About the Authors

Kurt Andresen

kandrese@gettysburg.edu

Affiliation Department of Physics, Gettysburg College, Gettysburg, Pennsylvania, United States of America

Isabel Jimenez-Useche

Affiliation School of Chemical Engineering, Purdue University, West Lafayette, Indiana, United States of America

Steven C. Howell

Affiliation Department of Physics, George Washington University, Washington, District of Columbia, United States of America

Chongli Yuan

Affiliation School of Chemical Engineering, Purdue University, West Lafayette, Indiana, United States of America

Xiangyun Qiu

Affiliation Department of Physics, George Washington University, Washington, District of Columbia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KA CY XQ IJU SCH. Performed the experiments: KA IJU XQ SCH CY. Analyzed the data: KA IJU XQ CY SCH. Contributed reagents/materials/analysis tools: IJU CY SCH XQ KA. Wrote the manuscript: KA IJU SCH XQ CY.