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Top-view SEM micrograph of dealloyed with an average nanopore sizes of (a) 10, (b) 20, and (c) 30 nm. (d) Three-dimensional electron tomograph of NPG with the nanopore size of .
(a) Fluorescence emission spectra of ICG conjugated to the HSA-coated NPG films with different pore size . Inset: Absorption spectrum of ICG. (b) EFs of ICG/HSA/NPG films as a function of under the excitations of 514.5 and 632.8 nm, respectively. (c) Pore size dependence of near-field and quantum yield enhancements of ICG/HSA/NPG films under the illumination of 514.5 nm.
(a) UV-Visible extinction spectra of NPG films coated with HSA layers. [(b) and (c)] Schematic nanostructures used for DDA simulations and [(d) and (e)] their typical electric field distributions on the top surface of ligament. (f) Total near-field enhancement , electric field enhancements of single ligament and electromagnetic coupling between neighboring ligaments as a function of . and are calculated on the basis of schematic nanostructures (b) and (c), while . The incident light of 514 nm was polarized in the x direction.
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