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Keyword Author: gold nanoparticles

Gold Nanospacers Greatly Enhance the Capacitance of Electrochemically Reduced Graphene

Graphene has great potential in electrochemical storage applications for supercapacitors owing to its high conductivity, large surface area, and the economical feasibility in producing it. The main issue that faces graphene nanomaterials in this application is that they tend to restack, thus decreasing the accessible surface area and leading to low capacitance. Gold nanoparticles of …

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Nanogold Spacing of Stacked Graphene Nanofibers for Supercapacitors

Graphene exhibits great potential for energy storage devices in electrochemical supercapacitors as it is a lightweight, inexpensive material. However, as graphene nanomaterials are prone to stacking and therefore blocking electroactive sites, its real capacity is low. Recently, there has been a significant interest in quasi 1D structures of carbon nanofibers with radially oriented graphene sheets, …

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Electrochemical genosensors for biomedical applications based on gold nanoparticles

Two cold nanoparticles-based genomagnetic sensors designs for detection of DNA hybridization are described. Both assays are based on a magnetically induced direct electrochemical detection of gold tags on magnetic graphite-epoxy composite electrodes. The first design is a two strands assay format that consists of the hybridization between a capture DNA strand which is linked with …

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Direct voltammetric determination of gold nanoparticles using graphite-epoxy composite electrode

A new voltammetric method for a direct determination of gold nanoparticles, based on adsorption and electrochemical detection of colloidal gold, is described. In this protocol, the absorption of gold nanoparticles onto the rough surface of graphite-epoxy composite electrode is followed by their electrochemical oxidation in 0.1 M HCl medium at a potential of +1.25 V. …

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