10.1038/ncomms4990
In Fig. 2a of the main manuscript and in Supplementary Fig. 3, the unit label for C−2 (on the vertical axis) should read (cm4/μF2) instead of (m4/μF2).
This correction only applies to the labels in these two figures and does not affect any of the calculations or conclusions in the paper.
Footnotes
The online version of the original article can be found at 10.1038/ncomms4990
