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This paper developed a colorimetric method for the determination of oxytetracycline by using cysteamine-stabilized gold nanoparticles (cysteamine-AuNPs) as the color indicator and oxytetracycline-binding aptamers (OBA) as the recognition element. It was proposed by means of the anti-aggregation of cysteamine-stabilized AuNPs induced by the specific recognition of OBA with oxytetracycline. The method...
An aptamer-based colorimetric method for the detection of 17β-estradiol was established by employing AuNPs as the colorimetric probe. This assay was based on the principle that the salt-induced aggregation of AuNPs could be controlled by the adsorption of aptamers on the surface of AuNPs, which was modulated by the specific recognition of aptamers with targets. The method was successfully applied...
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