PHYS01200704032 Debes Ray - Homi Bhabha National Institute

Intensity (a.u.)
Chapter 6: High-Yield Synthesis of Gold Nanoparticles
by their formation mechanism. The high concentration of gold salt in presence of Na 3 Ct
favours the mechanism which results in high yield and increase in the size of the particle.
2.0x10 4
1.5x10 4
1 wt% HAuCl4 + 1 wt% Na3Ct
0.5 wt% HAuCl4 + 0.5 wt% Na3Ct
0.2 wt% HAuCl4 + 0.2 wt% Na3Ct
0.05 wt% HAuCl4 + 0.05 wt% Na3Ct
1.0x10 4
5.0x10 3
0.0
0.01 0.05 0.2
Q (Å -1 )
Figure 6.14. SAXS data of 1 wt% P85 with varying (HAuCl 4 .3H 2 O + Na 3 Ct) concentration.
The solid curves are theoretical fits to the experimental data.
Table 6.3. Size parameters of gold nanoparticles as obtained by SAXS in 1 wt% P85 with
varying (HAuCl 4 .3H 2 O + Na 3 Ct) concentration.
Mean Size Polydispersity
Gold Nanoparticle System
(nm)
σ
1% P85 + 0.05% HAuCl 4 .3H 2 O + 0.05% Na 3 Ct 12.5 0.52
1% P85 + 0.2% HAuCl 4 .3H 2 O + 0.2% Na 3 Ct 14.2 0.47
1% P85 + 0.5% HAuCl 4 .3H 2 O + 0.5% Na 3 Ct 18.2 0.41
1% P85 + 1% HAuCl 4 .3H 2 O + 1% Na 3 Ct 22.6 0.35
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