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Preparation of silver spheres by aggregation of nanosize subunits

Published online by Cambridge University Press:  31 January 2011

Ionel Halaciuga  and
Dan V. Goia
Ionel Halaciuga
Affiliation:
Clarkson University, Potsdam, New York 13699
Dan V. Goia*
Affiliation:
Clarkson University, Potsdam, New York 13699
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Dispersed uniform spherical silver particles were prepared in the absence of a protective colloid by rapidly mixing concentrated isoascorbic acid and silver-polyamine complex solutions. By varying the nature of the amine, temperature, concentration of reactants, silver/amine molar ratio, and the nature of the silver salt, it was possible to tailor the size of the resulting metallic particles in a wide range (80 nm to 1.3 μm). The silver spheres were formed by aggregation of nanosize subunits, the presence of which was detected by both electron microscopy and x-ray diffraction. Due to its simplicity, high metal concentration, and the absence of polymeric dispersants, the described method represents an advantageous route to manufacture cost-effectively dispersed uniform silver particles for electronic applications.

Keywords

AgColloidDispersant
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 6 , June 2008 , pp. 1776 - 1784
Copyright
Copyright © Materials Research Society 2008

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