Carbon-fiber microelectrodes have been used for in vivo measurements of neurotransmitters. Our lab is exploring a few different approaches to increasing the sensitivity of these electrodes. The first approach is to modify the surface of electrodes with carbon nanotubes. Carbon nanotube treatments of electrodes have been used to increase sensitivity, promote electron transfer, and reduce fouling...

Redox cycling of enzymatically amplified electroactive species has been widely employed for high signal amplification in electrochemical biosensors. However, gold (Au) electrodes are not generally suitable for redox cycling using a reducing (or oxidizing) agent because of the high background current caused by the redox reaction of the agent at highly electrocatalytic Au electrodes. Here we repo...

The advent of stripping voltammetry has improved the performance of analytical voltammetry to a considerable extent.1 The enhanced sensitivity and lower detection limits can be achieved in this technique by enrichment of the analyte prior to voltammetric determination. The common enrichment processes include reduction of metal ions through formation of metal films or amalgams, reductive or oxid...

This study presents the electrochemical degradation of methylene blue (MB) wastewater in a synthetic solution using three-dimensional particle electrodes. The novel particle electrodes were fabricated in this work using the lithium modified rectorite (Li-REC). The adsorption property of the fabricated particle electrodes was studied in a series of experiments. The optimum electrochemical operat...

The detection of dopamine in a highly sensitive and selective manner is crucial for the early diagnosis of a number of neurological diseases/disorders. Here, a report on a new platform for the electrochemical detection of dopamine with a considerable accuracy that comprises a 3D porous graphene oxide (pGO)/gold nanoparticle (GNP)/pGO composite-modified indium tin oxide (ITO) is presented. The p...

Synthesis of nickel oxide nanoparticles (NiO NPs) was carried out by Marrubium astranicum leaf extract. The average of particle sizes for NiO NPs was 40 nm. NiO NPs modified carbon paste electrodes in the absence (CPE/NiO NPs) and the presence of sodium dodecyl sulfate (CPE/NiO NPs/SDS) were examined for the electrocatalytic oxidation of methanol in alkaline solutions. The cyclic volta...