Fig. 1
Image resolution for a gold-on-carbon sample in 5 mbar N2 as a function of total and areal electron-dose-rates. The displays are FFTs of high-resolution TEM images (Additional file 1: Fig. S1). The image resolution is denoted for each illumination condition and corresponds (as indicated by a dashed circle) to the lattice fringe with the highest spatial frequency, except at the highest total dose-rate at which the resolution represents an estimate from the onset of the sudden drop in intensity in the FFTs. The inset in the upper right corner of each FFT shows the corresponding result from an image acquired in vacuum. In each FFT, the disk denotes the relative size of the illuminated sample area and varied from 50 to 600 nm in diameter. Disks colored yellow and red corresponds to identical diameters of 100 and 200 nm, respectively