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. Author manuscript; available in PMC: 2008 Sep 19.
Published in final edited form as: J Am Chem Soc. 2007 Mar 3;129(12):3524–3526. doi: 10.1021/ja068452k

Figure 2.

Figure 2

Fluorescence spectra obtained upon 488 nm excitation of a single polymer nanoparticle after pre-illumination of the sample with a UV lamp for 2 min. As time elapses, the red fluorescence converts to green fluorescence.