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(A) Excitation spectra of pyrene in aqueous solution of mPEG-P(LA12-co-GA9)2 at different concentrations (λem = 390 nm); (B) the intensity ratio (I336.5/I334) as a function of concentration of (a) mPEG-P(LA4-co-GA9)2, (b) mPEG-P(LA12-co-GA9)2, (c) mPEG-P(LA24-co-GA8)2, and (d) mPEG-P(LA45-co-GA15)2.
Abbreviations: mPEG, monomethoxy poly(ethylene glycol); P(LA-co-GA), poly(L-lactide-co-glycolide).
