1. Department of Chemical and Petroleum Engineering Swanson School of Engineering, University of Pittsburgh, Pittsburgh 15261, Pennsylvania, United States
2. Laboratory of Computational Science and Modelling, Institute of Materials, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
3. Department of Nanobiology, Sandia National Laboratories, Albuquerque 87185, New Mexico, United States