About the Authors

Dallas D. Freeman
Kyungwho Choi
Choongho Yu

chyu@tamu.edu

Affiliation Department of Mechanical Engineering, Texas A&M University, College Station, Texas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CY DF. Performed the experiments: DF KC CY. Analyzed the data: CY DF. Contributed reagents/materials/analysis tools: DF KC CY. Wrote the paper: DF CY KC.