Abstract
Herein, we demonstrate a facile, rapid, and scalable method to fabricate polymer-based gratings for surface-enhanced Raman spectroscopy (SERS) sensors. To accomplish this, epoxy nanostripe arrays on silicon substrates were prepared using thermal annealing and UV-cross-linking. After preparation of the nanostripe arrays, the surface was briefly treated with oxygen plasma, which decreased the surface energy and enabled the growth of AgNPs on the polymer surface using a simple, low-cost, aqueous-based synthesis procedure. The SERS substrates exhibited a detection limit of ∼1 pM using rhodamine 6G (R6G). In addition, preliminary work with E. coli DH5 showed that the nanoimprinted substrates can be used to obtain Raman spectra of washed bacteria cells.
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Strack, G., Fitzgerald, M., Su, J. et al. Nanoimprinted SERS Sensors for Chemical and Biological Detection. MRS Advances 2, 1077–1082 (2017). https://doi.org/10.1557/adv.2017.44
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DOI: https://doi.org/10.1557/adv.2017.44