1. Department of Mechanical Engineering, University of California—Merced, 5200 N. Lake Road, Merced, California 95343, United States
2. Chemistry and Chemical Biology, University of California—Merced, 5200 N. Lake Road, Merced, California 95343, United States
3. Department of Advanced Material Science, the University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8561, Japan