We gratefully acknowledge support from the following funding agencies
National Science Foundation
Department of Energy
Siemens Corporate Research
We acknowledge access to and support from the following facilities
Materials Sciences Division, LBNL
Marvell Nanolab, U. C. Berkeley
The Molecular Foundry, LBNL
Advanced Light Source, LBNL
National Center for Electron Microscopy, LBNL
National Energy Research Scientific Computing Center, LBNL