Abstract
The surface plasmon resonance (SPR) and photoluminescence characteristics of gold and silver micro-flowers were compared to those of gold and silver nanoparticles. The micro-flower structures were grown under electron beam deposition using an alumina template. Both types of metallic micro-flowers showed systematic arrangements; they formed islands of flowers about 20 µm across, each one comprised of spikes ranging from 1 to 5 µm in length. A red shift in the SPR and enhancement intensity was observed for both micro-flowers and nanoparticles; the incremental increase was more than 50%. These results, which showed that gold and silver micro-flowers agglomerate at a micron size scale, are useful for the design of easier and more cost effective methods for large area fabrication, especially for particular plasmonic applications.
Highlights
Plasmonic properties of metallic nanoparticles have been extensively studied because of their unique optical properties such as resonant absorption and light scattering [1]
The microflower structures were grown under electron beam deposition using an alumina template
Both types of metallic micro-flowers showed systematic arrangements; they formed islands of flowers about 20 μm across, each one comprised of spikes ranging from 1 to 5 μm in length
Summary
Plasmonic properties of metallic nanoparticles have been extensively studied because of their unique optical properties such as resonant absorption and light scattering [1].
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