Fig. 5. Dimers for SERS and SEIRA.
a SEM image of prism dimers and simulated electric field contour plot of both polarizations. b SERS spectra of 2-naphthalenethiol SAM excited by 785 nm laser, and c SERS enhancement factor of prism dimers with varying gaps between prisms for both polarizations. Reproduced with permission from ref. 60. Copyright (2013) American Chemical Society d SEM and simulated electric field distribution of a bowtie antenna (at 1536 cm–1). e SEIRA of 4-NTP SAM on a single antenna. Reference spectra of solid-state 4-NTP are shown in black with prominent vibrations indicated by dashed lines. Reproduced with permission from ref. 62. Copyright (2017) American Chemical Society