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Advances in Materials Science and Engineering
Volume 2015, Article ID 682749, 9 pages
Review Article

A Review on the Green Synthesis of Silver Nanoparticles and Their Morphologies Studied via TEM

1Department of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia
2Tartu College, Tallinn University of Technology, Puiestee 78, 51008 Tartu, Estonia
3Department of Physics, University of Minho, 4800-058 Guimarães, Portugal

Received 29 August 2014; Accepted 15 October 2014

Academic Editor: Mangala P. Singh

Copyright © 2015 Protima Rauwel et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Silver has been recognized as a nontoxic, safe inorganic antibacterial/antifungal agent used for centuries. Silver demonstrates a very high potential in a wide range of biological applications, more particularly in the form of nanoparticles. Environmentally friendly synthesis methods are becoming more and more popular in chemistry and chemical technologies and the need for ecological methods of synthesis is increasing; the aim is to reduce polluting reaction by-products. Another important advantage of green synthesis methods lies in its cost-effectiveness and in the abundance of raw materials. During the last five years, many efforts were put into developing new greener and cheaper methods for the synthesis of nanoparticles. The cost decrease and less harmful synthesis methods have been the motivation in comparison to other synthesis techniques where harmful reductive organic species produce hazardous by-products. This environment-friendly aspect has now become a major social issue and is instrumental in combatting environmental pollution through reduction or elimination of hazardous materials. This review describes a brief overview of the research on green synthesis of silver metal nanoparticles and the influence of the method on their size and morphology.