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Long term UV-visible spectra of polyelectrolyte–coated gold nanorods (PE-GNRs) dispersed in serum-free media and serum-containing media. EGDE3.3′-PSS-CTAB-GNRs (λmax = 770 nm) dispersed in serum-free media (A) and serum-containing media (C); pEI25k-PSS-CTAB-GNRs dispersed in serum-free media (B) and serum-containing media (D).
