[1] Department of Chemistry, University of Massachusetts Lowell, Lowell,MA,01854, United States
[2] Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell,MA,01854, United States
[3] Center for Advanced Material and Science, University of Massachusetts Lowell, Lowell,MA,01854, United States
[4] US Army DEVCOM Soldier Center, Natick,MA,01760, United States