1. Department of Chemistry, Smalley Institute for Nanoscale Science and Technology, Center for Biological and Environmental Nanotechnology, Rice University, Houston, Texas 77251-1892, Laboratoire de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland, TDA Research, Inc., 12345 West 52nd Avenue, Wheat Ridge, Colorado 80033, Philips Medical Systems, Cleveland, Ohio, Department of Radiology, St. Luke's Episcopal Hospital/Texas Heart Institute,...