Influence of pH on Dendrimer-Protected Nanoparticles
The Journal of Physical Chemistry B2002Vol. 106(6), pp. 1252–1255
Citations Over TimeTop 10% of 2002 papers
Abstract
Highly stable, isolated, and monodisperse Ag nanoparticles, protected by poly(amidoamine) (PAMAM) dendrimers, were prepared via direct chemical reduction. UV−visible absorption, dynamic light scattering, and transmission electron microscopy have been used to study the structure and behavior of the nanocomposites as a function of pH. The data show that pH is a critical determinant of aggregation in PAMAM dendrimers, and that dendrimer aggregation, in turn, strongly influences nanoparticle stability against flocculation. The results allow for a complete understanding of previously reported difficulties in preparing Ag nanoparticles by this method.
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