Fig. 1: Schematic illustration and characterization of the surface chemical modification process.
From: Ultrasensitive detection of endocrine disruptors via superfine plasmonic spectral combs
a Schematic illustration of immobilizing the DTB-PEG-SH and BSA molecules on the fiber surface; b reflected spectra collected every 20 s for stability in water (66 min) and for real-time monitoring in DTB-PEG-SH (67 min) and BSA (33 min) solution; c the response curves of gold film-coated TFBG for the marked modes ①, ②, and ③, i.e., intensity variation as a function of time during the water stability, DTB-PEG-SH, and BSA functionalization processes. Inset shows 3-D AFM topographic images of (a) bare and (b) DTB-modified plasmonic optical fiber.
