Interfacial influences on metallic nanoparticle optical properties at high temperatures in Au-YSZ nanocomposites

PHYS 488

Phillip H. Rogers, progers@uamail.albany.edu, George Sirinakis, and Michael Carpenter, MCarpenter@uamail.albany.edu. College of Nanoscale Science and Engineering, University at Albany, SUNY, 255 Fuller Rd, Albany, NY 12203
Increased dampening of the surface plasmon resonance (SPR) band of Au nanoparticles embedded in yttria stabilized zirconia (YSZ) has been observed for Au-YSZ thin films at 500 °C under increasing O2 concentrations in N2. It has been proposed that this broadening in the SPR band is due to an adsorbate induced dampening of the SPR band, which was initially observed using gas aggregation techniques on Ag nanoparticles, and can be observed at elevated temperatures by simply changing the gas environment of Au-YSZ films. We have developed a model to describe the changes we see in the SPR band broadening based on adsorbate induced dampening theory for metallic nanoparticles. The model agrees with experimental results within a factor of three and shows promise in furthering the understanding of the optical properties possessed by noble metal nanoparticles embedded in a metal oxide matrix.
 

PHYS Poster Session - Nanostructured Materials and Nanophotonics
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster

Division of Physical Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008