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A label-free electrochemical aptasensor was developed for selective detection of saxitoxin (STX). It is taking advantage of target-induced conformational change of an STX-specific aptamer when it binds to the toxin. A monolayer of octadecanethiol was deposited on a gold electrode, and then coated with a film of multiwalled carbon nanotubes (MWCNTs) to which the aptamer was covalently conjugated. Methylene...
A new signal amplification strategy based on mesoporous carbon-enriched palladium nanostructure (MSC-PdNS) was designed for enzyme-free electrochemical immunoassay of brevetoxin B (BTB) in marine toxins. The assay was carried out on a BTB-bovine serum albumin-functionalized electrode by using monoclonal mouse anti-BTB-labeling MSC-PdNS as the signal-transduction tag. A competitive-type assay protocol...
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