Surface plasmon resonance and photoluminescence studies of Au and Ag micro-flowers
The surface plasmon resonance (SPR) and photoluminescence characteristics of gold and silver micro-flowers were compared to those of gold and silver nanoparticles. The microflower structures were grown under electron beam deposition using an alumina template. Both types of metallic micro-flowers sho...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
Optical Society of America
2015
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/19290/ http://dx.doi.org/10.1364/OME.5.000943 |
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| Institution: | Universiti Malaya |
| Summary: | The surface plasmon resonance (SPR) and photoluminescence characteristics of gold and silver micro-flowers were compared to those of gold and silver nanoparticles. 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. 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 microflowers 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. |
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