Figure 7.

TEM micrographs of silica nanoparticles obtained at different aging times. 3 (a), 5 (b), 6 (c), 7 (d), 8 (e), and 12 h (f).

Le et al. Nanoscale Research Letters 2013 8:58   doi:10.1186/1556-276X-8-58
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