Nano Lett 2014 Jul 4;14(7):3953-8. Epub 2014 Jun 4.
Department of Electrical and Computer Engineering, ‡The Richard E. Smalley Institute for Nanoscale Science and Technology, ¶NanoJapan Program, #Department of Chemistry, ●Department of Physics and Astronomy, and □Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States.