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Journal of Nanomaterials
Volume 2012, Article ID 512579, 6 pages
Research Article

Photogenerating Silver Nanoparticles and Polymer Nanocomposites by Direct Activation in the Near Infrared

1Institut de Science des Matériaux de Mulhouse, CNRS LRC 7228, 15 rue Jean Starcky, 68057 Mulhouse, France
2Laboratoire Réactions et Génie des Procédés, CNRS UPR 3349, Nancy-University, 1 rue Grandville, 54001 Nancy, France
3Department of Photochemistry, CNRS FRE 3252, Haute Alsace University, 3 rue A. Werner, 68100 Mulhouse, France

Received 8 August 2011; Accepted 6 September 2011

Academic Editor: Sevan P. Davtyan

Copyright © 2012 Lavinia Balan 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.


This work reports on an improvement of the photochemically assisted synthesis of silver nanoparticles by direct photoreduction of AgNO3 with a laser source emitting in the near infrared range (NIR). For this, polymethine dyes were used as the photoactive agents. Both the effects of central chain structure and activation intensity were investigated. The reduction kinetics was followed up by UV-Vis spectroscopy, and the particles size was evaluated by transmission electron microscopy. The results showed that light intensity affects both the average size and size distribution of Ag nanoparticles generated through this process. The particles can also be generated in situ in a photopolymerizable formulation so that metal/polymer nanocomposites become available through a one-step photoassisted process on the basis of NIR activation. The process described herein is very fast (seconds to a few minutes), and it readily lends itself to automatization for mass production of micro-optical elements implemented directly onto integrated NIR sources.