PHYS01200704032 Debes Ray - Homi Bhabha National Institute

Integrated Absorbance / Yield
Absorbance
Chapter 5: Correlating Block Copolymer Self-Assembly to the Gold Nanoparticle Synthesis
thus follows the order P85 > P105 > F88 decreasing with the increase in molecular weight of
block copolymer (Table 5.1).
0.8
0.6
SPR Peak
1 wt% P105 + 0.006 wt% HAuCl4.3H2O
1 wt% P85 + 0.008 wt% HAuCl4.3H2O
1 wt% F88 + 0.004 wt% HAuCl4.3H2O
0.4
0.2
450 500 550 600 650 700
Wavelength (nm)
Figure 5.4. Comparison of SPR peaks for 1 wt% block copolymers (F88, P85 and P105) with
gold salt concentration corresponding to their maximum yields.
100
80
60
40
20
1 wt% P105 + 0.006 wt% HAuCl4.3H2O
1 wt% P85 + 0.008 wt% HAuCl4.3H2O
1 wt% F88 + 0.004 wt% HAuCl4.3H2O
0
0 30 60 90 120 150 180
Time (min.)
Figure 5.5. Time-dependent variation of yield of gold nanoparticles for 1 wt% block
copolymers (F88, P85 and P105) at their corresponding gold salt concentrations of maximum
yields.
119