1. Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, California Nanosystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, Department of Chemistry, Northwestern University, Evanston, Illinois 60208, and Department of Chemistry, Indiana University, Bloomington,...