1. Department of Chemical and Biomolecular Engineering, The University of Akron, 185 E. Mill St., Akron, Ohio 44325, USA
2. Department of Electrical and Computer Engineering, The University of Akron, Akron, Ohio 44325, USA
3. Department of Polymer Science, Goodyear Polymer Centre, The University of Akron, Akron, Ohio 44325-3909, USA