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. Author manuscript; available in PMC: 2011 Dec 22.
Published in final edited form as: J Am Chem Soc. 2010 Nov 30;132(50):17724–17732. doi: 10.1021/ja102138a

Figure 1.

Figure 1

Left: (A–F) TEM images of low and high magnification of iron oxide NPCs using CTAB as an emulsifier. The initial size of nanoparticles in the organic phase were: (A, B) 3 nm, (C, D) 6 nm, and (E, F) 12 nm respectively. Scale bars: A, C, 150 nm; B, D 20 nm; E, 300 nm; F, 40 nm. Also See Figure S1 for larger view. Right: top: AFM image of NPCs made from 6 nm iron oxide NPs; bottom: extracted height information from two isolated clusters (line 1) and four contacting clusters in a row (line 2). The TEM images along with AFM characterization indicate that the NPCs were spheres composed of densely packed individual nanoparticles.