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Full-Text Articles in Physics
Control Of Surface Plasmon Resonances In Dielectrically Coated Proximate Gold Nanoparticles Immobilized On A Substrate, P. Rooney, A. Rezaee, S. Xu, T. Manifar, Chitra Rangan
Control Of Surface Plasmon Resonances In Dielectrically Coated Proximate Gold Nanoparticles Immobilized On A Substrate, P. Rooney, A. Rezaee, S. Xu, T. Manifar, Chitra Rangan
Physics Publications
We present experimental and theoretical results for the changes in the optical-plasmon resonance of gold-nanoparticle dimers immobilized on a surface when coated with an organic dielectric material. The plasmon band of a nanoparticle dimer shifts to a higher wavelength when the distance between neighboring particles is decreased, and a well-separated second peak appears. This phenomenon is called cross-talk. We find that an organic coating lets cross-talk start at larger separation distances than for uncoated dimers by bridging the gap between immobilized nanoparticles (creating optical clusters). We study this optical clustering effect as a function of the polarization of the applied …
Measurements Of Total Cross Sections For Positron Scattering By Uracil Molecules, E. Surdutovich, G. Setzler, W.E. Kauppila, Steven J. Rehse
Measurements Of Total Cross Sections For Positron Scattering By Uracil Molecules, E. Surdutovich, G. Setzler, W.E. Kauppila, Steven J. Rehse
Physics Publications
We present measurements of total cross sections for 1 to 30 eV positrons scattered by uracil molecules. The measurements are done using a beam transmission technique on a setup adjusted to accommodate the nature of uracil and we discuss possibilities of future experiments studying positron interactions with more complicated targets. These and future investigations of positron interactions with biomolecules have potential relevance to various biomedical applications.