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Sensitizing of Sm3+ fluorescence by silver dopant in the TiO2 films

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Dolgov L., Kiisk V., Reedo V., Pikker S., Sildos I., Kikas J.
Open Physics
|
2011
|
vol. 9
|
issue 2
542-546
EN
Composite material based on a TiO2 matrix doped with Sm3+ ions and co-doped with silver was investigated. Samarium ions together with nano- and micro-aggregates of silver were incorporated into the titanium alkoxide during the sol-gel process. Samarium ions were excited either directly (λ exc = 488 nm) or through the TiO2 host (λ exc = 355 nm). It was revealed that samarium fluorescence (λ exc = 488 nm) in gelled TiO2 films is enhanced by up to 20 times in the vicinity of silver inclusions. Sensitizing and plasmonic mechanisms of enhancement in Sm3+ fluorescence are discussed.
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