1. Department of Chemical and Materials Engineering, School of Engineering, University of Dayton, 300 College Park, Dayton, OH 45469, USA.
2. Air Force Research Laboratory, Human Effectiveness Directorate, AFRL/RH, Wright-Patterson Air Force Base, OH 45433, USA.
3. Department of Mechanical Engineering, University of Akron, Akron, OH 44325, USA.
4. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.