1. Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
2. Laboratory of Computational Science and Modeling, IMX, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
3. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
4. Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, I-09042 Monserrato, CA, Italy