1. Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan S7N 5A9, Canada
2. NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
3. Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32816, United States
4. Department of Physics, University of Central Florida, Orlando, Florida 32816, United States