1. Beijing Advanced Innovation Center, for Soft Matter Science and Engineering Beijing University, of Chemical Technology Beijing 100029 China
2. The Molecular Foundry Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
3. Energy Technologies Area Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
4. Graduate Group of Applied Science and Technology University of California Berkeley CA 94720 USA
5. Environmental Energy Technologies Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
6. Materials Science and Engineering Department University of California Berkeley CA 94720 USA
7. Materials Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
8. Polymer Science and Engineering Department University of Massachusetts Amherst MA 01003 USA