Figure 2.

The LB assembly of single monolayers of GO on top of a silicon wafer with different regions of compression area: (a) dilute monolayers of isolated GO sheets, (b) close-packed arrangement, (c) over-packed monolayers with a folded sheet at interconnecting edges and (d) over-packed monolayers with folded and partially overlapped GO sheets interlocking with each other. (e) Isothermal surface pressure versus subphase (water) area plotted for the corresponding regions of (a–d). Scale bar is 20 µm. Reprinted with permission from the Journal of the American Chemical Society, copyright 2009, American Chemical Society [37].