1. Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
2. Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
3. Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States
4. Institute of Problems of Chemical Physics of Russian Academy of Sciences, Chernogolovka, Moscow District 142432, Russia