Figure 3.
Fluorescence spectra in PBS (pH 7.4) at λex = 555 nm: 0.5 mg/mL 9% PLGA-Cy5 NP (containing 9 wt% labeled polymer), 1% Pep-Cy3 NP (containing 1 wt% feed Pep-Cy3), and FRET NP (containing 1 wt% feed Pep-Cy3 and 1.5–9 wt% PLGA-Cy5).
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