1. Department of Chemistry Oregon State University Corvallis OR 97331‐4003 USA
2. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
3. Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN 37235 USA
4. Department of Chemistry University of California Riverside CA 92521 USA
5. Hewlett‐Packard Co. 1000 NE Circle Blvd. Corvallis OR 97330 USA