Document Detail


Growth of Ag-nanoparticles using aspartic acid in aqueous solutions.
MedLine Citation:
PMID:  21074776     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Spectrophotometric, kinetic, and transmission electron microscopic (TEM) data for the formation of Ag-nanoparticles using aspartic acid (Asp) as reductant are reported for the first time. In the formation of transparent silver sols, an alkaline medium is required. The silver nanoparticles are spherical, uniform particle size, and strongly depend on the [Asp]. The apparent rate constant decreases with [Asp] (from 4.0 to 24.0×10(-4)moldm(-3), the rate constants decreased from 2.6×10(-4) to 0.3×10(-4)s(-1)). For a certain reaction time, i.e., 30min, the absorbance of the silver sol first increased until it reached a maximum, and then decreased with [Asp]. Kinetic and TEM results indicate that the size of the Ag-nanoparticles depends on the [Asp]. It is proposed that the oxidation of Asp occurs by the adsorbed Ag(+) ions on the surface of Ag(2)O particles.
Authors:
Abu Rafey; K B L Shrivastavaa; Sayed Aftab Iqbal; Zaheer Khan
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Publication Detail:
Type:  Journal Article     Date:  2010-10-26
Journal Detail:
Title:  Journal of colloid and interface science     Volume:  354     ISSN:  1095-7103     ISO Abbreviation:  J Colloid Interface Sci     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2010-12-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043125     Medline TA:  J Colloid Interface Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  190-5     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Affiliation:
Agnos College of Technology, Bhopal, India.
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