1. James Cook University, 1/14-88 McGregor Road, Cairns, Australia
2. Department of Chemistry, University of Houston, Houston, Texas 77204, USA
3. Nanomaterials and Devices Laboratory, University of Houston, Houston, Texas 77204, USA
4. Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA
5. James Cook University, James Cook University Drive, Townsville, Australia