Fig. 5: Hollowing process of the nanocuboids.
From: Imaging Cu2O nanocube hollowing in solution by quantitative in situ X-ray ptychography
a–f Ptychographic images of the hollowing process between 11.4 and 15.1 h reaction time. The gray scale indicates the phase shift of the images in radian. g Schematic illustration of the void formation. h False-colored SEM image of bowl-shaped hollow nanocuboids (orange) taken from the same sample used for the in situ imaging in a–f. i SEM image of hollow nanocuboids cut in half using a FIB. These particles were prepared in the in situ reactor but without exposure to X-rays. The sample was sputtered with a thin Au layer (yellow) to minimize charging effects. In the areas cut with the FIB, the substrate can be seen (blue). j Scatter plot of the void size versus the outer particle dimension obtained from SEM images of the same sample used for the in situ imaging in a–f. The fit indicates a systematic size ratio of 53%.
