In situ and time resolved study of the image-image transition in nanometric particles

In situ and real-time study of the image to image-image transition is carried out on the H10 beamline at LURE (France). image-image particles are synthesized by soft chemistry. These particles have an average diameter evaluated by X-ray diffraction of image and a specific surface area of image. The size of produced image-image particles is determined by in situ and time resolved X-ray diffraction measurements at different temperatures. An amazing evolution of size with time is revealed: an abrupt doubling of the image-image particle size is observed whatever the heating temperature. Some assumptions are given in order to explain this phenomenon which implies at the same time surface energy, granulometric distribution and coalescence of particles.