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High density gold nanoparticles (GNPs) on indium tin oxide (ITO) film coated glass have been prepared by electrochemical deposition from KAu(CN)2 solution. In this study, suitable applied potential ranges and deposition cycles are chosen to achieve high density GNPs on ITO surface. The potential utility of the high density GNP/ITO substrate are investigated. The superoxide dismutase (SOD) was immobilized...
Gold nanoparticles (NPs) of 10-50 nm in diameter were synthesized on nitrogen incorporated diamond-like carbon (DLC:N) thin film electrode by electrodeposition. The deposition process of Au was investigated by cyclic voltammetry and chronoamperometry. The morphology of Au NPs was characterized by scanned electron microscopy. The potentiostatic current-time transients showed a progressive nucleation...
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...
Poly (sodium 4-styrenesulfonate) (PSS) was grafted onto carbon black surface by ambient surface-initiated atom radical transfer polymerization. And the carbon paste electrodes modified by CB-g-PSS and MWNTs were completed. CB-g-PSS and MWNTs had no effect on direct electron transfer based on the carbon paste electrode, but increased the redox speed of Fe [(CN)6]3- / Fe[(CN)6]4- and led to stronger...
We have constructed a piezoelectric sensor matrix with the capability of measuring the flexibility of immunoglobulin. The matrix consisted of 6 independent quartz crystal microbalance (QCM) coated with gold nanoparticles (GNP) of 3.5, 5, 12, 17, and 37 nm, and BSA. The detection was performed simultaneously. Antiserum against GNP bound to QCMs coated with 3.5 nm GNP and maximized for 5 nm GNP-coated...
Poly (sodium 4-styrenesulfonate) (PSS) was grafted onto carbon black surface by ambient surface-initiated atom radical transfer polymerization. And the sensors of screen printed carbon electrode based on CB-g-PSS immobilized with glucose oxidase were completed. The effect of CB-g-PSS on the response of amperometric glucose oxidase electrode for glucose was examined. The experimental results indicate...
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