1. Materials and Nanotechnology ProgramNorth Dakota State University Fargo ND 58102 USA
2. Department of PhysicsNorth Dakota State University Fargo ND 58102 USA
3. Department of Mechanical EngineeringNorth Dakota State University Fargo ND 58102 USA
4. Department of Materials Science & Engineering Soft Materials and Structures LabIowa State University Ames IA 50011 USA