Fig. 5. Schematic illustration of the immobilization of GOx enzymes on graphene via pyrene and the subsequent fabrication of single- and multi-layered enzyme electrodes. [Reprinted with permission from ref. 196, J. Liu, N. Kong, A. Li, X. Luo, L. Cui, R. Wang and S. Feng, Graphene Bridged Enzyme Electrodes for Glucose Biosensing Application, Analyst, 2013, 138, 2567–2575. Copyright© Royal Society of Chemistry.].
