Affiliation: | 1. Department of Chemistry, Smalley Institute for Nanoscale Science and Technology, and the Center for Biological and Environmental Nanotechnology, MS 60, Rice University, P.O. Box 1892, Houston, TX 77251‐1892, USA;2. Department of Bioengineering, MS 142, Rice University, P.O. Box 1892, Houston, TX 77251‐1892, USA;3. Center for Materials Chemistry, Department of Chemistry, University of Houston, 136 Fleming Bldg., Houston, TX 77204‐5003, USA |