Synthesis and Characterization of a New Surface-Modified Nanoparticle Using Fluoroalkanoic Acids as a Wettability Alteration Agent

Figure 5

FESEM images of the (a) unmodified nanosilica, (b) PFOA-modified nanosilica, and (c) PFNA-modified nanosilica.

(a)

(b)

(c)