Plasmon-Mediated Photopolymerization Maps Plasmon Fields for Silver Nanoparticles
K.G. Stamplecoskie, Natalia L. Pacioni, Dayle Larson, and J.C. Scaiano, “Plasmon-Mediated Photopolymerization Maps Plasmon Fields for Silver Nanoparticles”, J. Am. Chem. Soc., 133 (24), 9160-9163 (2011); May 2011.
Visible light exposure of films containing silver nanoparticles (AgNPs) shows that the enhanced field around AgNPs in a thin film containing an azo free radical initiator (AIBN) and a triacrylate selectively cross-links the triacrylate within the plasmonic region around the particles. The cross-linked polymer is less soluble than its precursor and behaves as a solubility switch. After the film is developed with ethanol, polymer-encapsulated nanoparticles are preserved on the surface. The 8–10 nm polymer structure that encapsulates the particles effectively maps and preserves the morphology of the plasmon field in AgNP-controlled nanostructures.