DocumentCode :
1604336
Title :
The development of nano-structured plasmonic composite by two-step ion-exchange processes
Author :
Tsao, Shu-Yin ; Tai, Chao-Yi
Author_Institution :
Dept. of Opt. & Photonics, Nat. Central Univ., Jhongli, Taiwan
fYear :
2012
Firstpage :
1
Lastpage :
3
Abstract :
Surface enhanced Raman scattering (SERS) active substrate was fabricated using Ag+-Na+ ion-exchange technique. A thin layer of Aluminum was subsequently deposited which provides electrons and effectively promotes the reduction of the Ag+ ions in the follow-up Na+-K+ ion exchange process. The extinction spectrum exhibits a broadened and red-shifted peak indicating that the filling fraction was increased, and the distribution of the particle size and shape are multi-dispersed. The trend can be explained by Maxwell Garnett theory enabling molecular sensing over a wide spectral range. The spectral fingerprint of Rhodamine 6G molecules is successfully detected in the Raman spectrum.
Keywords :
composite materials; ion exchange; plasmonics; Maxwell Garnett theory; Raman spectrum; active substrate; extinction spectrum; filling fraction; ion exchange process; molecular sensing; nanostructured plasmonic composite; particle size; red shifted peak; spectral fingerprint; spectral range; surface enhanced Raman scattering; Optics; Substrates;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on
Conference_Location :
Birmingham
ISSN :
1944-9399
Print_ISBN :
978-1-4673-2198-3
Type :
conf
DOI :
10.1109/NANO.2012.6322190
Filename :
6322190
Link To Document :
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