Corrigendum: Monitoring the orientation of rare-earth-doped nanorods for flow shear tomography.

Nature Nanotechnology 12, 914–919 (2017); published online 19 June 2017; corrected after print 26 September 2017 In the version of this Article originally published, the label in Fig. 1d that said 'σ = π' was incorrect, and should have said 'α = π'. This has been corrected in the online version and the correct panel is shown here.