1. Laboratoire d'Etude des Microstructures, ONERA-CNRS, 92322 Châtillon, France, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, U.K., Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), BP 60069, 59652 Villeneuve d'Ascq Cedex, France, Laboratoire de...