Abstract:This paper presents a gel-based three-dimensional (3D)
substrate
for surface-enhanced Raman spectroscopy (SERS) mediated by photonic
nanojets (PNJs) to enhance the sensitivity of SERS detection. The
porous structure of the gel-based substrate allowed small molecules
to diffuse into the substrate, while the placement of silica beads
on the substrate surface resulted in the generation of photonic nanojets
during SERS measurements. Because the gel-based SERS substrate had
electromagnetic (EM) hot spots along the … Show more
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