A Universal Fast Colorimetric Method for DNA Signal Detection with DNA Strand Displacement and Gold Nanoparticles

Figure 11

TEM picture and UV-Vis absorption spectra of 20 nm gold nanoparticles by the spectra photo meter K5500 with sample diameters 1.0 mm (blue) and 0.2 mm (red) in tube TB with 0.5 M NaCl.