DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

Figure 13

Absorption spectra (a) of DNA before (1) and after the reduction of silver (in 1 min (2) and 75 min (4)), DNA in solution with Ag-NPs-2 (3), calculated peak obtained by subtraction of spectrum 2 from spectrum 4 (5), and Ag-NPs-2 without DNA (6). The luminescence spectra (b) of silver nanoclusters on DNA (the excitation wavelengths are shown near the lines).

(a)

(b)