1. Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, Department of Chemical Engineering, University of Washington, Box 351750, Seattle, Washington 98195-1750, Department of Bioengineering, University of Washington, Box 351720, Seattle, Washington 98195-1720, and Pacific Northwest National Laboratory, 902 Battelle Boulevard, Box 999, Richland, Washington 99352