1. Department
of Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
2. Department
of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
3. Information
Engineering Department, University of Pisa, via G. Caruso 16, Pisa 56122, Italy
4. Technological Institute of Tijuana, 22414 Tijuana, Baja California, Mexico
5. Department
of Bioengineering, University of California, San Diego, 9500 Gilman
Drive, La Jolla, California 92093-0358, United States
6. Gin
College, Nanjing Normal University, Nanjing 210097, Jiangsu, China