|Nanoscale Pyramids: A Multifunctional Plasmonic System |
Chemistry and Chemical Biology
|Teri Odom, Northwestern University. |
11:00 AM, WL-Aud-Chem
The interaction of light with surface plasmons�collective oscillations of free electrons�in metallic nanostructures has resulted in the demonstration of enhanced optical transmission through nanoscale holes is responsible for the brilliant, tunable colors in stained glass windows. This talk will focus on the properties of a new plasmonic system, pyramidal nanoparticles, which are fabricated by a top-down, large-area nanoscale patterning procedure called PEEL. These anisotropic particles can be composed of one or more materials having tips with radii of curvature as small as 2 nm. We will describe the unique, orientation-dependent optical properties of individual pyramids as well as arrays of gold pyramidal shells. In addition, we will discuss how this structure is ideal for achieving multifunctional particles because the materials, chemical, and biological functionalization can be independently controlled. Such tunability at the nanoscale offers exciting opportunities in biomedical applications.