1. CNRS Univ. Bordeaux Bordeaux INP ICMCB UMR 5026 Pessac F‐33600 France
2. McKetta Department of Chemical Engineering 200 E Dean Keeton St The University of Texas at Austin Austin TX 78712 USA
3. Walker Department of Mechanical Engineering and Texas Materials Institute 204 E Dean Keeton St The University of Texas at Austin Austin TX 78712 USA
4. Univ. Bordeaux CNRS INSERM Bordeaux Imaging Center BIC UMS 3420, US 4 Bordeaux F‐33000 France
5. CNRS Univ. Bordeaux CRPP UMR 5031 Pessac F‐33600 France