1. Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
2. Chevron Corporation, Houston, Texas 77002, United States
3. Shell Technology Center, Houston, Texas 77082, United States
4. Occidental Corporation, Houston, Texas 77046, United States
5. SIMS Laboratory, Shared Equipment Authority, Rice University, Houston, Texas 77005, United States