[1] Univ Calif Davis, Biophys Grad Grp, Davis, CA 95616 USA
[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[3] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA
[4] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA