1. Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
2. National Institute for Nanotechnology, National Research Council Canada, 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
3. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada
4. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
5. nanoFAB Centre, University of Alberta, Edmonton, Alberta T6G 2 V4, Canada