A Zeiss XRM-510 X-ray microscope was used for high-resolution in situ imaging. The X-ray energy was 80 KeV, power 7 W, and the exposure time was set to 1.2 s. Samples were placed in soda glass tubes of dimensions 12mm, and two tubes could be accommodated within a single scan. All tomograms were reconstructed into three-dimensional images using the Zeiss Reconstructor Software, and further quantification of 2D slices taken from the rendered model was performed using ImageJ. For measurements to investigate stability of nanoparticles, the scan time was 1 hour and 40 minutes. In time-resolved experiments to measure diffusion, the scan time was approx. 35 minutes, and the scans were repeated successively until the total time reached 24 h.