Correction to: Nature Materials https://doi.org/10.1038/s41563-020-00825-z, published online 19 October 2020.

In the version of this Article originally published, ref. 60 was a duplicate of ref. 42. Ref. 60 should have been ‘Engel, L. et al. Extracellular matrix micropatterning technology for whole cell cryogenic electron microscopy studies. J. Micromech. Microeng. 29, 115018 (2019).’ This has now been corrected in all versions of the Article.