1. Department of Civil & Environmental Engineering, North Dakota State University, 1410 14th Ave N, Fargo, North Dakota 58108, United States
2. Department of Physics, North Dakota State University, 1211 Albrecht Blvd, Fargo, North Dakota 58108, United States
3. Materials and Nanotechnology, North Dakota State University, 1410 14th Ave N, Fargo, North Dakota 58108, United States