1. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
2. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
3. Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
4. Columbia Hill Technical Consulting, Fremont, California 94539, USA
5. IBM Almaden, San Jose, California 95120, USA