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Sergeyev B. M., Kiryukhin M. V., Bakhov F. N., Sergeyev V. G.
Photochemical Synthesis of Silver
Nanoparticls in the Water Solutions of Polycarboxylic Acids. The Effect of
Polymer Template on the Nanoparticle Size and Shape
Abstract
The analysis of the effect of ionization and
decarboxylation degrees of different molecular mass poly(acrylic) and
poly(methacrylic) acids on the size and shape of nanoparticles produced via
photochemical reduction of silver ions bound in polycomplexes is performed. The
threshold value of the relative content of carboxylate groups of about 0,7 is
found, beyond which macromolecules cooperatively bind silver cations forming
stable complexes and photoreduction leads to the formation of spherical metal
nanoparticles. Below threshold the affinity of investigated polyelectrolytes to
Ag+ ions drops sharply and photoreduction process is accompanied by
aggregation of “primary” particles, their subsequent photoinduced coalescence
and growth of metal nanorods.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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