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Coulomb diamonds were clearly observed on single-electron transistors (SETs) fabricated by bottom-up processes of electroless plating of Au nanogap electrodes and chemisorption of a Au nanoparticle at 80 K. In the drain current-drain voltage characteristics, Coulomb staircases were modulated by the side gate voltage. Tunneling resistances and source/drain/gate capacitances of the SET were evaluated...
A highly sensitive and stable L-Lactate sensor based on the synergic action of multi-wall carbon nanotube (MWCNTs) and ZnO nanoparticles has been developed. The unique sandwich-like layer structure (PDDA/LOD/ZnO/MWCNTs) provides a favorable microenvironment to keep the bioactivity of LOD and prevent enzyme molecule leakage. Therefore, the proposed L-Lactate biosensor exhibited good analytical performances...
This work covers an area of miniaturized electrochemical systems for detection of substances matters in aqueous solutions. Multiwalled carbon nanotubes powder has been used for preparation of screen-printable paste nanocomposition using suitable polymer vehicle. Fabricated electrode has been used for electrochemical analysis of cadmium and lead ions in acetate buffer solution using differential pulse...
Graphene nanosheets (GNs) have been investigated as a counter electrode for dye-sensitized solar cells (DSCs). Mesoporous TiO2 films are prepared from the commercial TiO2 nano-powders by screen-printing technique on fluorine-doped tin oxide (FTO) slides. GNs are applied to substitute for platinum as counter-electrode materials. GN films are screen printed on FTO glass using a paste based on GNs dispersed...
The 3-D carbon micro-electrode array, have been designed and simulated for dielectrophoretic manipulation of nanoparticles in fluids. The effects of electrode shape, applied voltage, electrode spacing and geometric size of the electrodes on the gradient in the electric field intensity is considered. Results show that the magnitude in the gradient in the electric field intensity produced by square...
This paper reports a rapid, simple and direct method for the synthesis of gold nanoparticles (AuNPs) in polypyrrole (PPy) film, which provides a biocompatible matrix for the strong adsorption of antibodies. The electrochemical synthesis of AuNPs/PPy composite on gold or carbon electrode occurs within 20 minutes, and does not involve addition of any nanoparticles or reducing agent. This method is compatible...
In this paper, we present the grow of mm-long, well-aligned individual single wall carbon nanotubes (SWNTs) on flat substrates suitable for device fabrication. We also demonstrate the feasibility of using such long nanotubes as nanoscale antennas. To fabricate such antenna structure, well separated and well aligned individual nanotubes were grown by adopting a newly developed method to pattern catalyst...
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