1. School
of Electronic Engineering, Bangor University, Bangor LL57 1UT, United Kingdom
2. Materials
and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson
AFB, Ohio 45433, United States
3. Synchrotron Research, Inc., Melbourne, Florida 32901, United States
4. National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
5. Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
6. The Molecular
Foundry, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Department
of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, United States