1. Department
of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, United States
2. Department
of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794, United States
3. Nitride Solutions
Inc., 3333 West Pawnee Street, Wichita, Kansas 67213, United States
4. Department
of Physics, Kansas State University, Manhattan, Kansas 66506, United States