1. The Molecular Foundry Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley CA 94720 USA
2. Department of Chemistry University of California Berkeley Berkeley CA 94720 USA
3. Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
4. Advanced Light Source Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley CA 94720 USA
5. Materials Sciences Division Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley CA 94720 USA