Fig. 6: d-glucose sensing results.
From: High-sensitivity nanophotonic sensors with passive trapping of analyte molecules in hot spots
a Reflection spectra of a device before (dot-dashed curves) and after (solid curves) introducing a 1 μL droplet of glucose solution at three different concentrations. The black solid curve corresponds to the glucose absorption spectrum. b Extracted differential spectra from the data of the two lowest concentrations in a, both before and after applying the correction for the interfering spectral features due to the water absorption lines
