The phenomenon of spontaneous instabilities of Pb nanoparticles was studied quantitatively by time-resolved transmission electron microscopy. The phenomenon rates were studied by high-resolution electron microscopy and by dark field microscopy. The origin of the phenomenon as a radiation effect of the high voltage electron beam was excluded by finding the same rates at 200 and 1250 kV electron beams, below and above the threshold for the knock-on process, respectively. The dependence of phenomenon rate on the particles' size was found to be inversely proportional to the particle volume. The temperature was found to influence both the probability for a particle to be in the unstable state and the rate of instabilities. The results are compared with our recent results obtained for spontaneous instabilities of Bi nanoparticles.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 8 Aug 2007|