1. National Research Council Canada─Nanotechnology Research Centre, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
2. Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
3. Defence Research and Development Canada, Suffield Research Centre, P.O. Box 4000, Stn. Main, Medicine Hat, Alberta T1A 8K6, Canada
4. Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada