Correction to: Nature Nanotechnology https://doi.org/10.1038/nnano.2014.93, published online 11 May 2014.

In the Supplementary Information for this Article, Supplementary Fig. 9b wrongly showed the electron energy-loss spectroscopy (EELS) spectrum for the carbon nanotube sample SWCNT-EDA instead of for the graphene sample G-EDA. The inset is correct. The original and corrected version of Supplementary Fig. 9b is shown below. The corrected Supplementary Information file is attached to this correction notice; the original file has not been amended.

Supplementary Fig. 9b
figure 1

Original and corrected.