1. Department
of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
2. Department
of Physics, United States Air Force Academy, USAF Academy, Colorado 80840, United States
3. Consiglio
Nationale delle Ricerche, Istituto di Biostrutture e Bioimmagini, Via Mezzocannone
16, 80136 Naples, Italy