[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA
[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[3] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
[4] Univ Washington, Dept Bioengn, Seattle, WA 98195 USA
[5] Philip Morris Inc, Res Ctr, INEST Grp, Richmond, VA 23234 USA