Table 5.

Characterization of different iron oxide-gold nanoclusters (nanoroses).

Type of nanoroses	Au/Fe initial mass ratio	UV-VIS maximum extinction (nm)	Au/PEG-SH initial ratio (mole/mole)	Weight gold per nanoparticle, g, Au	Dynamic light scattering size (nm)
Thin knobby	0.25	850	6.3	$3.1\times {10}^{-16}$	$179\pm 15.5$
Thin round	0.50	600	12.6	$6.8\times {10}^{-15}$	$54\pm 2.4$
Thin Knobby (original nanoroses)	0.63	700	Dextran	$2.1\times {10}^{-16}$	$35\pm 1.5$