Low-Cost Plasmonic Carbon Spacer for Surface Plasmon-Coupled Emission Enhancements and Ethanol Detection: a Smartphone Approach
Surface plasmon-coupled emission (SPCE) has led to significant advancements in analytical techniques on account of its unique characteristics that include highly polarized photon-sorting ability. In this study, we report the use of a low-cost activated carbon as a plasmonic spacer in the SPCE substrate for achieving 30-fold enhancement in fluorescence emission. We extend the use of this spacer in the presence of Rhodamine B Base, a lactone dye as the sensing material for smartphone-based ethanol detection on the SPCE platform. Ethanol detection from 1 to 6% concentration highlights the potential use of this technique in monitoring fermentation processes.
KeywordsEthanol sensing Surface plasmon-coupled emission Activated carbon Fluorescence enhancement Plasmonic spacer engineering
Surface plasmon-coupled emission
Rhodamine B Base
In-plane lattice constant
S.S.R. and P.K.B acknowledge the support from DBT-Ramalingaswamy fellowship (102/IFD/SAN/776/2015-16), DST-Fast Track, and UGC-BSR fellowship, Govt. of India. S.P.C acknowledges financial support from DST Inspire Faculty Award. Authors thank the Department of Physics, Sri Sathya Sai Institute of Higher Learning, for providing access to the X-ray diffraction and Raman spectroscopic facility purchased under financial support from DST-FIST. Guidance from Bhagawan Sri Sathya Sai Baba is also gratefully acknowledged.
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
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