By a News Reporter-Staff News Editor at Physics Week -- Current study results on Chemical Physics have been published. According to news originating from Atlanta, Georgia, by VerticalNews correspondents, research stated, "Dimers of hollow gold nanorectangles ((197 +/- 4) x (134 +/- 6) nm outside and (109 +/- 5) x (53 +/- 3) nm inside) were fabricated via electron beam lithography with interparticle separations ranging from 27 +/- 2 nm to 596 +/- 8 nm. Spectroscopic investigation of these arrays showed multiple peaks under illumination polarized both parallel and perpendicular to the interparticle axis."
Our news journalists obtained a quote from the research from the School of Chemistry and Biochemistry, "Discrete dipole approximation theoretical calculations were used to investigate the nature of these multiple peaks. These calculations demonstrate that the multiple peaks arise due to a combination of multiple plasmon modes and interactions with the substrate. The substrate effects are more pronounced for the parallel polarization because parallel polarization (along the long axis) of the nanorectangles results in a much stronger dipole mode than for the perpendicular polarization (along the short axis). Next, we show how these peaks change, as the hollow nanorectangles are brought within coupling range of one another."
According to the news editors, the research concluded: "In this endeavor, we make use of our previously reported method to directly convert scanning electron microscope images of the nanoparticles into the shape files for the theoretical calculations."
For more information on this research see: Hollow gold nanorectangles: The roles of polarization and substrate. Journal of Chemical Physics, 2013;139(4):624-630. Journal of Chemical Physics can be contacted at: Amer Inst Physics, Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, NY 11747-4501, USA. (American Institute of Physics - www.aip.org/; Journal of Chemical Physics - jcp.aip.org/)
The news correspondents report that additional information may be obtained from R.D. Near, Georgia Inst Technol, Sch Chem & Biochem, Laser Dynam Lab, Atlanta, GA 30332, United States.
Keywords for this news article include: Atlanta, Georgia, United States, Chemical Physics, North and Central America
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC