Gold Nanoparticle Sensor for the Visual Detection of Pork Adulteration in Meatball Formulation
Figure 1
TEM images of colloidal particles before and after salt-induced aggregation. Shown are 180 pM gold colloids in DI water (a), in 3 mM PBS (b), in 3 mM PBS after 3-minute incubation in 3 nM ssDNA probe at 50°C (c), and in 3 mM PBS after the same-time incubation in equimolar 25-bp dsDNA at 25°C (d). All images are shown at a magnification of 100,000 times.
