1. Department of Mechanical Engineering, Stanford University, Room 101, Building 530, 440 Escondido Mall, Stanford, CA 94305
2. Department of Chemistry, Stanford University, Room 125, William Keck Science Building, Stanford, CA 94305
3. Intel Corporation, 5000 W Chandler Blvd., Chandler, AZ 85226
4. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801-2918