Preparation and the mechanisms of formation of silver particles of different morphologies in homogeneous solutions.
Uniform, well-dispersed silver particles of various morphologies have been prepared by reducing highly acidic silver nitrate solutions with ascorbic acid in the presence of a sodium naphthalene sulfonate-formaldehyde copolymer as dispersing agent. By varying the temperature of the reaction, the free acid content, the addition rate of the reductant, and the aging time, both isometric and anisotropic silver particles could be obtained. It was found that the latter were formed by aggregation of nanosize subunits, which were identified by electron microscopy and X-ray diffractometry.
Suber
Lorenza
L
Center for Advanced Materials Processing, Clarkson University, Potsdam, NY 13699-5814, USA.
Sondi
Ivan
I
Matijević
Egon
E
Goia
Dan V
DV