1. Department of Materials Science and Engineering University of California Berkeley CA 94720 USA
2. Department of Electrical Engineering and Computer Science University of California Berkeley CA 94720 USA
3. Department of Physics Cornell University Ithaca NY 14853 USA
4. Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
5. Department of Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA
6. Components Research Intel Corporation Hillsboro OR 97124 USA
7. Department of Physics California State University Northridge Northridge CA 91330 USA
8. National Center for Electron Microscopy Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
9. Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA
10. Department of Physics University of California Berkeley CA 94720 USA