[1] Univ Maine, CNRS, UMR, Lab Phys Etat Condense, F-72085 Le Mans 09, France
[2] Univ Paris 06, Lab Chem Matiere Condensee, F-75252 Paris 05, France
[3] Univ New Mexico, Ctr Micro Engineered Mat, Adv Mat Lab, Albuquerque, NM 87106 USA
[4] Univ New Mexico, Adv Mat Lab, Dept Chem & Nucl Engn, Albuquerque, NM 87106 USA
[5] Sandia Natl Labs, Albuquerque, NM 87185 USA