design to Application. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1483. 73 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9832-0. Organic electrode materials are finding increasing use in energy storage devices due to their attractive properties ...

A carbon nanotube/La-doped TiO₂ (La-TiO₂) nanocomposite (CLTN) was prepared by a procedure similar to a complex/adsorption process. Scanning electron microscopy (SEM) images show that the La-TiO₂ distributes on the carbon nanotube walls. The CLTN was mixed with paraffin to form a CLTN paste for the CLTN paste electrode (CLTNPE). The electrochemical characteristics of CLTNPE were compared with t...

Chronoamperometric transients are recorded in different quantities of supporting electrolyte, from full to self-support, for one electron transfer reactions of redox systems carrying diverse charges, and are studied to dissect migrational and diffusional contributions to mass transport under different conditions (applied overpotential, electrode radius, kinetics and charge of electroactive spec...

The unmediated electrochemistry of two large Cu-containing proteins, ascorbate oxidase and laccase, was investigated by direct-current cyclic voltammetry. Rapid heterogeneous electron transfer was achieved in the absence of promoters or mediators by trapping a small amount of protein within a solid, electrochemically inert, tributylmethyl phosphonium chloride membrane coating a gold electrode. ...

Electron transfer is an essential step in many important processes and has been the subject of intensive research, with relevance to areas such as molecular electronics, electrochemistry, biology, catalysis, information storage, and solarenergy conversion. Therefore, understanding interfacial electron transfer between molecules and electrodes, and their dynamics at the molecular level, is impor...

ZnO-nanorods/graphene heterostructure was synthesized by hydrothermal growth of ZnO nanorods on chemically reduced graphene (CRG) film. The hybrid structure was demonstrated as a biosensor, where direct electron transfer between glucose oxidase (GOD) and electrode was observed. The charge transfer was attributed to the ZnO nanorod wiring between the redox center of GOD and electrode, and the Zn...

Fabrication and electrochemical characterization of disposable working electrodes/transducers of electrochemical sensors is described in this work. The aim was to find the best electrochemical properties of screen-printed electrode substrates modified with multiwalled carbon nanotubes (MWCNTs) based active layers. Two types of platinum electrode contacts were investigated and the suitable thick...

Electrochemical and spectroscopic investigations were performed in order to clarify the mechanism of 4nitrobenzene diazonium reduction on glassy carbon in protic medium. The number and nature of the electron transfer processes were found to be strongly correlated to the electrode surface state. On polished electrode two different reduction peaks were observed. Selective electrolyses realized at...

Design and fabrication of electrodes is key in the development of electrochemical sensors with superior electrochemical performances. Herein, an enzymeless electrochemical sensor is developed for detection of hydrogen peroxide based on the use of highly ordered polyoxometalate (POM)-doped polyaniline (PANI) nanopillar films. The electrodeposition technique enables the entrapment of POMs into PA...