Fig. 2
Colorimetric assay with aptamer-modified gold nanoparticles, (a) adsorbed aptamers detach from AuNP to bind their target, AuNPs aggregate due to salt
addition. (b) AuNPs are modified with aptamer 1 or 2, which can bind in a sandwich format to the added analyte and AuNPs build an assembly
168
A. Eilers et al.
Colorimetric assay with aptamer-modified gold nanoparticles, (a) adsorbed aptamers detach from AuNP to bind their target, AuNPs aggregate due to salt
addition. (b) AuNPs are modified with aptamer 1 or 2, which can bind in a sandwich format to the added analyte and AuNPs build an assembly
168
A. Eilers et al.