AVS 53rd International Symposium
    Biomaterial Interfaces Thursday Sessions
       Session BI-ThM

Paper BI-ThM7
Plasmonic Coupling in Biomolecule Linked Nanoparticle Assemblies

Thursday, November 16, 2006, 10:00 am, Room 2014

Session: Plasmonic Methods and Sub-micron Structures for Biology and Medicine
Presenter: A.A. Lazarides, Duke University
Authors: A.A. Lazarides, Duke University
D.S. Sebba, Duke University
E.R. Irish, Duke University
Correspondent: Click to Email
Metal nanoparticle assemblies support delocalized plasmon resonances that are highly sensitive to interparticle spacing, when particles are positioned within the near fields of their neighbors. We have observed near field coupling in biomolecule-linked core/satellite structures and have observed, further, controllable plasmon band modulation when the assemblies are linked by reconfigurable tethers. The nature of the modulation depends upon both the strength of the plasmon coupling and the composition of the component particles. Accurate electrodynamic calculations confirm the observed relationships between assembly structure, composition, and optical properties. Approximate, analytic, dipole coupling models provide insight into the material-dependence of the observed band modulation phenomena.