1. Department
of Chemistry, Durban University of Technology, Durban 4000, South Africa
2. Biosensors
and Bioelectronics Centre, IFM, Linköping University, Linköping 58183, Sweden
3. Department
of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
4. Tekidag AB, UCS, Teknikringen 4A, Mjärdevi Science Park, Linköping 58330, Sweden