1. Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
2. Department of Physics, University of Washington, Seattle, Washington 98195, United States
3. Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
4. Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States
5. Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
6. Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
7. Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, United States