1. 3M Company, St. Paul, MN, USA
2. Quantachrome Instruments, Boynton Beach, FL, USA
3. Weapons and Materials Research Directorate, U.S. Army Research Lab, Aberdeen Proving Ground, MD, USA
4. The Dow Chemical Company, Midland, MI, USA
5. National Institute of Standards and Technology, Gaithersburg, MD, USA
6. United Technologies Research Center, East Hartford, CT, USA