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Researchers at Babes-Bolyai University Release New Data on Gold Nanoparticles [Finite-Difference Time-Domain (FDTD) design of gold nanoparticle...

August 22, 2014



Researchers at Babes-Bolyai University Release New Data on Gold Nanoparticles [Finite-Difference Time-Domain (FDTD) design of gold nanoparticle chains with specific surface plasmon resonance]

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Gold Nanoparticles have been published. According to news reporting originating in Cluj Napoca, Romania, by NewsRx journalists, research stated, "We employ Finite-Difference Time-Domain (FDTD) simulations to analyze the electromagnetic far- and near-field response of gold nanoparticles (NPs) organized in chain-like structures as function of the number of particles and inter-particle distance in structures. As a result an empirical formula to predict the position of collective localized surface plasmon resonance (LSPR) as function of number of particles in the chain is devised."

The news reporters obtained a quote from the research from Babes-Bolyai University, "On the other hand the experimental LSPR spectrum recorded from a colloidal solution exhibiting a certain degree of aggregation has been effectively reconstructed by linear combination of individual LSPR contribution as calculated for NP ensembles of different size (monomers, dimers, trimers, etc.). Notably, we find that the maximum of electric field intensity (E-2) in between adjacent NPs increases from dimeric to trimeric and tetrameric ensembles, followed by a steady state decrease as the number of NPs per chain further increases. The central gap in a long chain of NPs accommodate the highest field enhancement ('hot-spots')."

According to the news reporters, the research concluded: "Our findings are relevant for designing effective substrates for Surface-Enhanced Raman Scattering (SERS) and plasmonic waveguides."

For more information on this research see: Finite-Difference Time-Domain (FDTD) design of gold nanoparticle chains with specific surface plasmon resonance. Journal of Molecular Structure, 2014;1072():137-143. Journal of Molecular Structure can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Molecular Structure - www.elsevier.com/wps/product/cws_home/500850)

Our news correspondents report that additional information may be obtained by contacting C. Tira, University of Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania. Additional authors for this research include D. Tira, T. Simon and S. Astilean (see also Gold Nanoparticles).

Keywords for this news article include: Europe, Romania, Cluj Napoca, Nanotechnology, Gold Nanoparticles, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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