About the Authors

Rebecca L. Ball

Affiliation Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Christopher M. Knapp

Affiliation Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Kathryn A. Whitehead

kawhite@cmu.edu

Affiliations Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America, Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America

Competing Interests

KAW has a pending patent application related to the materials contained in this manuscript. The application title is “Amine-Containing Lipidoids and Uses Thereof”, U.S. Patent Application No. 14/089,603, with a filing date of November 25, 2013. This does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials. The authors have no other competing interests to declare.

Author Contributions

Conceived and designed the experiments: RLB CMK KAW. Performed the experiments: RLB CMK. Analyzed the data: RLB CMK KAW. Contributed reagents/materials/analysis tools: RLB CMK KAW. Wrote the paper: RLB CMK KAW.