Synthesis of One Dimensional Gold Nanostructures

Figure 2

(a) Vis-NIR spectra of colloidal Au nanorods aged for various times. Spectra from bottom to top correspond to samples aged for 1–8 hour and 1 day. (b) Vis-NIR spectra of 4 identical growth solutions with increasing HNO₃ (curve-1: 0.1 mL, curve-2: 0.2 mL, curve-3: 0.3 mL, and curve-4: 0.4 mL). Insets of (a) and (b) are the calculated spectra using FDTD solution for Au nanorods with fivefold twin and octahedron cross section (water as medium). TEM images of Au nanorods prepared with HNO₃ (0.1 mL) (c) and HCl (0.2 mL) (d) in a binary surfactants of CTAB and BDAC.

(a)

(b)

(c)

(d)