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Gold nanoparticles stabilized with ionic liquid 1-dodecyl-3-methylimidazolium bromide ([C12mim]Br) as protecting agent was successfully anchored to acid treated multiwall carbon nanotubes (MWCNTs) by simple electrostatic interaction. A thin film of hybrid nanocomposite (MWCNTs-Au) was then successfully formed on glassy carbon electrode with the aid of ionic liquid N-octyl-pyridinium hexafluorophosphate...
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...
Silver-enhanced labeling is a technique used in immunochromatographic assays for improving the sensitivity of pathogen detection. In this paper, we employ the silver enhancement approach for constructing a biomolecular transistor that uses a high-density interdigitated electrode to detect rabbit IgG. We show that the response of the biomolecular transistor comprises of: (a) a sub-threshold region...
Novel electrochemiluminescence (ECL) nanoprobe was constructed, and the high sensitivity afforded by the current ECL assay based on ECL nanoprobe without the PCR amplification of telomerase reaction products.
Copper (II) determination with a three-dimensional monolayer modified electrode prepared by assembling L-cysteine on gold nanoparticles (L-cys/GNP/GCE) was studied in this paper. With the presence of gold nanoparticles, three-dimensional L-cysteine monolayer-modified electrode showed better voltammetric response for copper (II) than traditional two-dimensional L-cysteine assembled on planar electrode...
Silver-enhanced labeling method that is employed in immunochromatographic assay provides an effective way of improving the sensitivity of detecting pathogens. In this paper, we apply the silver enhancement approach for providing signal amplification in conductimetric biochips which employ gold nanoparticles to bridge on a high-density microelectrode array for detecting gold nanoparticles. One of the...
In recent years, quartz crystal microbalance (QCM) plays an important role in many biological detections, and the enhancement of a single strain DNA probe linked to the sensor surface is of crucial importance in DNA molecule recognition. By means of nanogold modification and mass amplification, a QCM biosensor for Escherichia coli O157:H7 DNA detection was explored and developed in this work. As a...
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