1 research outputs found
MoS<sub>2</sub>/WS<sub>2</sub>/BN-Silver Thin-Film Hybrid Architectures Displaying Enhanced Fluorescence via Surface Plasmon Coupled Emission for Sensing Applications
Extremely
thin layers of MoS<sub>2</sub>, WS<sub>2</sub>, and BN
have come to the fore as a “beyond graphene” class of
emerging 2D-materials that display many interesting properties and
have wide technological applications. In this study, we report the
first time engineering of these novel nano 2D-materials as efficient
spacer layer components in silver (Ag) based thin-film stacks that
generated up to 17-fold enhancement in the emission intensity of rhodamine
B (RhB) fluorophore molecules; based on the surface plasmon coupled
emission (SPCE) platform. The exceptional mechanical, thermal, and
chemical stability of these 2D-spacer layers enabled effective surface
passivation of Ag thin-films. The superior signal enhancements observed
from the different 2D-spacer substrates may be attributed to optimal
changes in radiative decay rates of excited RhB states. In a manner
not reported before, we demonstrate the tunability of SPCE signal
enhancements, on choosing spacer materials of appropriate refractive
index. In this work, we further present a detailed comparison between
MoS<sub>2</sub>/WS<sub>2</sub>/BN, and also nanocarbon allotropes
like graphene and C<sub>60</sub>, which we have previously reported
as high-performance spacers in biosensing applications. The low-cost
fabrication of Ag-(MoS<sub>2</sub>/WS<sub>2</sub>/BN) thin-film architectures,
synergistically coupled with superior fluorescence signals produced
by SPCE, promises the application of these portable platforms for
the detection of various biochemical analytes with very high levels
of sensitivity