A novel AuNPs colorimetric sensor for sensitively detecting viable Salmonella typhimurium based on dual aptamers

A sensitive and accurate strategy was presented based on gold nanoparticles (AuNPs) for visual detecting viable Salmonella typhimurium (S. typhimurium). In this paper, dual aptamers were used to capture S. typhimurium and PCR amplification, respectively. The highly stable network structure formed by the hybridization between amplicons and AuNPs-probes protects AuNPs from self-aggregation and color change in the presence of salt. Under optimized...