1. Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
2. National Institute for Nanotechnology, National Research Council Edmonton, Edmonton, Alberta T6G 2M9, Canada
3. Department of Chemical and Materials Engineering, University of Alberta, 9211-116 Street NW, Edmonton, Alberta T6G 1H9, Canada