Correction to: Nature Nanotechnology https://doi.org/10.1038/s41565-019-0381-6, published online 25 February 2019.

In the version of this Article originally published, in Fig. 5j, the image labelled ‘siNT@NPs’ was incorrect. The correct Fig. 5j is shown below and has been updated in the online versions of the Article.

Fig. 5
figure 1

Original and Corrected.