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a similar poly(maleic anhydride) micelle using long alkyl chains to inter-
digitate between the existing capping ligands.
This use of interdigitating polymers was extended to the application of
poly(maleic acid anhydride-
alt
-1-tetradecene), where the long alkyl chain
again intercalated with the surface ligands of the nanoparticle of various
materials, from semiconductors, to metals, alloys and metal oxides
(Figure 6.10).
272
Once the polymer had intercalated with the surface capping
agents, the anhydride groups required hydrolysation to induce water solu-
bility. The polymer chains could again be cross-linked with bis(6-aminohexyl)
amine, and hydrodynamic diameters increased from 10 nm or less to more
than 20 nm upon phase transfer. Similarly, poly(maleic anhydride-
alt
-1-ODE),
a (then) commercially available polymer, was used to phase-transfer iron
d
n
1
y
4
n
g
|
6
.
Figure 6.10
Scheme for polymer coating of nanocrystals. Reprinted with
permission from T. Pellegrino, L. Manna, S. Kudera, T. Liedl, D.
Koktysh, A. L. Rogach, S. Keller, J. Radler, G. Natile and W. J. Parak,
Nano Lett.
, 2004,
4
, 703. Copyright 2004 American Chemical Society.
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