1. Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
2. University Program in Materials Science and Engineering, Duke University, Durham, North Carolina 27708, United States
3. Duke University NMR Center, Duke University Medical Center, Durham, North Carolina 27710, United States
4. Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
5. Federal University of ABC, 09210-580 Santo André, São Paulo, Brazil
6. Center for Hybrid Organic Inorganic Semiconductors for Energy, Golden, Colorado 80401, United States