About the Authors

Deyan Luan

Affiliation Department of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

Michael Zai

Affiliation Department of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

Jeffrey D Varner

To whom correspondence should be addressed. E-mail: jdv27@cornell.edu

Affiliation Department of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JDV conceived and designed the experiments and wrote the paper. DL and MZ performed the experiments. DL and JDV analyzed the data.