Optical properties of plasmon-coupled 2-D arrays of gold nanoparticles

ANYL 136

David D. Evanoff Jr., evanoff@clemson.edu, School of Materials Science and Engineering, Clemson University, 91 Technology Drive, Anderson, SC 29625 and George Chumanov, gchumak@clemson.edu, Department of Chemistry, Clemson University, Clemson, SC 29634.
Advancements in the development of plasmonic devices utilizing metal nanoparticles require investigation of the coupling of plasmon resonances of closely spaced particles. Gold nanoparticles of various diameters between 50 and 100nm were synthesized via a novel method that produces monodispersed, highly crystalline particles and were assembled into semi-regular 2D arrays on poly(vinylpyridine)-modified glass substrates. The interactions of the local electric fields around the particles lead to coherent coupling of the particles' plasmon resonance, which was manifested as a substantial blue-shift and sharpening of the resonance. The dependence of plasmon coupling on particle size, interparticle distance, and dielectric environment was interrogated. The sensitivity of the coupling to the local refractive index makes these arrays useful in various sensing applications.
 

General Papers
7:00 PM-9:00 PM, Sunday, 28 August 2005 Washington DC Convention Center -- Hall A, Poster

Division of Analytical Chemistry

The 230th ACS National Meeting, in Washington, DC, Aug 28-Sept 1, 2005