1. Department of Chemical Engineering, University of Massachusetts, Lowell, MA 01854, USA
2. Department of Chemistry, University of Massachusetts, Lowell, MA 01854, USA
3. Department of Physics, University of Massachusetts, Lowell, MA 01854, USA
4. Department of Plastics Engineering, University of Massachusetts, Lowell, MA 01854, USA
5. U.S. Army Natick Soldier Research Development and Engineering Center, Natick, MA 01760, USA