1. Program of Materials Science, University of California San Diego, La Jolla, California 92093, United States
2. Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
3. Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States
4. Department of NanoEngineering and Chemical Engineering, University of California San Diego, La Jolla, California 92093, United States
5. Department of Wood Science, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
6. Program of Chemical Engineering, University of California San Diego, La Jolla, California 92093, United States
7. Advanced Research Projects Agency - Energy, U.S. Department of Energy, Washington, D.C. 20585, United States