[1] Department of Chemical Engineering, University of California, Berkeley, CA 94720, United States
[2] Department of Material Science and Engineering, Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742, United States
[3] Department of Chemistry and Biochemistry, University of Texas, Austin, TX 78712, United States
[4] Micron Technology, Boise, ID 83716, United States