Figure 2.

Schematic illustration of DNA bioassay using AuNPs as labels and their SWSV determination at glassy carbon working electrode. Biotinylated DNA probe immobilized on a streptavidin-coated microwell, which was hybridized with biotinylated target while streptavidin-conjugated AuNPs bound on target DNA, followed by dissolution in acid solution and detection by SWSV method. Reproduced from [48], with permission from Elsevier, 2019.