1. Biosensors and Bioelectronics
Centre, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
2. Laboratory
of Organic Electronics, Department of Science and Technology, Linköping University, 602 21 Norrköping, Sweden
3. College of Life and Science, Sichuan Agricultural University, Yaan 625014, People’s Republic of China