Figure 4.

SEM images of sample MS7 at different nitric acid contents. (a) 3.34, (b) 2.0, (c) 1.0, (d) 0.5, and (e) 0.2 mol relative to 100 mol water. Image (a) contains the corresponding TEM image.

Alsyouri et al. Nanoscale Research Letters 2013 8:484   doi:10.1186/1556-276X-8-484
Download authors' original image