Figure 1

Typical low magnification FESEM image (a and b) and high magnification FESEM image (c) of the as-prepared products. The inset in (b) is EDS spectrum of the NPs. (d) Size distribution of as-synthesized silica NPs.

Typical low magnification FESEM image (a and b) and high magnification FESEM image (c) of the as-prepared products. The inset in (b) is EDS spectrum of the NPs. (d) Size distribution of as-synthesized silica NPs.