1. Department of Materials Science and Engineering; Stanford University; 496 Lomita Mall Stanford CA 94305 USA
2. Department of Physics; Stanford University; 382 Via Pueblo Mall Stanford CA 94305 USA
3. Department of Chemistry; Stanford University; Stanford CA 94305 USA
4. Advanced Light Source One Cyclotron Road; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
5. Stanford Institute of Materials and Energy Sciences; SLAC National Accelerator Laboratory; 2575 Sand Hill Road Menlo Park CA 94025 USA