Figure 2: Stereo-imaging of an RNAi microsponge.

(a) Visualization of projected images with a 3D model. The core region in each projection is highlighted by dotted lines. Density is plotted as a contour map for improved visualization. (b–d) Reconstructed images are shown for the +45° (b), 0° (c) and −45° (d) projections. The electron densities are estimated with the values on the colour bar corresponding to 105 electrons per nm2. Scale bars, 500 nm.