C sub(60) as an active smart spacer material on silver thin film substrates for enhanced surface plasmon coupled emission

In this study, we present the use of C sub(60) as an active spacer material on a silver (Ag) based surface plasmon coupled emission (SPCE) platform. In addition to its primary role of protecting the Ag thin film from oxidation, the incorporation of C sub(60) facilitated the achievement of a 30-fold...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2015-04, Vol.17 (15), p.10022-10027
Main Authors: Mulpur, Pradyumna, Podila, Ramakrishna, Ramamurthy, Sai Sathish, Kamisetti, Venkataramaniah, Rao, Apparao M
Format: Article
Language:English
Subjects:
Buckminsterfullerene
Emission
Fullerenes
Plasmons
Silver
Spacers
Surface chemistry
Thin films
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Summary:In this study, we present the use of C sub(60) as an active spacer material on a silver (Ag) based surface plasmon coupled emission (SPCE) platform. In addition to its primary role of protecting the Ag thin film from oxidation, the incorporation of C sub(60) facilitated the achievement of a 30-fold enhancement in the emission intensity of rhodamine B (RhB) fluorophore. The high signal yield was attributed to the unique pi - pi interactions between C sub(60) thin films and RhB, which enabled efficient transfer of energy of RhB emission to Ag plasmon modes. Furthermore, minor variations in the C sub(60) film thickness yielded large changes in the enhancement and angularity properties of the SPCE signal, which can be exploited for sensing applications. Finally, the low-cost fabrication process of the Ag-C sub(60) thin film stacks render C sub(60) based SPCE substrates ideal, for the economic and simplistic detection of analytes.
ISSN:1463-9076
1463-9084
DOI:10.1039/c4cp06090c