[1] Univ Toulouse 3, Inst Natl Polytech Toulouse, Lab Plasma & Convers Energie LAPLACE, F-31062 Toulouse 9, France
[2] CNRS, LAPLACE, F-31062 Toulouse, France
[3] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66451, Mexico
[4] Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
[5] Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USA