1. Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Walter Scott Engineering Center, Lincoln, Nebraska
68583-0857
2. Department of Physics and Astronomy, University of Nebraska-Lincoln, Jorgensen Hall, 855 North 16th Street, Lincoln, Nebraska
68588-0299
3. Department of Chemistry, University of North Texas, 232
Science Research Bldg. Ave. B and Mulberry Streets, Denton, Texas 76203-5017
4. Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Walter Scott Engineering Center, Lincoln, Nebraska
68583-0857 and Nebraska Center for Energy Sciences Research, University of Nebraska-Lincoln, Whittier Research Center, Lincoln, Nebraska
68583-0857