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. Author manuscript; available in PMC: 2013 Oct 31.
Published in final edited form as: J Control Release. 2011 Dec 2;160(2):10.1016/j.jconrel.2011.11.030. doi: 10.1016/j.jconrel.2011.11.030

Fig. 6.

Fig. 6

EM images of alkane-modified PEI particles. Alkane-modified PEI particles were stained with phosphotungstate and imaged by EM. (A) particles at a lipid:PEI ratio of 0.56 were clearly noticed on the grid; on the other hand, particles with a lipid:PEI ratio of 2.91 (B) were unstable during the imaging preparation procedure, although silhouettes of the particles could be noticed on the grid, and excess stained material was removed from the figure by false coloring.