1. B CUBE ‐ Center for Molecular Bioengineering Technische Universität Dresden 01307 Dresden Germany
2. Department of Physics University of California Berkeley CA 94720 USA
3. National Center for Electron Microscopy, Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
4. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
5. Department of Materials Science and Engineering University of California Berkeley CA 94720 USA