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. Author manuscript; available in PMC: 2012 Feb 29.
Published in final edited form as: Adv Funct Mater. 2010 Nov 9;20(21):3721–3726. doi: 10.1002/adfm.201000711

Figure 4.

Figure 4

Fluorescence imaging of solvent induced nanoparticle leaching. Fluorescence microscopy images of QDMMs (a, b) and QDMM@SiO2 (d, e) before and after sonication for 2 minute in chloroform, respectively. QDs in the uncoated QDMMs rapidly diffused out but not in the QDMM@SiO2 case. (c, f) Quantitative spectroscopy results show that the fluorescence intensity of uncoated QDMMs decreased by 85%. In contrast, after silica coating, QDMM@SiO2 fluorescence drop was less than 2% after chloroform treatment.