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We report Raman scattering results of wurtzite ZnS nanowires, nanocombs, and nanobelts. The Raman spectrum obtained from ZnS nanowires exhibits first‐order phonon modes at 272, 284, and 350 cm−1, corresponding to A1/E1 transverse optical, E2 transverse optical, and A1/E1 longitudinal optical phonons, respectively. Several multiphonon modes are also observed. The longitudinal optical phonon mode varies...
We investigate the optical properties and surface-enhanced Raman scattering (SERS) of plasmonic nanodome array substrates that are demonstrated to provide a reproducible SERS enhancement factor of 1.18×1010 for detection of a urinary metabolite used to monitor kidney function.
Continuous monitoring of fluids in medical tubing is desired for point-of-care clinical diagnostics. In this work, we incorporate a nanostructured surface-enhanced Raman scattering (SERS) sensor into flexible tubing commonly used for intravenous drug delivery and urinary catheters. We investigate the detection of promethazine (pain medication) and urea (common metabolite found in urine) as model systems...
We demonstrate a surface-enhanced Raman scattering substrate consisting of a closely spaced metal nanodome array fabricated on flexible plastic film. We used a low cost, large area replica molding process to produce a 2-dimensional periodic array of cylinders that is subsequently overcoated with SiO2 and silver thin films to form dome-shaped structures. Finite element modeling was used to investigate...
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