1. Department of Civil and Environmental Engineering, University of Nebraska─Lincoln, Lincoln, Nebraska 68588-053, United States
2. Nanomaterials Characterization Core, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
3. Department of Food Science & Technology, University of Nebraska─Lincoln, Lincoln, Nebraska 68588-6205, United States
4. Department of Mechanical & Materials Engineering, University of Nebraska─Lincoln, Lincoln, Nebraska 68588-0526, United States
5. Department of Electrical & Computer Engineering, University of Nebraska─Lincoln, Lincoln, Nebraska 68588-0511, United States