Fig. 3: 2D ptychographic phases and defocused TEM images.
From: Three-dimensional electron ptychography of organic–inorganic hybrid nanostructures
a–c Normalised 2D ptychographic phases with doses of 88, 45 and 26 e−/Å2, respectively. Reconstructed with independent randomly initialised phase guesses (as shown in Supplementary Fig. 9). d, e Normalised representative TEM images (from a set of typically 20 recorded) with doses of 27 e−/Å2 and defoci of −0.1 and −2.8 μm, respectively. f–j Frequency histograms of the background and DNA strands for a–e, respectively. k Line profiles extracted from the positions indicated by white lines in a–e. l Resolution estimates of the ptychographic reconstructions using Fourier ring correlation. Blue and green curves are calculated using two reconstructions at 45 and 26 e−/Å2, respectively.
