Figure 3.

Nanomaterials (quantum dots and gold nanoparticles) for sensing. (A): (a) AuNPs and DNA-QDs for a self-assembled core–shell fluorescent probe. (b) Salmonella typhimurium was captured and enriched followed by isolation using magnetite microspheres. The attachment of surface-bound antibodies to the target bacteria and its reaction with the probe trailed by fluorescence measurements. Adapted with permission from Ref. [54]. Copyright 2020, Elsevier. (B): Detection of Salmonella using glassy carbon electrode (GCE). Graphene oxide was immobilized on the surface of GCE followed by electrodeposition of gold nanoparticles. Then, AuNPs were linked with ssDNA aptamers to capture the target Salmonella antigen. Adapted with permission from Ref. [70]. Copyright 2014, Elsevier.