Correction to: Nature Communications https://doi.org/10.1038/s41467-018-02895-9, published online 31 January 2018.

The original version of this Article contained errors in Figs. 1a, 2a, 3a, and 4b, in which the units on the scale bars incorrectly read ‘µm’ rather than the correct ‘nm.’ This has been corrected in both the PDF and HTML versions of the Article.