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Synchronous scans (20 nm offset) of ratiometric nanoemulsion formulations 24-29 in phosphate buffers. Inset (24) shows pH range for series. Single component ratiometric control nanoemulsion 28 contains no Cy3-PFPE; 29 contains no CypHer5-PFPE. All spectra are normalized to EX 548 nm (Cy3).
