1. Laboratory of Advanced Structural Studies, Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, H−1525 Budapest, Hungary
2. Brunel Centre of Advanced Solidification Technology, Brunel University, Uxbridge, Middlesex UB8 3PH, U.K.
3. Department of Mathematical Sciences, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
4. Departments of Physics, Chemistry, Geoscience, Materials Science, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
5. Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, California 94720, United States
6. B CUBE−Center for Molecular Bioengineering, Technische Universität Dresden, 01307 Dresden, Germany