1. Department of Chemical
and Bimolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
2. State Key Laboratory
of Tribology, Tsinghua University, Beijing 100084, People’s Republic of China
3. Center for Bio/Molecular
Science and Engineering, Naval Research Laboratory, Washington, D.C. 20375, United States
4. Department of Biology, Lewis and Clark College, Portland, Oregon
97219, United States