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PHYS01200704032 Debes Ray - Homi Bhabha National Institute

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FWHM (nm)<br />

Chapter 5: Correlating Block Copolymer Self-Assembly to the Gold Nanoparticle Synthesis<br />

(a)<br />

Abs max<br />

(b)<br />

max<br />

(nm)<br />

(c)<br />

0.8<br />

0.7<br />

0.6<br />

0.5<br />

0.4<br />

0.3<br />

0.2<br />

552<br />

548<br />

544<br />

540<br />

536<br />

532<br />

528<br />

180<br />

160<br />

P105<br />

P85<br />

F88<br />

140<br />

120<br />

100<br />

80<br />

30 40 50 60 70 80<br />

Temperature ( o C)<br />

Figure 5.9. (a) Absorbance (Abs max ), (b) maximum wavelength ( max ) and (c) full width at<br />

half-maximum (FWHM) of SPR peak of gold nanoparticles containing 1 wt% block<br />

copolymers as a function of temperature.<br />

systems are plotted in Figure 5.9 In the case of F88 block copolymer there is change in the<br />

SPR peak height and position, which suggests to the increase in the yield and size of the<br />

nanoparticles, respectively with increase in the temperature. These results can be explained<br />

124

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