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(A) Emission spectra of NBD-C18/SA LB monolayers deposited various distances from the SIF surface. Fluorescence spectra of NBD-C18/SA on a glass surface is also included (- -). (B) Fluorescence enhancement factor relative to the glass for NBD-C16 (▲) and NBD-C18 (■) probes as a function of monolayer distance from the SIF surfaces.
